Pdr1000an1200 Opsmanual [606319]
– 1 –
MODEL S
PDR-1000AN & PDR -1200S
PERSONAL DATARAM PARTICULATE MONITORING
INSTRUCTION MANUAL
P/N (tba)
THERMO ELECTRON COR PORATION
ENVIRONMENTAL INSTRUMENTS
27 FORGE PARKWAY FRANKLIN MASSACHUSETTS 02038
(866) 282 -0430 Toll Free
(508) 520 -0430 International
(508) 520 -1460 Fax
www.thermo.com/ ih
REVISED: January 2004
ORIGIN: APRIL 2000
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© 2003 Thermo Electron Corporation. All rights reserved. Thermo Electron Corporation, question
everythin g, and Analyze. Detect. Measur e. Control are trademarks of Thermo Electron Corporation.
All other product names and logos are the property of their respective owner.
Specifications, terms and pricing are subject to change. Not all products are available in all countries.
Please consult your local s ales representative for details.
– 3 – WARRANTY
Seller warrants that the Products will operate substantially in conformance with Seller's
published specifications, when subjected to normal, proper and intended usage by
properly trained personnel, for 13 months from date of installation or 12 months from
date of shipment, whichever is less (the "Warranty Period"). Seller agrees during the
Warranty P eriod, provided it is promptly notified in writing upon the discovery of any
defect and further provided that all costs of returning the defective Products to Seller are
pre-paid by Buyer, to repair or replace, at Seller's option, defective Products so as to
cause the same to operate in substantial conformance with said specifications.
Replacement parts may be new or refurbished, at the election of Seller. All replaced parts
shall become the property of Seller. Shipment to Buyer of repaired or replacement
Products shall be made in accordance with the provisions of Section 5 above. Lamps,
fuses, bulbs and other expendable items are expressly excluded from the warranty under
this Section 8. Seller's sole liability with respect to equipment, materials, parts or
software furnished to Seller by third party suppliers shall be limited to the assignment by
Seller to Buyer of any such third party supplier's warranty, to the extent the same is
assignable. In no event shall Seller have any obligation to make repairs, re placements or
corrections required, in whole or in part, as the result of (i) normal wear and tear, (ii)
accident, disaster or event of force majeure, (iii) misuse, fault or negligence of or by
Buyer, (iv) use of the Products in a manner for which they wer e not designed, (v) causes
external to the Products such as, but not limited to, power failure or electrical power
surges, (vi) improper storage of the Products or (vii) use of the Products in combination
with equipment or software not supplied by Seller. If Seller determines that Products for
which Buyer has requested warranty services are not covered by the warranty hereunder,
Buyer shall pay or reimburse Seller for all costs of investigating and responding to such
request at Seller's then prevailing time and materials rates. If Seller provides repair
services or replacement parts that are not covered by the warranty provided in this
Section 8, Buyer shall pay Seller therefore at Seller's then prevailing time and materials
rates.
ANY INSTALLATION, MAINTENA NCE, REPAIR, SERVICE, RELOCATION OR
ALTERATION TO OR OF, OR OTHER TAMPERING WITH, THE PRODUCTS
PERFORMED BY ANY PERSON OR ENTITY OTHER THAN SELLER WITHOUT
SELLER'S PRIOR WRITTEN APPROVAL, OR ANY USE OF REPLACEMENT
PARTS NOT SUPPLIED BY SELLER, SHALL IMMEDI ATELY VOID AND
CANCEL ALL WARRANTIES WITH RESPECT TO THE AFFECTED PRODUCTS.
THE OBLIGATIONS CREATED BY THIS SECTION TO REPAIR OR REPLACE A
DEFECTIVE PRODUCT SHALL BE THE SOLE REMEDY OF BUYER IN THE
EVENT OF A DEFECTIVE PRODUCT. EXCEPT AS EXPRESSLY PROVIDED IN
THIS SECTION 8, SELLER DISCLAIMS ALL WARRANTIES, WHETHER
EXPRESS OR IMPLIED, ORAL OR WRITTEN, WITH RESPECT TO THE
PRODUCTS, INCLUDING WITHOUT LIMITATION ALL IMPLIED WARRANTIES
OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE.
SELLER DOES NOT WARRANT THAT THE PRODUCTS ARE ERROR -FREE OR
WILL ACCOMPLISH ANY PARTICULAR RESULT.
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Table of Contents
1.0 GENERAL DESCRIPTION 7
2.0 SPECIFICATIONS 9
3.0 USER GUIDELINES 12
3.1 Handling Instructions 12
3.2 Safety Instructions 12
3.3 Handling and Operation 12
3.3.1 Model pDR-1000AN 12
3.3.2 Model pDR-1200 13
3.4 Air Sampling Guidelines 14
3.5 Environmental Constraints and Certifications 14
4.0 ACCESSORIES 14
4.1 Standard Accessories 14
4.2 Optional Accessories 15
5.0 INSTRUMENT LAYOUT 15
5.1 Front Panel 15
5.2 Bottom Base 20
5.3 Right Side Panel 20
5.4 Back Panel and Belt Clip 22
5.5 Sensing Chamber 23
6.0 PREPARATION FOR OPERATION 23
6.1 Battery Installation 23
6.2 Battery Replacement 24
6.3 AC Power Supply 25
6.4 Rechargeable Battery Module 25
6.5 Zeroing the personal DataRAM 25
6.5.1 Zeroing the model pDR-1000AN 26
6.5.2 Zeroing the model pDR-1200 26
6.6 pDR-1200 Filter Holder Installation 27
7.0 OPERATING MODES 27
7.1 Start -Up Mode 27
– 5 – 7.2 Ready Mode 27
7.3 Run and Logging Mode Mode 28
7.3.1 Data Logging 28
7.3.2 Clearing Memory 28
7.3.3 Run Mode Display and Commands 28
8.0 OPERATION 29
8.1 Start -Up 29
8.2 Setting Up For A Run 30
8.3 Measurement Run Procedure 31
8.4 Abbrevia ted Run Start/Stop Instructions 33
8.5 Resetting Procedure 33
9.0 COMMUNICATIONS WITH COMPUTER 34
9.1 Hardware and Software Requirements 34
9.2 Software Installation Procedure 34
9.3 Communications Between personal DataRAM and Computer 35
9.4 Real -Time RS-232 Output 36
10.0 ANALOG S IGNAL OUTPUT 37
10.1 Analog Output Description 37
10.2 Analog Output Connection 37
11.0 ALARM 38
11.1 Alarm Description and Operation 38
11.2 Alarm Output 38
11.3 Remote Alarm Unit 38
12.0 MAINT ENANCE 39
12.1 General Guidelines 39
12.2 Cleaning of Optical Sensing Chamber 39
12.2.1 Model pDR-1000AN 39
12.2.2 Model pDR-1200 40
12.3 Cyclone Cleaning (Model pDR-1200 only) 40
13.0 CALIBRATION 40
13.1 Factory Calibration 40
13.2 Field Gravimetric Calibration 41
13.3 Scattering Coefficient Calibration 42
– 6 – 13.4 Internal Span Check 42
14.0 PARTICLE SIZE CLASSIFICATION (Model pDR-1200 only) 42
14.1 Size Fractionated Monitoring 43
14.2 Particle Sizing 43
15.0 CON VERSION BETWEEN personalDataRAM VERSIONS 45
15.1 Conversion procedure from pDR-1000AN to pDR-1200 45
15.2 Conversion procedure from pDR-1200 to pDR-1000AN 46
16.0 SEQUENCE OF KEYSTROKES AND SCREENS 48
– 7 – 1.0 GENERAL DESCRIPTION
The MIE personal DataRAM (for Personal Data -logging Real -time Aerosol Monitor)
is a technologically advanced instrument designed to measure the concentration of
airborne particulate matter (liquid or solid), providing direct and c ontinuous readout
as well as electronic recording of the information.
The personal DataRAM is available in two versions: model pDR-1000AN and model
pDR-1200. The model pDR-1000AN operates as a passive air sampler whereas the
model pDR-1200 uses active air sampling. The user can convert from one to the other
of these two versions by means of optional conversion kits offered by MIE, Inc. (see
Sections 4.2 and 15.0 of this manual).
The model pDR-1000AN samples passively (i.e., without a pump) the air
surround ing the monitor; air accesses freely the sensing chamber of the instrument
by means of convection, diffusion, and adventitious air motion. The model pDR-
1200, on the other hand, requires a separate air driver (not included) such as a
personal -type pump for its operation.
In addition, the model pDR-1200 includes a particle size -selective inlet cyclone which
permits size segregated measurements (i.e., PM 10, PM 2.5, respirable, etc.) as well as
enables the user to perform aerodynamic particle sizing by varying the sampling flow
rate. The model pDR-1200 incorporates, downstream of its photometric sensing stage,
a standard 37 -mm filter holder on which all sampled particles are collected for
subsequent analysis or gravimetric referencing/calibration, if so desired .
The personal DataRAM is the result of many years of field experience acquired with
thousands of units of its well known predecessor, the MIE MINIRAM, and embodies
many technological advances made possible by the latest electronic hardware and
software. The personal DataRAM is also a worthy miniaturized companion to the MIE
DataRAM, a recognized paragon of portable aerosol monitors.
The personal DataRAM is a high sensitivity nephelometric (i.e. photometric) monitor
whose light scattering sensing configura tion has been optimized for the
measurement of the respirable fraction of airborne dust, smoke, fumes and mists in
industrial and other indoor environments.
The personal DataRAM is an ultra -compact, rugged and totally self -contained
instrument designed for hand -held, belt -worn, as well as unattended operation. It
is powered either by its internal replaceable battery, or by an optional attachable
rechargeable battery pack, or by an AC supply (included as standard accessory). For
the model pDR-1200, power to an adjunct pump must be provided separately.
Zeroing is accomplished by means of a hand -inflatable “zero air” pouch included
with the model pDR-1000AN, and by an inlet filter cartridge provided with the
model pDR-1200. In addition, the instrument automa tically checks agreement with
– 8 – its original factory calibration by checking its optical background during the zeroing
sequence.
The personal DataRAM covers a wide measurement range: from 0.001 mg/m 3
(1 µg/m 3) to 400 mg/m 3, a 400,000 -fold span, correspondi ng to very clean air up to
extremely high particle levels.
In addition to the auto -ranging real -time concentration readout, the
personal DataRAM offers the user a wide range of information by scrolling its two -line
LCD screen, such as run start time and da te, time averaged concentration, elapsed
run time, maximum and STEL values with times of occurrence, etc.
Operating parameters selected and diagnostic information displays are also
available. Furthermore, the personal DataRAM features complete, large capac ity
internal data logging capabilities with retrieval through an externally connected
computer. The stored information (up to 13,000 data points) includes average
concentration values, maximum and STEL values with time information as well as
tag numbers.
Selectable alarm levels with built -in audible signal and switched output, a RS -232
communications port, and a programmable analog concentration output (voltage
and current) are all part of this versatile instrument.
A custom software package is provided w ith the personal DataRAM to program
operating/logging parameters (e.g. logging period, alarm level, concentration
display averaging time, etc.) as well as to download stored or real -time data to a PC
or laptop for tabular and/or graphic presentation. If re quired, the data can also be
imported to standard spreadsheet packages (e.g. Microsoft Exc el™, Lotus 1 -2-3™,
etc.).
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2.0 SPECIFICATIONS
• Concentration measurement range (auto -ranging)1: 0.001 to 400 mg/m 3
• Scattering coefficient range: 1.5 x 10 -6 to 0.6 m -1 (approx.) @ λ =880 nm
• Precision/repeatability over 30 days (2 -sigma)2:
± 2% of reading or ±0.005 mg/m 3, whichever is larger, for 1 -sec. averaging time
±0.5% of reading or ±0.0015 mg/m 3, whichever is larger, for 10 -sec. averaging time
±0.2% of reading or ±0.0005 mg/m 3, whichever is larger, for 60 -sec. averaging time
• Accuracy1: ±5% of readin g ±precision
• Resolution: 0.1% of reading or 0.001 mg/m 3, whichever is larger
• Particle size range of maximum response: 0.1 to 10 µm
• Flow rate range (model pDR-1200 only): 1 to 10 liters/minute (external pump
required)
• Aerodynamic particle sizing range (model pDR-1200 only): 1.0 to 10 µm
• Concentration display updating interval: 1 second
• Concentration display averaging time3: 1 to 60 seconds
• Alarm level adjustment range3: selectable over entire measurement range
• Alarm averaging time3: real -time (1 to 6 0 seconds), or STEL (15 minutes)
• Datalogging averaging periods3: 1 second to 4 hours
• Total number of data points that can be logged in memory: 13,391
• Number of data tags (data sets): 99 (maximum)
• Logged data:
◊ Each data point: average concentration, tim e/date, and data point number
◊ Run summary: overall average and maximum concentrations, time/date of
maximum, total number of logged points, start time/date, total elapsed time
(run duration), STEL concentration and time/date of occurrence, averaging
(logg ing) period, calibration factor, and tag number.
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• Elapsed time range: 0 to 100 hours (resets to 0 after 100 hours)
• Time keeping and data retention: › 10 years
• Readout display: LCD 16 characters (4 mm height) x 2 lines
• Serial interface: RS -232, 4,800 bau d
◊ Computer requirements: IBM -PC compatible, 486 or higher, Windows ’95 or
higher, ≥ 8 MB memory, hard disk drive, 3.5" floppy, VGA or higher
resolution monitor
• Outputs:
◊ Real -time digital signal (1 sec -1): concentration, 16 -character code
◊ Real -time an alog signal: 0 to 5 V and 4 to 20 mA. Selectable full scale ranges of
3
: 0 – 0.1, 0 – 0.4, 0 – 1.0, 0 – 4.0, 0 – 10, 0 – 40, 0 – 100, and 0 – 400 mg/m 3.
◊ Minimum load impedance for voltage output: 200 k Ω.
◊ Maximum load impedance for current output: 300 Ω (when powered by A C
power supply)
◊ Alarm output: 1 Hz square wave, 5 V peak -to-peak amplitude. Load
impedance > 100 k Ω
• Internal battery: 9V alkaline, 20 -hour run time (typical)
• Current consumption: 15 to 25 mA (in Run Mode); 10 to 20 mA (in Ready Mode)
• AC source: universal voltage adapter (included) 100 -250 V~, 50 -60 Hz (CE
marked)
• Optional battery pack: model pDR-BP, rechargeable NiMH, 72 -hour run time
(typical)
• Operating environment: -10° to 50 ° C (14 ° to 122 ° F), 10 to 95% RH, non –
condensing
• Storage environment: -20° to 70 ° C (-4° to 158 ° F)
• Dimensions (max. external):
◊ Model pDR-1000AN: 153 mm (6.0 in) H x 92 mm (3.6 in) W x 63 mm (2.5 in) D
◊ Model pDR-1200 (including cyclone and filter holder) : 160 mm (6.3 in) H x 205 mm
(8.1in) W x 60 mm (2.4 in) D
– 11 –
• Weight:
◊ Model pDR-1000AN: 0.5 kg (18 oz)
◊ Model pDR-1200: 0.68 kg (24 oz)
• Cyclone (included in model pDR-1200 only): BGI model GK 2.05
• Filter holder (included in model pDR-1200 only): Millipore t ype MAWP 037 AO
(with 0.8 µm pore size filter)
________________________________________________________
1 Referred to gravimetric calibration with SAE Fine (ISO Fine) test dust
(mmd = 2 to 3 µm, sg = 2.5, as aerosolized)
2 At constant temperature and full battery voltage
3 User selectable
________________________________________________________
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3.0 USER GUIDELINES
3.1 Handling Instructions
The personal DataRAM is a sophisticated optical/electronic instrument and should be
handled accordingly. Although the personal DataRAM is very rugged, it should not be
subjected to excessive shock, vibration, temperature or humidity. As a practical
guideline, the personal DataRAM should be handled with the same care as a portable
CD player.
If the personal DataRAM has been exposed to low temperatures (e.g. in the trunk of a
car during winter) for more than a few minutes, care should be taken to allow the
instrument to return near room temperature before operating it indoors. This is
advisable because water vapor may condense on the interior surfaces of the
personal DataRAM causing temporary malfunction or erroneous readings. Once the
instrument warms up to near room temperature, such condensation will have
evaporated. If the personal DataRAM becomes wet (e.g. due to exposure to water
sprays, rain, etc.), allow the unit to dry thoroughly before operating.
Whenever the personal DataRAM is shipped care should be taken in placing it in its
carrying case and repackaging it wi th the original cardboard box with the factory
provided padding.
3.2 Safety Instructions
• Read and understand all instructions in this manual.
• Do not attempt to disassemble the instrument. If maintenance is required,
return unit to the factory for qua lified service.
• The personal DataRAM should be operated only from the type of power
sources described in this manual.
• When replacing the internal 9 -V battery, follow the instructions provided on
the back panel of the unit.
• Shut off personal DataRAM and any external devices (e.g. PC) before
connecting or disconnecting them.
• Shut off personal DataRAM before replacing the internal battery, or when
plugging in or disconnecting the AC power supply or the optional
rechargeable battery pack.
3.3 Handling and Ope ration
3.3.1 Model pDR-1000AN
The model pDR-1000AN can be operated in any position or orientation.
Exposure to high intensity fluctuating light of the interior of the sensing
chamber, through the front and back slotted air openings (see Section 5.5),
should be avoided. Such large intensity transients may cause erroneous
– 13 – readings. Direct access of sunlight to the sensing chamber should be
prevented.
Typical modes of instrument support/handling include:
• Hand -held. Do not obstruct or cover the sensing chamber o pening slots on
front and back of unit.
• Belt attached. Use belt clip provided as standard accessory. The unit can be
worn on a waist belt, or with optional shoulder belt (model pDR-SS) for
breathing zone monitoring.
• Tabletop operation. The pDR-1000AN c an be placed on a table either in an
upright position (i.e., resting on its lower protective bumper), or on its back
(i.e., resting on the rear edges of its two protective bumpers).
• Tripod mounted. The unit can be attached to any standard tripod using th e
threaded bushing on the bottom of the monitor (see Figure 3).
• Fixed point operation. The model pDR-1000AN can be mounted at a fixed
location (e.g., wall or post) using the optional wall -mounting bracket, model
pDR-WB.
3.3.2 Model pDR-1200
The pDR-1200 requires an external air suction device, such as a small
diaphragm pump (e.g., model pDR-PU) for its sampling operation. The inlet
of the pump must be connected by means of tubing to the hose fitting on the
pDR-1200 filter holder attached to sensing cham ber (see Figure 2).
The inlet metal tube of the cyclone can be oriented in any desired direction
(i.e., upward, forward, downward or backward) by rotating the cyclone body
within its holder cup on the right side of the sensing chamber (see Figure 2).
Always ensure unobstructed access to the cyclone inlet when sampling
directly the air in the instrument's vicinity. Alternatively, tubing can be
connected to the
cyclone inlet in order to extract a sample stream from a duct, chamber or other
enclosed volume .
Typical modes of instrument support/handling include:
• Hand -held. For example, using a personal type pump, clipped to the belt and
using a tubing connection to the pDR-1200.
• Belt attached. Use belt clip kit provided as standard accessory. The unit can b e
worn on a waist belt, or with the optional shoulder belt (model pDR-SS) for
breathing zone monitoring. A personal pump can then be belt -worn as well.
• Tabletop operation. The pDR-1200 can be placed on a table either in an upright
position (i.e. resting on its lower protective bumper), or on its back (i.e. resting
on its backside).
– 14 – • Tripod mounted. The unit can be attached to any standard tripod using the
threaded opening on the bottom base (see accessory attachment fitting on Fig.
4).
• Wall mounted for fixed point monitoring. Use optional wall mounting
bracket, model pDR-WB, either in combination with model pDR-PU pump
module and model pDR-AC power supply (powering both the pDR-1200 and
the pDR-PU), or with a separate pump.
3.4 Air Sampling Guidelines
Altho ugh the personal DataRAM is designed primarily for intramural use, i.e. for
indoor air quality, in -plant, or mining environment monitoring, its active sampling
version (model pDR-1200) also makes it compatible with extramural use (i.e. ambient
monitoring). General ambient monitoring applications, however, are performed
preferentially using an appropriate inlet configuration, in order to ensure
representative particle sampling under conditions of variable wind speed and
direction. Consult with MIE for such ou tdoor applications.
For typical area monitoring applications, the personal DataRAM should be placed and
operated centrally within the area to be monitored, away from localized air currents
due to fans, blowers, ventilation intakes/exhausts, etc. This is to ensure
representative sampling within the area to be assessed.
3.5 Environmental Constraints and Certifications
The personal DataRAM is designed to be reasonably dust and splash resistant,
however, it is not weatherproof. To operate the unit outdoors pr ovisions should be
made to protect it from environmental extremes outside its specified range, and from
any exposure to precipitation .
The personal DataRAM is certified for compliance with the electromagnetic radiation
limits for a Class A digital device, pursuant to part 15 of the FCC Rules. The unit also
complies and is marked with the CE (European Community) approval for both
immunity to electromagnetic radiation and absence of excessive emission
interference.
4.0 ACCESSORIES
4.1 Standard Accessories
The personal DataRAM is provided to the user with the following standard
accessories:
• Soft-shell carrying case (MIE model pDR-CC-1)
• Digital communications cable (MIE model pDR-DCC)
• Analog signal/alarm output cable (MIE model pDR-ANC)
• Communications softwar e disk (MIE model pDR-COM)
– 15 – • Z-Pouch zeroing kit (MIE model pDR-ZP)(for use with pDR-1000AN only)
• Zeroing filter cartridge and tubing (MIE model pDR-ZF)(for use with pDR-1200
only)
• Belt clip kit (MIE model pDR-CA)
• AC power supply (and charger for optional MI E model pDR-BP) (MIE model
pDR-AC)
• Metal cyclone (MIE model pDR-GK2.05)(for use with pDR-1200 only)
• 37-mm filter holder and hose fitting (MIE model pDR-FH)(for use with pDR-1200
only)
• Instruction manual
4.2 Optional Accessories
The following optional acc essories are available from MIE for use with the
personal DataRAM:
• Rechargeable battery module (MIE model pDR-BP)
• Shoulder strap (MIE model pDR-SS)
• Remote alarm unit (MIE model pDR-RA)
• Wall mounting bracket (MIE model pDR-WB)
• Active sampling kit to convert model pDR-1000AN to model pDR-1200 (MIE
model pDR-ASC)
• Upper bumper kit to convert model pDR-1200 to model pDR-1000AN (MIE model
pDR-UB)
• Attachable pump unit (MIE model pDR-PU)(for use with pDR-1200 only)
5.0 INSTRUMENT LAYOUT
The user should become fam iliar with the location and function of all externally
accessible controls, connectors and other features of the personal DataRAM. Refer to
Figures 1 through 6.
All user related functions are externally accessible. All repair and maintenance
should be perf ormed by qualified MIE personnel. Please contact the factory if any
problem should arise. Do not attempt to disassemble the personal DataRAM, except as
described in Section 12.0 (Maintenance), otherwise voiding of instrument warranty
will result .
5.1 Front Panel
Refer to Figures 1 (for model pDR-1000AN) or 2 (for model pDR-1200) for location of
controls and display.
The front panel contains the four touch switches (keys) and the LCD screen required
for the operation of the personal DataRAM.
– 16 – The four touch switches provide tactile ("popping") feedback when properly
actuated.
The ON/OFF key serves only to turn on the unit (while it is in the off state), and to
turn it off (when it is operating).
– 17 –
– 18 –
– 19 –
– 20 –
– 21 –
The EXIT and ENTER keys serve to execute spec ific commands that may be indicated
on the screen, and the NEXT key generally serves to scroll the displayed information,
e.g. to review the operating parameters that have been programmed, display
maximum/STEL values, diagnostic values, etc.
If an incorre ct command is keyed (e.g. ENTER when the personal DataRAM displays
real-time concentration) a beep is heard to alert the user.
The two -line, 16 -character per line LCD indicates either measured values of
concentration (instantaneous and time averaged on th e same screen), elapsed run
time, maximum and STEL (short term excursion limit) values, operating and logging
parameters, diagnostics, or other messages.
The acoustic alarm transducer is located directly behind the center of the MIE arrow
logo on the fron t panel.
5.2 Bottom Base
Refer to Figures 3 (for model pDR-1000AN) or 4 (for model pDR-1200). The base of
the personal DataRAM contains the following: a) internal battery compartment cover,
b) external DC power input receptacle, and c) threaded bushing fo r the attachment of
optional battery pack, tripod, or other mounting/support hardware.
Only the internal battery compartment cover should be opened by the user, for
removal and replacement of the on -board 9 -V battery. Removal of the base plate
could resul t in voiding of instrument warranty.
5.3 Right Side Panel
Refer to Figures 5 (for model pDR-1000AN) or 6 (for model pDR-1200) which shows
the manner of attachment of the belt clip assembly (belt clip should be attached only
if required by the user). The right side panel (as viewed from front panel) contains
the 6 -contact modular jack connector receptacle for digital (RS -232) communications
and analog signal output. This connector also provides the alarm output control for
a remote/auxiliary alarm signal. The contacts (from top to bottom) are:
1: 4 – 20 mA analog output (positive)
2: Alarm output
3: Digital data transmission
4: Digital input
5: Common ground (signal returns)
6: 0 to 5 V analog output (positive)
The digital communications cable prov ided as a standard accessory is to be inserted
into this receptacle for interconnection to a computer (for data downloading or to
– 22 – reprogram parameters). The analog output cable is provided with flying leads for
interconnection with other data processing a nd/or control systems.
WARNING: The modular jack receptacle on the side of the personal DataRAM
should be used only for communications with computers and alarm
circuitry. Do not, under any circumstance, connect any
communications equipment (e.g., telephone ) to this receptacle.
– 23 –
– 24 –
5.4 Back Panel and Belt Clip
The back panel consists of a label with important user information on safety
procedures and certifications, model and serial numbers, etc.
The back panel is provided with mounting hardware for the a ttachment of the belt
clip kit (see Figures 5 or 6 for mounting configuration of the belt clip).
– 25 – 5.5 Sensing Chamber
Referring to Figure 1 or 2, the upper mid -section of the personal DataRAM contains
the optical sensing chamber. This chamber is the only i nternal section that the user
should access for maintenance purposes (see Section 12.2).
On the model pDR-1000AN, air enters the sensing chamber through the two slot
shaped inlets (one on the front and other on the back) under the protective bumper.
Durin g instrument operation those two openings should remain unobstructed in
order to ensure free access of the surrounding air. When the model pDR-1000AN is
used as personal monitor, i.e., clipped to a person’s belt, the rear air inlet opening
may be partially obstructed, but care should be exercised in ensuring that the front
air inlet remains free of any obstructions.
On the model pDR-1200, air enters the sensing chamber through the opening in the
cyclone receptacle cup (black cup on right side of sensing ch amber), passes through
the photometric stage, and exits through the opening in the filter holder receptacle
cup (black cup on left side of sensing chamber), after which the air passes through
the filter.
6.0 PREPARATION FOR OPERATION
6.1 Battery Installa tion
When shipped from the factory, the personal DataRAM will arrive without its
replaceable 9V battery installed. Two fresh alkaline batteries are factory packed
separately in the carrying case, one of which should be installed in the
personal DataRAM when preparing it for operation.
NOTE: Whenever the personal DataRAM is to be left unused for an extended time
(i.e. longer than a month), the 9V battery should be removed from the unit.
Removing the battery will lose neither the program, time/date keeping, nor stored
data.
To install the battery proceed as follows:
• Hold the personal DataRAM upside down.
• Loosen thumbscrew that secures the battery compartment cover (see Figure 3
or 4), and remove that cover.
• Observe battery polarity and the back panel ba ttery orientation pattern (the
negative battery terminal is the one closer to the side of the instrument).
• Insert the battery by sliding it in until it bottoms out. It should protrude
slightly above the bottom surface of the instrument.
• Place battery c ompartment cover over battery and, while pushing down the
cover firmly (taking care that the cover seats flush on the bottom surface of the
personal DataRAM), tighten thumbscrew securely.
– 26 –
6.2 Battery Replacement
Normally, only alkaline type 9V batteries (type 1604A, or equivalent) should be used
with the personal DataRAM.
Only fresh batteries should be used in order to ensure the maximum operating time.
The personal DataRAM shuts itself off whenever the battery voltage falls below 6 volts
(while retaining all programming and data). A fresh 9V alkaline battery, at room
temperature, should provide typically 20 hours of continuous operation (please note
that not all manufacturers produce batteries of equal capacity). Intermittent
operation should extend the to tal running time because of partial battery recovery
effects.
The approximate remaining battery capacity is indicated by the personal DataRAM
(see Section 8.2) in increments of 1%, starting from 99%. If the remaining battery
capacity is 40% or less, immedi ate restarting after shut off is automatically inhibited
to prevent incomplete runs. If, nevertheless, a new run is to be initiated with low
remaining battery capacity, do not shut off the personal DataRAM at the end of the
previous run (i.e., remain in th e Ready Mode, see section 7.0).
When significantly extended operating times are required (beyond the typical 20
hours), the use of either lithium or zinc -air batteries can be considered. The use of
such alternative battery types can provide about 2 to 3 t imes longer operation than
alkaline batteries.
– 27 –
6.3 AC Power Supply
A universal line voltage AC to DC power supply (MIE model pDR-AC) is provided
as standard accessory with the personal DataRAM. This power supply can be used
with any line with a voltage b etween 100 and 240 VAC (50 to 60 Hz). When using
that power supply, its output plug should be inserted into the external DC receptacle
at the base of the personal DataRAM (see Figure 3 or 4). Insertion of that connector
automatically disables the internal 9 V battery of the instrument. Removal of the pDR-
AC plug from the instrument automatically re -connects the internal 9V battery.
NOTE: Before plugging in or unplugging the external power supply, the
personal DataRAM must be shut off.
6.4 Rechargeable Batter y Module
A rechargeable battery pack (MIE model pDR-BP) is available as an optional
accessory. This unit attaches directly to the base of the personal DataRAM.
The pDR-BP contains a sealed nickel -metal -hydride battery, which provides typically
72 hours of continuous operation between successive charges (for 3 -hour charging).
The use of the personal DataRAM, in combination with the pDR-BP connected to the
a.c. power line ensures totally uninterruptible operation over indefinitely long
time. In this operatin g mode, line power interruptions lasting up to 72 hours have no
effect on measurement run continuity.
To attach the pDR-BP to the personal DataRAM, the instrument should be shut off.
Carefully plug the pDR-BP into the external DC RECEPTACLE on the
personal DataRAM. Rotate the large thumbscrew at the opposite end of the pDR-BP
tightening it firmly. The pDR-BP can be recharged by means of the AC power supply
of the personal DataRAM.
Detailed instructions for the use of the rechargeable battery module are furn ished
with that accessory.
6.5 Zeroing the personal DataRAM
One of the most important steps to be performed by the user before initiating a
measurement run with the personal DataRAM is to zero the instrument. This is
required to ensure maximum accuracy of concentration measurements, especially at
low levels, i.e. below about 0.1 mg/m 3.
During the 2 -minute pre -run automatic zeroing sequence (see Section 8.1), the
personal DataRAM registers its own optical background, stores that level in its
memory, and then subtracts that background from all measured concentration
values, until the zero is updated again by the user.
– 28 –
Although zeroing can be performed as often as desired (e.g., before every run), in
practice it should not be necessary to do so more than once -a-month or even less
frequently, except if average particulate concentrations should exceed about 0.5
mg/m 3.
6.5.1 Zeroing the model pDR-1000AN
Zeroing of the model pDR-1000AN requires a particle -free environment such as a
clean room, clean bench, duct or area directly downstream of a HEPA filter, or the
pDR-1000AN Z -Pouch (standard accessory). In some cases, a very clean, well air –
conditioned office may offer a sufficiently low particle concentration environment
(i.e., ≤ 5 µg/m 3) for zeroing, as determined by another monitor (e.g., MIE DataRAM).
To zero the model pDR-1000AN by means of its Z -Pouch, proceed as follows:
• Wipe the outside surfaces of the pDR-1000AN to remove as much dust from those
surfaces as possible before placing the instrument inside the Z -Pouch.
• In a reasonably clean environment, open the zipper of the Z -Pouch and place the
pDR-1000AN inside it. Close the zipper shut.
• Open the small nipple on the Z -Pouch, and insert the fitting of the hand
pump/in -line filter unit into the nipple.
• Start pump ing the hand -pump until the Z -Pouch begins to bulge, and proceed
with the steps in Section 8.1, pressing the keys of the instrument through the wall
of the Z -Pouch. Then continue pumping.
• After completing the zeroing (step 2. of Section 8.1) procedure, ope n the Z -Pouch
zipper and remove the pDR-1000AN. Close the zipper and flatten the Z -Pouch
while plugging its nipple, in order to prevent dust contamination of the interior
of the Z -Pouch.
• The pDR-1000AN is now zeroed and ready for a measurement run.
6.5.2 Zeroin g the model pDR-1200
To provide the particle -free air required to zero the pDR-1200, either of two methods
can be used: a) place the instrument on a clean -air bench or in a clean room, or b)
connect to the cyclone inlet the green zeroing filter cartridge supplied with the pDR-
1200. In either case, proceed as follows:
• After implementing either of the two methods, above, run the attached pump for
at least one minute (e.g., at 4 liters/minute), and then proceed as described in
Section 8.1 of this instruction manual, while continuing to run the pump (or
leaving the unit in the clean air environment).
• Once the CALIBRATION: OK message appears on the pDR-1200 display, stop the
pump and disconnect the zeroing filter cartridge from the cyclone inlet (or
remove pDR-1200 from clean bench/room).
• The pDR-1200 is now zeroed and ready for a measurement run.
– 29 –
Note: While the pDR-1200 is used to monitor high dust concentrations ( ³
0.5 mg/m 3), the flow through its sensing chamber should not be
stopped before purging it, wh ich can be done by connecting the
green zeroing filter to the cyclone inlet and continuing to run the
pump for about 2 minutes before shutting it off. This is to prevent
dust contamination of the sensing chamber.
6.6 pDR-1200 Filter Holder Installation
The 37 -mm filter holder provided with the pDR-1200 must be installed before
operation of the instrument, in order to connect a sampling pump. To install the filter
holder, remove protective cover, and insert the open collar over the black attachment
cup wi th the external o -ring, on the left side of the pDR-1200 sensing chamber.
Ensure complete insertion.
To replace the membrane filter separate the two sections of the plastic holder prying
them apart with screwdriver or a coin. Make sure to place backing un der the
membrane filter before rejoining the two plastic rings.
7.0 OPERATING MODES
The personal DataRAM has several different operating modes which will be described
in what follows. The specific commands and displays within each of these operating
modes will be explained in detail in Section 8.0. A complete flow chart of keystrokes
and screens is provided in Section 16.0.
7.1 Start -Up Mode
The personal DataRAM enters the Start -Up Mode as soon as the instrument is
switched on. The user then has the choic e to:
a) Wait before proceeding;
b) Zero the instrument and check its readiness; or
c) Proceed directly to the Ready Mode.
7.2 Ready Mode
Once the personal DataRAM is in the Ready Mode, the user is presented with the
following alternatives:
a) Start a ru n immediately, or after any of the subsequent steps;
b) Review (by scrolling the display) all operating parameters, status and
diagnostic data;
c) Activate or deactivate the logging function; activate, select (instantaneous or
STEL), or deactivate alarm;
d) Program parameters or output logged data through a computer.
– 30 – 7.3 Run and Logging Mode
The Run Mode is the measurement/logging mode. The user can operate the
personal DataRAM in this mode either with or without data logging. For example, the
instrument m ay be used first as a survey monitor without logging, for walk -through
assessment of an industrial plant, before deciding where to set up the unit for
continuous monitoring and logging.
7.3.1 Data Logging
In order to activate the logging function, the un it must be in (or returned to) the
Ready Mode (see Section 8.2).
If data logging has been enabled, the data will be logged in the next free
(unrecorded) tag or data set. For example, if data had been recorded previously in
tags # 1, 2 and 3 then, when a n ew run is initiated, the new data will be stored in tag
#4. The data can be separated into number of sets (tags) up to a total of 99.
Any number of individual data points can be stored in a given tag, i.e. up to a
maximum of 13,000 points (i.e. the total memory capacity of the personal DataRAM)
assuming that no other data had been logged in other tags. This means that the total
memory capacity of 13,000 data points can be grouped into any number of the
available 99 data sets (tags).
7.3.2 Clearing of Memor y
Data recorded in the personal DataRAM memory can be erased either through an
external PC command using the MIE pDR-COM Custom Communications software
provided as a standard accessory, or resetting the instrument (see Section 8.5). The
PC method permits t o erase the data in any number of selected tags, whereas the
resetting method results in the deletion of all data stored in the personal DataRAM.
7.3.3 Run Mode Display and Commands
When a measurement run has been initiated (see Section 8.3), the user has the
following display choices:
a) Instantaneous and time -averaged concentrations (both on the same screen);
b) Elapsed run time, and run start time and date (both on the same screen);
c) Maximum displayed concentration from run start, and time/date at whi ch
current maximum occurred;
d) Short term excursion limit (STEL) from run start, and time/date at which
current STEL occurred;
e) Remaining battery charge, and (if logging function is enabled) remaining free
memory.
f) Analog output concentration range (i f enabled)
The user can command the termination of the run at any time returning it to the
Ready Mode. To download logged data into a PC, the personal DataRAM must be in
– 31 – the Ready Mode. No changes in the program parameters or operating conditions can
be ma de while in the Run Mode .
The personal DataRAM can be shut off from any of the three operating modes. Even if
shut off while in the Run Mode, the instrument will save all stored data.
8.0 OPERATION
8.1 Start -Up
KEY DISPLAY NOTES
1. ON/OFF START ZERO:ENTER Before starting a run with the
GO TO RUN: NEXT personal DataRAM, zero it (see Section
6.5) and key ENTER while
the unit is exposed to particle -free
air. Alternatively, key NEXT to go to
RUN/READY mode. If ENTER is
keyed:
2. ENTER ZEROING V2.00 Keep clean air flowing while
ZEROING is displayed* for 1.1 min.,
followed by one of these screens:
CALIBRATION: OK or,
BACKGROUND HIGH or,
MALFUNCTION If CALIBRATION: OK, then go to
step 3. If one of the other two screens
is displayed, consult Section 12.0.
3. NEXT START RUN: ENTER To start a measurement run
READY: NEXT key ENTER (Section 8.3, step 1). To
set up for a run and scroll logging/
operating parameters, key
NEXT (see Section 8.2).
4. ON/OFF TURN OFF PDR? Keying ON/OFF while the unit
Y:ENTER N:NEXT is operating will elicit this message to
prevent accidental shut off.
To confirm shut down, key
ENTER . To continue operation,
key NEXT .
*The number following the V on the screen refers to the installed firmware version.
– 32 –
8.2 Setting Up For A Run (Ready Mode)
KEY DISPLAY NOTES__________
1. NEXT LOGGING DISABLED This screen indicates the
logging status. To enab le
the logging function , key
ENTER . Toggling of the
on/off logging status can
be done by keying ENTER .
2. ENTER LOG INTRVL 600s This message indicates that logging is
TAG#: 4 enabled . Example is for 10 -min log
period, selected through the PC (see
Section 9.0), and next free tag is #4.
3. NEXT ALARM: OFF This screen indicates the
alarm status. Keying ENTER
repeatedly toggles through
the 3 alarm modes:
4. ENTER ALARM: INST ANT This enables the alarm based
LEVEL:1.50 mg/m3 on the real -time concentration.
The level (e.g. 1.50 mg/m3)
must be set on the PC.
5. ENTER ALARM: STEL This enables the alarm based
LEVEL:0.50 mg/m3 on the 15 -min STEL value.
The level (e.g. 0.50 mg/m3)
must be set on the PC.
6. NEXT ANALOG OUTPUT: This screen indicates the analog signal
DISABLED output status. Keying ENTER will
enable the analog output. Toggling
the analog output on/off can be done
by keying ENTER :
7. ENTER ANALOG OUTPUT: This enables the analog output. The
0 – 0.400 mg/m3 concentration range (e.g., 0 – 0.400
mg/m 3) must be set on the PC.
8. NEXT CAL FACTOR: 1.00 This screen displays the
DIS AVG TIME 10s calibration factor and the
display averaging time.
Both values can be edited via
PC.
– 33 –
9. NEXT BATTERY LEFT 83% This screen displays the
MEMORY LEFT 96% remaining battery charge, and the
remaining percentage of free memory.
10. NEX T CONNECT TO PC When this screen has been
selected, the operating
parameters can be edited
and/or the logged data can
be downloaded via the PC
(see Section 9.0). If NEXT
is keyed again, the screen
return s to RUN/READY:
11. NEXT START RUN: ENTER The instrument is now
READY: NEXT ready to run following the
procedure in section 8.3.
8.3 Measurement Run Procedure
KEY DISPLAY NOTES___________
1. ENTER LOGGING DISABLED or, if logging was enabled:
LOG INTRVL 600s Logging status will be displayed
TAG #: 4 for 3 seconds .
CONC*0.047 mg/m3 After a 3 -second delay , the concent –
TWA 0.039 mg/m3 ration screen appears (values
shown here are examples).
CONC is the real -time and TWA
is the time -averaged concent –
ration . The * appears only if
logging has been enabled .
2. EXIT TERMINATE RUN? To terminate the current run
Y:ENTER N:EXIT and return to the Ready Mode,
key ENTER . To continue the
run, key EXIT .
3. EXIT CONC*0.047 mg/m3 Keying NEXT successively
TWA 0.039 mg/m3 scrolls the display to show
various run values (elapsed
run time, maximum, STEL,
etc.). Keying EXIT from any
of tho se screens returns to
the concentration display.
– 34 –
4. NEXT ET 06:12:49 This screen shows the elapsed
ST 08:18:26MAY15 run time (ET) and the run
start time/date (ST).
5. NEXT MAX: 0.113 mg/m3 This screen shows the maximum
T 10:08: 44 MAY15 concentration of current run
and time/date of occurrence.
6. NEXT STEL:0.058 mg/m3 This screen shows the 15 -min
T 09:59:22 MAY15 STEL value of the current run
and the time/date of occurrence.
7. NEXT BATTERY LEFT 83% or, if logging was enabled:
BATTERY LEFT 83% This screen shows the amount
MEMORY LEFT 96% of usable charge left in the
battery and, if logging has
been enabled, the overall amount of
free memory left.
8. NEXT ANALOG OUTPUT: This screen shows the status of the
0 – 0.400 mg/m3 analog signal output, and the range,
if this output has been enabled.
9. NEXT CONC*0.047 mg/m3 The last NEXT command returns
TWA 0.039 mg/m3 the display to the concentration
screen.
10. EXIT TERMINATE RUN? As indicated in step 2, to end
Y:ENTER N:NEXT current run, key ENTER , to
return to the Ready Mode:
11. ENTER START RUN: ENTER This keystroke terminates the
READY: NEXT current run and returns the
unit to the Ready Mode.
If during a run the instrument memory is filled completely, or if all 99 tags have been
used, the run is automatically terminated and the display will indicate:
RUN TERMINATED
FULL MEMORY
If a new run is initiated after t he memory has been filled, the personal DataRAM can be
operated only as a monitor without logging. The memory must then be cleared (see
Section 7.3.2) first before logging can be enabled again.
– 35 –
8.4 Abbreviated Run Start/Stop Instructions
To power -up and start a measurement run without zeroing and without logging, proceed
as follows:
• Key sequentially ON/OFF , NEXT and ENTER .
To terminate run and shut down, proceed as follows starting from the concentration
screen (otherwise key EXIT first):
• Key sequ entially EXIT , ENTER, ON/OFF and ENTER .
8.5 Resetting Procedure
The personal DataRAM memory can be reset through commands entered on its own
keypad (i.e. without requiring a PC).
Resetting accomplishes the following:
• Erases all stored data from memory ;
• Resets all parameters and operating conditions to their default values and conditions;
and
• Cancels the zero correction offset.
WARRING : THE RES ET TEST WILL ERASE ALL DATA STORED IN MEMORY
AND SET ALL PARAMETERS TO FACTORY DEFAULT
SETTINGS . Down load any data before the reset procedure .
The procedure to reset the instrument is as follows:
Starting with the unit shut off, press the EXIT and ENTER keys at the same time, and
while holding down those two keys, press ON. The screen will then indicate:
PDR SELF -TEST… and several diagnostic screens will appear in rapid sequence (see
Section 16.0, Resetting/Electronics Checking Mode), ending in the message TE STING
COMPLETE. The unit will shut off . When turned on again, the personal DataRAM
memory will have been reset, as described above.
The default values and operating conditions of the personal DataRAM are:
• Logging period (LOG INTRVL): 60 seconds
• Logging status: disabled (LOGGING DISABLED)
• Alarm level: 1 mg/m 3
• Alarm status: disabled (ALARM: OFF)
• Analog output: 0 to 4 mg/m 3
• Analog output status: disabled (ANALOG OUTPUT :DISABLED)
• Real -time display averaging time (DIS AVG TIME): 10 seconds
– 36 – • Calibratio n factor (CAL FACTOR): 1.00
When turning on the personal DataRAM after resetting the instrument, it should be zeroed
(see steps 1. and 2. of Section 8.1) before a run is initiated. Otherwise, its internal optical
background level will not be subtracted fro m the indicated concentration readings.
Alternatively, if the instrument is not zeroed after resetting, it will indicate its
unsubtracted optical background when run under particle free conditions.
9.0 COMMUNICATIONS WITH COMPUTER
9.1 Hardware and Soft ware Requirements
The computer requirements to install the software provided with the personal DataRAM
(MIE pDR-COM) are the following:
• IBM -PC compatible
• 486 or better processor
• Minimum operating system: Windows 95™ or better
• ≥ 8 MB of RAM
• 2 MB hard disk drive
• 3.5" floppy drive
• VGA or higher resolution monitor
NOTE: When large files are logged in the personal DataRAM in one single tag, a
faster computer speed is required to handle the data. For example, if all
13,000 data points are logged i n one tag, a Pentium I or II processor with
a minimum speed of 166 MHz will be required. If, however, the
maximum number of data points per tag is 1,000 or below, a 33 MHz,
486 DX processor will suffice.
MIE custom hardware and software (provided as stand ard accessories):
• Digital communications cable (MIE model pDR-DCC)
• Software floppy disk (3.5", MIE model pDR-COM)
9.2 Software Installation Procedure
To install the MIE provided software in the computer, proceed as follows:
1. Insert the 3.5" disk labeled " pDR-COM" into computer.
2. For Windows 95™ users, select Start and then Run. For Windows 3.1 and 3.11
users, from Program Manager select File and then Run.
3. Type in on the Command Line : a: install (or b: install , as required).
4. The message " Do you wish to install pDR-COM? " will appear. Click OK to
continue, or Cancel .
5. A message appears allowing the option to change the default directory:
– 37 – "C:\PDRCOM ". It is advisable to leave the default directory (unless you address the
hard drive by a different letter), and select OK.
6. Afte r a successful installation, the message " Installation Complete! " will appear.
– 38 – 9.3 Communication Between personal DataRAM and Computer
To effect the communication between the personal DataRAM (via the pDR-COM
software installed in the computer as described in the preceding section) and the PC,
proceed as follows:
1. Connect the personal DataRAM to one of the computer's serial ports using the
pDR-DCC cable provided by MIE. This cable has a 9 -pin female connector for
the computer port.
2. Key ON the personal DataRAM and then key NEXT repeatedly until
CONNECT TO PC is displayed on the personal DataRAM.
3. On the computer, double click on the pDR-COM icon. A four -tabbed
notebook display should appear. Click on the Com Port Select and select the
port to which the pDR-DCC cable has been connected.
4. From the four -tabbed notebook displayed on the computer screen select the
tab with the desired option. The options are:
• Main : This page allows the user to input the personal DataRAM serial number
(or any other desir ed label), and select the Serial Com Port.
• Logged data : This page allows the user to download, tabulate, print data, or
transfer to a CSV file the data stored in the personal DataRAM. This page also
serves to display real -time numerical data when the co mputer is connected to
the personal DataRAM in the Run Mode.
• Graph data : This page enables the downloading and graphing of stored data
to the computer screen and to a printer. In the Run Mode, this page displays
the real -time data in graphic format.
• Configure pDR : This screen allows the user to edit the operating/logging
parameters. Click on the item to be edited and select or type in the new value.
To review the parameter values currently programmed into the
personal DataRAM, click on Get configurati on. After editing the parameters,
click on Set configuration to input the new values into the personal DataRAM
program.
Most operations within pDR-COM are self -evidently labeled, including fly -over
dialog boxes. In addition, instructions may be found in t he On -line Help files by
selecting Help and then Contents .
The following operating/logging parameters of the personal DataRAM are selected
(edited) via the computer:
• Current date (month and day of the month)
– 39 – • Current time (hour, minute and second)
• Display averaging time (1 to 60 seconds, in 1 -second increments)
• Calibration factor (0.01 to 9.99, in 0.01 increments)
• Logging interval (1 to 14,400 seconds, in 1 -second increments)
• Analog output full scale concentration (0.1, 0.4, 1, 4, 10, 40, 100, o r 400 mg/m 3)
• Analog output status (enabled, or disabled) (can also be selected directly
through personal DataRAM keyboard, see Section 8.2)
• Alarm level (0.001 to 409.599 mg/m 3, in 1 -µg/m 3 increments)
• Alarm mode (Off, Instantaneous, or STEL) (can also be selected directly
through personal DataRAM keyboard, see Section 8.2)
The serial number of the personal DataRAM is transferred automatically to the PC and
displayed on its screen.
In addition, the user can input any other identification for the instrume nt (up to 20
characters).
Note: The year is entered as a two -digit number; year 2000 is treated correctly as
a leap year ( personal DataRAM version 1.70 or higher).
9.4 Real -Time RS -232 Output
During the RUN mode, the personal DataRAM can communicate real -time
concentration data through its serial port via the pDR-COM software package. This
software application decodes the data and displays it on the computer screen in both
graphical and tabulated form.
In order to use this output with some other applicati on, the following information
will enable the user to decipher the encoded output signal.
The communication settings for the digital output of the personal DataRAM are:
• Baud rate: 4800 bps or 9600 bps
• Data bits: 8
• Stop bits: 1
• Parity: none
• Flow control: Xon/Xoff
Every second during a run, the personal DataRAM serial port will output a sixteen –
character code. It consists of two brackets with 14 hexadecimal digits between them,
representing sum check (2 digits), sensed concentration (8 digits), an d calibration
factor (%, 4 digits). The concentration in µg/m 3 is obtained by multiplying the
sensed concentration times the calibration factor and dividing by 100.
– 40 –
10.0 ANALOG SIGNAL OUTPUT
10.1 Analog Output Description
The personal DataRAM incorporates the capability to provide both a voltage and a
current signal output directly proportional to the sensed concentration of airborne
particulates. Both these analog signal outputs are concurrently available. These
outputs are provided, principally, for fixed -point applications with hard -wired
installations, such as for continuous HVAC monitoring and control.
The particulate concentration range corresponding to the output voltage and current
ranges (0 to 5 V and 4 to 20 mA) can be user selected (via a PC). Th e most sensitive
range available is 0 to 0.100 mg/m 3, and the least sensitive range is 0 to 400 mg/m 3.
For example, if the user selects the analog output range of 0 to 0.400 mg/m 3 then the
analog output signal levels, at a concentration of 0.200 mg/m 3, wou ld be 2.5 V and
12 mA.
Selection of the concentration range of the analog output must be performed on the
PC. This range is independent of the digital display, data logging and real -time
digital output range which are controlled automatically (auto -rangin g).
Enabling the analog output increases the current consumption from the power
source (battery or power supply) of the personal DataRAM by typically 5 mA when no
load is connected to the analog signal current output. If such a load is connected
then the c urrent consumption of the personal DataRAM further increases by the
magnitude of the output signal current (up to a maximum increment of 20 mA).
Therefore, when not using the analog output, it is advisable to disable that output
(see Section 8.2) in order t o minimize power consumption (this is important only
when powering the personal DataRAM from a battery source).
10.2 Analog Output Connection
The personal DataRAM is provided with a cable (model pDR-ANC) which has a 6 –
contact plug at one end and flying le ads at the other. There are 4 leads for the analog
and alarm outputs. The additional two contacts of the connector are used only for
digital communication with a PC, for which a separate cable (model pDR-DCC) is
provided.
Counting from top to bottom on the personal DataRAM connector receptacle, contact
#1 is the positive 4 – 20 mA analog output, contact #2 is the alarm output, contact #5
is the common ground (return for all signals), and contact #6 is the positive 0 – 5 V
analog output.
For the 0 – 5 V o utput signal, the externally connected load must have an impedance
of more than 200 kilo -ohms. For the 4 – 20 mA output signal, the externally
connected load must have an impedance of less than 200 ohms when powering the
– 41 – personal DataRAM with a battery, or less than 300 ohms when using the its AC
supply.
Since both voltage and current outputs are present at the same time, both can be used
concurrently, if so required.
The accuracy of the analog output signals is better than 1% of the reading with
respect to the digital reading.
11.0 ALARM
11.1 Alarm Description and Operation
The personal DataRAM alarm function is provided both as an audible signal as well as
an electrical output. The audible alarm consists of a series of beeps generated by an
on-boar d piezo -transducer. The electrical output, available at the digital
communications port, consists of a 1 Hz square wave signal which can be used to
trigger/activate other equipment through an appropriate interface (consult with the
factory).
The alarm fun ction can be enabled/disabled by the user through the
personal DataRAM keyboard (see Section 8.2). Setting of the alarm level must be
performed on the PC (see Section 9.0).
The alarm is triggered whenever the preset alarm level is exceeded based either on :
a) the displayed real -time concentration, if ALARM: INSTANT was selected (see
Section 8.2), or b) a 15 -minute running average concentration, if ALARM: STEL was
selected. When the concentration falls below that level the alarm condition stops.
While the a larm is on the user can stop it (i.e. silence the alarm) by pressing any key
of the personal DataRAM. If the concentration continues to exceed the set alarm level
after 10 seconds, however, the alarm restarts.
11.2 Alarm Output
A pulsed voltage output is available on the personal DataRAM in synchronism with
the audible signal. This signal consists of a 1 Hz square wave with an amplitude
level of 5 V pp. An externally connected load should have an impedance of no less
than 100 kilo -ohms. This alarm output si gnal is available at pins 2 and 5 (counting
from top to bottom) of the 6 -contact output/communications port on the side of the
personal DataRAM (see Figure 5 or 6).
11.3 Remote Alarm Unit
An alarm relay unit (MIE model pDR-RA) is available as an optional accessory for
the personal DataRAM. The pDR-RA, when connected to the alarm output of the
personal DataRAM, provides a switched output triggered by the alarm signal of the
monitor. This switched output (up to 8 amperes, 250 volts) can be used to activate or
– 42 – deactivate other equipment (e.g. ventilation systems, machinery, etc.), or to control
remotely located (by wire connection) alarm indicators (e.g. buzzers, lights, etc.).
12.0 MAINTENANCE
12.1 General Guidelines
The personal DataRAM is designed to be rep aired at the factory. Access to the internal
components of the unit by others than authorized personnel voids warranty. The
exception to this rule is the occasional cleaning of the optical sensing chamber.
Unless a MALFUNCTION message is displayed, or o ther operational problems
occur, the personal DataRAM should be returned to the factory once every two years
for routine check out, test, cleaning and calibration check.
12.2 Cleaning of Optical Sensing Chamber
Continued sampling of airborne particles may result in gradual build -up of
contamination on the interior surfaces of the sensing chamber components. This
may cause an excessive rate of increase in the optical background. If this
background level becomes excessive, the personal DataRAM will alert th e user at the
completion of the zeroing sequence, as indicated in Section 8.1, by the display of a
BACKGROUND HIGH message. If this message is presented, the personal DataRAM
can continue to be operated providing accurate measurements. However, it is then
advisable to clean the interior of the sensing chamber at the first convenient
opportunity, proceeding as indicated below.
12.2.1 Model pDR-1000AN
• Remove the two screws on the top of the large protective bumper that covers the
sensing chamber (see Figure 1);
• Remove the large protective bumper by lifting it firmly upwards and away from
the sensing chamber;
• Remove the socket -head screws on the front and back black covers that were
exposed by removal of the large top bumper. Lift away the freed front and back
cove rs of the sensing chamber; set them aside carefully and such that they can be
reattached in the same position as they were previously; avoid touching the dull
black side of these plates;
• Using filtered (particle -free) pressurized air, blow the inside of th e sensing
chamber taking great care in not marring or scratching any of the exposed
surfaces;
• Reposition the two sensing chamber cover plates in the same location (front and
back) as they had been originally. Insert and tighten socket head screws firmly
making sure that the two plates are aligned perfectly with the top of the sensing
chamber;
– 43 – • Reposition large protective bumper over sensing chamber pushing down until
properly seated. Insert the two top screws holding down the bumper and tighten
gently (do no t over -tighten);
• Check optical background by zeroing the pDR-1000AN as indicated in Section 8.1.
If the sensing chamber cleaning was performed correctly, the message
CALIBRATION: OK should be displayed at the end of the zeroing period.
12.2.2 Model pDR-1200
• Rem ove the two screws (one in the front and one in the back) holding the front
and back gasketed covering plates of the sensing chamber, and set these plates
aside, such that they may be reattached in the same location as they were
previously.
• Using filtered (particle -free) pressurized air, blow the inside of sensing chamber
taking great care in not marring or scratching any of the exposed surfaces.
• Reposition the two sensing chamber cover plates in the same location (front and
back) as they had been originall y. Insert and tighten socket head screws firmly
making sure that the two plates are aligned perfectly with the top of the sensing
chamber.
• Check optical background by zeroing the pDR-1200 as indicated in Section 8.1. If
the sensing chamber cleaning was per formed correctly, the message
CALIBRATION: OK should be displayed at the end of the zeroing period.
12.3 Cyclone Cleaning (Model pDR-1200 only)
The cyclone will require occasional cleaning. It is advisable to do so whenever the
sensing chamber of the pDR-1200 is cleaned (see above). To clean the cyclone,
remove it from its black attachment cup on the sensing chamber, and unscrew the
grit pot (narrower knurled end). Use clean pressurized air to blow out the grit pot
and through all openings of cyclone body . Reattach grit pot to cyclone body and
insert cyclone body into attachment cup making sure it is fully inserted.
13.0 CALIBRATION
13.1 Factory Calibration
Each personal DataRAM is factory calibrated against a set of reference monitors that,
in turn, are periodically calibrated against a gravimetric standard traceable to the
National Institute of Standards and Testing (NIST).
The primary factory reference method consists of generating a dust aerosol by means
of a fluidized bed generator, and injecting co ntinuously the dust into a mixing
chamber from which samples are extracted concurrently by two reference filter
collectors and by two master real -time monitors (MIE DataRAMs) that are used for
the routine calibration of every personal DataRAM.
– 44 – The primary dust concentration reference value is obtained from the weight increase
of the two filters due to the dust collected over a measured period of time, at a
constant and known flow rate. The two master real -time monitors are then adjusted
to agree with the r eference mass concentration value (obtained from averaging the
measurements of the two gravimetric filters) to within ±1%.
Three primary, NIST traceable, measurements are involved in the determination of
the reference mass concentration: the weight increm ent from the dust collected on
the filter, the sampling flowrate, and the sampling time. Additional conditions that
must be met are: a) suspended dust concentration uniformity at all sampling inlets of
the mixing chamber; b) identical sample transport con figurations leading to
reference and instrument under calibration; and c) essentially 100% collection
efficiency of filters used for gravimetric reference for the particle size range of the
test dust.
The test dust used for the MIE factory calibration of the personal DataRAM is SAE
Fine (ISO Fine) supplied by Powder Technology, Inc. It has the following physical
characteristics (as dispersed into the mixing chamber):
• Mass median aerodynamic particle diameter: 2 to 3 µm
• Geometric standard deviation of lo gnormal size distribution: 2.5
• Bulk density: 2.60 to 2.65 g/cm 3
• Refractive index: 1.54
13.2 Field Gravimetric Calibration
If desired, the personal DataRAM can be calibrated gravimetrically for a particular
aerosol (dust, smoke, mist, etc.) under field conditions (actual conditions of use).
To effect such calibration in the particle environment of interest, proceed as indicated
below.
For field calibration of the model pDR-1000AN, a personal type filter sampler is
placed side -by-side (collocated) to th e pDR-1000AN to be calibrated, and the two
units should be started simultaneously. For the model pDR-1200, its own filter and
attached pump can be conveniently used for the same purpose.
• Weigh and load into filter holder a fresh membrane filter.
• Start pu mp.
• Immediately turn on personal DataRAM and start a run such that the pump
and the personal DataRAM are started nearly simultaneously.
The duration of this comparison run should be sufficient to collect a mass of at least 1
mg on the reference filter (in o rder to permit accurate weighing of the collected mass
by means of an analytical balance). The time -weighted average (TWA) reading of the
personal DataRAM can be used to estimate the required sampling time to collect the
above -mentioned mass on the filter. To estimate the required sampling time (ET as
measured on the personal DataRAM) in minutes, read the TWA value (see Section 8.3)
– 45 – after an elapsed time (ET) of one minute or more, and apply the following
relationship:
ET ≥ 500/TWA
For example, if TWA = 2. 5 mg/m 3, then ET ≥ 200 minutes (approximately 3 hours).
If the TWA value changes significantly as the run proceeds, recalculate the required
ET accordingly.
At the end of the run (after time ET has elapsed), record TWA, ET and the flow rate
Q used to samp le the air. Weigh the filter on an analytical balance and obtain Δm, the
mass increment due to the collected particles.
Calculate the average gravimetric concentration C, as follows:
C = 1000 Δm/ETxQ
Compare the recorded value of TWA and the calculated value C, and calculate the
calibration factor to be programmed into the personal DataRAM (see Section 9.0) as
follows:
CAL FACTOR = C/TWA
For example, if C was found to be 3.2 mg/m 3, and TWA had been determined to be
2.5 mg/m 3, the CAL FACTOR equals 1.28 . Select this value on the PC, as described
in Section 9.0. This completes the gravimetric calibration of the personal DataRAM for
a specific aerosol.
13.3 Scattering Coefficient Calibration
Users interested in using the personal DataRAM for scattering co efficient
measurements (e.g., for atmospheric visibility monitoring) should contact the
factory. A special primary Rayleigh scattering calibration for such purpose can be
performed by the factory.
13.4 Internal Span Check
The zeroing procedure (see Secti on 8.1) and the resulting normal diagnostic display
of "CALIBRATION: OK" (step 2) informs the user that the instrument's calibration
agrees with the original factory setting. This is an internal span check that consists of
an automatic comparison between t he initial (factory) optical background of the
personal DataRAM (registered in its non -volatile memory), and the current optical
background sensed during the zeroing sequence.
14.0 PARTICLE SIZE CLASSIFICATION (model pDR-1200 only)
– 46 – The particle size selec tive cyclone of the pDR-1200 provides the user with two
important capabilities: a) to measure the particulate matter concentration of a specific
aerodynamic size fraction, and b) to determine the mass median size of a particle
population. These two applica tions will be discussed in what follows. For both these
applications, a variable measured flow rate pump is required, such as the model
pDR-PU (for which a separate instruction manual is provided).
14.1 Size Fractionated Monitoring
The pDR-1200 can be us ed to monitor a specific particle size fraction below a
selectable cut off equivalent aerodynamic diameter. The particle size cut point can be
selected by adjustment of the sampling flow rate. The higher this flow rate through
the cyclone the smaller the c ut off particle diameter. Figure 7 is a graph showing the
dependence of the particle cut off size in micrometers as a function of the sampling
flow rate in liters per minute. The cut off size is the particle aerodynamic diameter at
which the collection eff iciency of the cyclone is 50%, or conversely, the size at which
the cyclone transmission is 50%. For example, to obtain a particle size cut off of 2.5
µm (i.e., PM 2.5), the required sampling flow rate is 4 liters/minute. A that flow rate
only particles sma ller than (approximately) 2.5 µm are allowed to pass into the pDR-
1200 sensing stage, to be monitored and then to be collected on the filter.
As can be seen on Fig. 7, the lowest particle size cut for the GK 2.05 cyclone included
with the pDR-1200 is abou t 1 µm, and the largest is about 12 µm. For particle size
classification outside this range, consult with the factory.
14.2 Particle Sizing
The selectable particle size capability of the cyclone, in combination with the
concentration measuring capabilit y of the photometric system of the pDR-1200
permits the user to determine the mass median aerodynamic particle diameter of an
aerosol, i.e., of the airborne particle population being sampled.
One simple procedure to determine the median particle size is a s follows (please
refer to the graph of Fig. 7):
• Remove cyclone from its black attachment cup and set cyclone aside
• Start pump and sample aerosol at a flow rate between 2 and 4 liters/minute
• Press ON key on pDR-1200 panel and after about one minut e key NEXT and
then ENTER
• After an elapsed time (ET) of about one minute, read and note TWA
concentration
•Shut off pump
– 47 –
– 48 – • Plug in cyclone into its attachment cup
• Start pump and run at about 1 liter/minute. Observe real -time concentration
(CONC) re ading
• Increase flow rate very slowly and gradually until CONC reading is one -half
of the initial concentration measured without the cyclone. Continue sampling
at this flow rate for about one minute and confirm that TWA reading is about
one-half of the initial one. Otherwise readjust flow rate. Note final flow rate at
which the TWA value has decreased to one -half the value noted without the
cyclone.
• Enter the final flow rate for which the TWA value is one -half of the initial
value into the graph of Fi g. 7 and read the corresponding d 50 particle size in
micrometers. This represents the mass median particle diameter of the
aerosol.
For example, if the TWA value without the cyclone was 0.8 mg/m 3, and the flow rate
(with the cyclone attached) required to reduce the TWA to 0.4 mg/m 3 is 2
liters/minute, the mass median particle size (as obtained from the curve of Fig. 7) is
approximately 5.5 µm.
15.0 CONVERSION BETWEEN personal DataRAM VERSIONS
The personal DataRAM user has the option to convert from a mod el pDR-1000AN to a
model pDR-1200 or vice versa using the appropriate conversion kit. To convert from a
pDR-1000AN to a pDR-1200 (i.e., from a passive air sampling configuration to an
active one), the user requires the model pDR-ASC conversion kit. To conve rt from a
pDR-1200 to a pDR-1000AN (i.e., from an active air sampling configuration to a
passive one), the user requires the model pDR-UB conversion kit.
15.1 Conversion Procedure From pDR-1000AN to pDR-1200
To effect this conversion, use model pDR-ASC c onversion kit. As you remove
parts from the pDR-1000AN, in order to attach the conversion kit components,
store these parts carefully for possible future re -conversion. Proceed as follows:
• Remove the two screws on the top of the large protective bumper that covers
the sensing chamber (see Figure 1). This bumper is not used on the pDR-1200;
• Remove the large protective bumper by lifting it firmly upwards and away
from the sensing chamber;
• Reinsert in the upper two threaded holes and tighten the two screws that had
held the protective bumper;
• Remove the socket -head screws on the front and back black covers that were
exposed by removal of the large top bumper. Lift away the freed front and
back covers of the sensing chamber; store them carefully for future u se,
ensuring that their surfaces are not scratched or marred;
– 49 – • Position one of the two gasketed (soft rubber) sensing chamber cover plates
provided in the conversion kit on the front side of the sensing chamber. Insert
and tighten the included socket head s crew firmly making sure that the plate
is aligned perfectly with the top of the sensing chamber. Similarly, attach the
other cover plate on the back side of the sensing chamber;
• Identify the two black cups of the pDR-ASC conversion kit. One of them has
an external o -ring (filter holder cup), and the other has no o -ring (cyclone
cup); refer to Figures 2 and 4 for the location of these cups on the pDR-1200
sensing chamber. These cups can be installed on either side of the sensing
chamber, i.e., the cyclone ca n be either on the left or the right side of the
sensing chamber (Figure 2 shows the case where the cyclone is on the right
side);
• Attach one cup to the left side of the sensing chamber using the two black
socket head screws. Tighten screws firmly. Similar ly, attach the other cup to
the right side of the sensing chamber;
• Take the cyclone/filter holder unit provided as part of the conversion kit, and
separate the 37 -mm plastic filter holder from the metal cyclone by firmly
pulling the two units apart;
• Carefu lly slide the large open end of the plastic filter holder over the cup with
the external o -ring, previously attached to the sensing chamber. Ensure that
the cup is fully inserted into the filter holder;
• Carefully insert the large diameter open end of the m etal cyclone into the
other cup on the opposite side of the sensing chamber. The cyclone inlet
(small short metal tube on side of cyclone) can be oriented as desired
(upwards, as shown in Figure 2, sideways, downwards, etc.). Ensure that the
cyclone is ful ly inserted into the cup;
• When ready to operate, connect a length of tubing between the barbed fitting
at the downstream end of the plastic filter holder and the pump to be used in
combination with the pDR-1200.
• Perform a zeroing sequence (see Sections 6.5 .2 and 8.1) before starting a run.
This completes the conversion of the pDR-1000AN to the pDR-1200.
15.2 Conversion Procedure from pDR-1200 to pDR-1000AN
To effect this conversion use model pDR-UB conversion kit. As you remove parts
from the pDR-1200, in order to attach the conversion kit components, store these
parts carefully for possible future re -conversion. Proceed as follows:
• Pull off both the cyclone and the filter holder from their respective cups on the
two sides of the sensing chamber;
• Loosen t he two screws that hold each of the two cups on the sides of the
sensing chamber (total of 4 screws), and remove the two side cups;
• Loosen the single screw on each of the two (front and back) gasketed sealing
covers enclosing the sensing chamber, and remov e the two covers;
– 50 – • Identify the two flat sensing chamber cover plates provided in the conversion
kit; one face of each of each of these two plates has a dull black finish
(antireflective); avoid touching those surfaces;
• Position one of the two sensing cham ber cover plates over the open front of
the sensing chamber with the dull surface on the inside, and such that the hole
in the plate is aligned with the corresponding threaded mounting hole on the
upper wall of the sensing chamber. Insert and tighten firml y black socket head
screw provided with the conversion kit, making sure that the plate is aligned
perfectly with the top of the sensing chamber. Similarly, attach the other
cover plate to the rear of the sensing chamber, with the dull surface facing
inwar d;
• Loosen and remove the two small screws on the top surface of the sensing
chamber;
• Position large protective bumper (provided in the conversion kit) over sensing
chamber pushing down until properly seated. Insert the two top screws (two
shiny Phillips -head screws provided in the conversion kit) Into the two holes
In the bumper while holding down the bumper, and tighten gently (do not
over -tighten) making sure that the heads of these screws are well Inside their
cavities In the bumper;
• Perform a zeroing s equence (see Sections 6.5.1 and 8.1) before starting a run.
This completes the conversion from a pDR-1200 to a pDR-1000AN.
– 51 – 16.0 SEQUENCE OF KEYSTROKES AND SCREENS
(pDR-1000 AN, -1200, HPM -1000)
Start -Up and Survey Run Mode ( Without Data Logging)
ON/OFF
START ZERO:ENTER
GO TO RUN: NEXT
(Use Zeroing Kit here) ENTER NEXT
ZEROING V 2.00
73 sec. Start -Up
CALIBRATION: OK Mode
NEXT
START RUN: ENTER
READY: NEXT
ENTER
LOGGING DISABLED
5 sec.
CONC 0.047 mg/m3
TWA 0.039 mg/m3
EXIT NEXT
TERMINATE RUN? ET 06:12:49
Y:ENTER N:NEXT ST 08:18:26MAY15
ENTER NEXT EXIT NEXT
START RUN: ENTER MAX: 0.113 mg/m3
READY: NEXT T 10:08:44 MAY15 Run Mode
ON/OFF EXIT NEXT (logging
STEL:0.058 mg/m3 disabled)
T 09:59:22 MAY15
EXIT NEXT
BATTERY LEFT 83%
EXIT NEXT
ANALOG OUTPUT:
0 – 4.000 mg/m3
NEXT
CONC 0.044 mg/m3
TWA 0.040 mg/m3
ON/OFF
TURN OFF PDR?
Y:ENTER N:NEXT
ENTER NEXT
(power off) CONC 0.036 mg/m3
TWA 0.039 mg/m3
– 52 –
Start -Up, Set -Up and Run Mode ( With Data Logging)
ON/OFF
START ZERO:ENTER
GO TO RUN: NEXT
(Use Zeroing Kit here ) ENTER NEXT
ZEROING V 1.00
Start -Up
73 sec. Mode
CALIBRATION: OK
NEXT
START RUN: ENTER
READY: NEXT
NEXT
LOGGING DISABLED
ENTER
LOG INTRVL 600s
TAG#: 4
NEXT
ALARM: OFF
ENTER
ALARM: INSTANT
LEVEL:0.50 mg/m3
NEXT ENTER
ALARM: STEL Set-Up
LEVEL:0.50 mg/m3 (Ready)
NEXT Mode
ANALOG OUTPUT
0 – 4.000 MG/M3
NEXT
CAL FACTOR: 1.00
DIS AVG TIME 10s
NEXT
BATTERY LEFT 83%
MEMORY LEFT 96%
NEXT
CONNECT TO PC
NEXT
START RUN: ENTER
READY:NEXT
(Continues on next page)
– 53 – ENTER
LOG INTRVL 600s
TAG#: 4
5 sec.
CONC*0.047 mg/m3
TWA 0.039 mg/m3
CONC*0.054 mg/m3
TWA 0.041 mg/m3
EXIT NEXT
TERMINATE RUN? ET 06:12:49
Y:ENTER N:NEXT ST 08:18:26MAY15
ENTER NEXT EXIT NEXT Run Mode
START RUN: ENTER MAX: 0.113 mg/m3 (logging
READY: NEXT T 10:08:44 MAY15 enabled)
ON/OFF EXIT NEXT
STEL:0.058 mg/m3
T 09:59:22 MAY15
EXIT NEXT
BATT ERY LEFT 83%
MEMORY LEFT 96%
EXIT NEXT
ANALOG OUTPUT:
0 – 4.000 mg/m3
NEXT
CONC*0.044 mg/m3
TWA 0.040 mg/m3
ON/OFF
TURN OFF PDR?
Y:ENTER N:NEXT
ENTER NEXT
(power off) CONC*0.036 mg /m3
TWA 0.039 mg/m3
– 54 – Resetting/Electronic Checking Mode
EXIT + ENTER
+
ON/OFF
PDR SELF -TEST…
TESTING ALARM
PDR SELF -TEST…
TESTING SERIAL
PDR SELF -TEST…
TESTING CLOCK
PDR SEL F-TEST… Automatic
TESTING A/D Sequence
(30 – 40 sec.)
PDR SELF -TEST…
TESTING D/A
PDR SELF -TEST…
TESTING MEMORY
PDR SELF -TEST…
TESTING COMPLETE
(automatic power off)
NOTE: After the preceding resetting sequence, the instrument should be
zeroed; otherwise its optical background will remain unsubtracted.
When the Error Message “Malfunction ” displays
In the event that the PDR s eries instrument displays the error message
“Malfunction ” here are two steps that should be taken by the owner/ operator.
With unit attached to the comp uter, proceed as follows:
Check the minimum background of the unit. To do this you n eed to utilize pDR –
COM software (PDRCOM.EXE ) loaded into your computer. Click on `Configure
pDR’. Click on `Get Configuration ’. Press both the “ALT” key and the letter “B”
key of the computer keyboard and the following message will be displayed:
Waring! Consult the manufacturer before editing MinBG, MaxBG or the
Serial Number.
Click on the `OK ’ box and you should see S/N, MinBG, MaxBG boxes . Set the
MinBG to 100 and click on `Set Configuration ’. Click on `O K’ then exit program.
Now try zeroing the pDR. Alternatively try to Reset as outlined in se ction 8.5 of
this manual.
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