Rae MultiRAE PLUS PGM-50 Operation And Maintenance Manual
MultiRAE PLUS
MULTI-GAS MONITOR
PGM-50
OPERATION AND MAINTENANCE
MANUAL
(Document No.: 008-4001)
Rev. G
RAE SYSTEMS INC.
1339 Moffett Park Drive
Sunnyvale, CA 94089
October 2001
RAE Systems Product Line
§ Gas Detection Tubes & Pumps
§ SampleRAE Electronic Sampling Pump
§ MultiRAE PLUS Multi-gas Monitors
§ MultiRAE IR Multi-gas Monitors w/CO2
§ MultiRAE Confined Space Monitor
§ QRAE PLUS Multi-gas Monitors
§ QRAE Confined Space Monitor
§ VRAE Five-Gas Monitors
§ DRAE Two-Gas Monitors
§ MiniRAE 2000 Portable VOC Monitor (PID)
§ ppbRAE Portable ppb-Level VOC Monitor (PID)
§ UltraRAE Specific Compound Monitor
§ CDRAE Corona Discharge VOC Monitor
§ ToxiRAE PLUS PID Monitor
§ ToxiRAE PLUS Single Gas Monitors
§ ToxiRAE PLUS Oxygen Monitor
§ ToxiRAE PLUS Combustible Gas Monitor
§ MiniRAE PLUS Classic PID
§ ModuRAE Fixed System PID
§ AreaRAE Wireless Multi-point, Multi-gas Detection
Systems
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Table of Contents
1. GENERAL INFORMATION.......................................1-1
1.1 General Specifications...........................................1-2
2. OPERATION OF MULTIRAE PLUS.........................2-1
2.1 Physical Description..............................................2-2
2.2 Keys and Display....................................................2-4
2.3 Power On/Off.........................................................2-7
2.4 Operations.............................................................2-10
2.5 Alarm Signals........................................................2-17
2.6 Back Light.............................................................2-20
2.7 Preset Alarm Limits and Calibration..................2-21
2.8 Integrated Sampling Pump...................................2-22
2.9 Datalogging...........................................................2-24
3. OPERATION OF ACCESSORIES..............................3-1
3.1 Battery Charging Operation...................................3-2
3.2 Alkaline Battery Adapter........................................3-4
3.3 Water Trap Filter....................................................3-5
3.4 Remote Sampling Probe or Tygon Tubing...........3-6
3.5 Dilution Fitting.......................................................3-7
3.6 Calibration Adapter................................................3-8
4. PROGRAMMING OF MULTIRAE PLUS...............4-1
4.1 Programming Mode ...............................................4-2
4.2 Keys for Programming Mode ...............................4-4
4.3 Entering into Programming Menu........................4-5
4.4 Calibration of MultiRAE PLUS Monitor.............4-7
4.4.1 Fresh Air Calibration.......................................4-10
4.4.2 Multiple Sensor Calibration..............................4-11
4.4.3 Single Sensor Calibration.................................4-14
4.4.4 Modify Span Gas Value...................................4-17
4.4.5 Change LEL/VOC Span Gas...........................4-18
4.5 Change Alarm Limits...........................................4-20
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4.6 View or Change Datalog......................................4-22
4.6.1 Reset Peak and Minimum ................................4-23
4.6.2 Clear All Data 4-24
4.6.3 Change Datalog Period....................................4-25
4.6.4 Select Data Type.............................................4-26
4.6.5 View Datalog..................................................4-27
4.6.6 Enable / Disable Datalog..................................4-28
4.7 Change Monitor Setup.........................................4-29
4.7.1 Change Site ID 4-30
4.7.2 Change Alarm Mode.......................................4-31
4.7.3 Change User Mode.........................................4-32
4.7.4 Change Real Time Clock.................................4-33
4.7.5 Change Back Light Mode................................4-34
4.7.6 Change Password............................................4-35
4.7.7 Change Pump Speed.......................................4-36
4.7.8 Change Averaging Method ..............................4-37
4.8 Change Sensor Configuration..............................4-38
4.8.1 Change LEL/VOC Gas Selection.....................4-40
4.8.2 Enable / Disable Sensor...................................4-44
4.8.3 Change Dilution Ratio ......................................4-45
4.8.4 Change PID Lamp Type..................................4-46
4.9 Exit Programming Mode .....................................4-47
5. COMPUTER INTERFACE
FOR MULTIRAE PLUS...........................................5-1
5.1 Install ProRAE-Suite Software.............................5-2
5.2 Connect MultiRAE PLUS to PC...........................5-4
5.3 Start ProRAE-Suite Software................................5-4
5.4 Setup Communication Port...................................5-7
5.5 Processing the Configuration Data.......................5-8
5.5.1 Editing the Configuration Data............................5-9
5.5.2 Send Configuration to MultiRAE Plus...............5-21
5.5.3 Saving Configuration Data................................5-22
5.5.4 Configuring All Settings....................................5-23
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5.6 Processing the Logged Data................................5-24
5.6.1 Receive Data from MultiRAE PLUS ................5-25
5.6.2 View Logged Data in Text Mode.....................5-26
5.6.3 View STEL/TWA/AVG Value ........................5-28
5.6.4 View Summary Information ..............................5-29
5.6.5 View Logged Data in Graph Mode..................5-30
5.6.6 Export the Displayed Data to a Text File..........5-34
5.6.7 Export Graphic to a File...................................5-35
5.6.8 Print the Logged Data......................................5-36
5.7 Upgrade the Datalog Option................................5-37
5.8 Upgrade the Firmware..........................................5-39
6. THEORY OF OPERATION.........................................6-1
7. MAINTENANCE............................................................7-1
7.1 Battery Replacement..............................................7-2
7.2 Sensor Replacement...............................................7-4
7.3 PID Sensor Cleaning / Replacement.....................7-7
7.4 PID Lamp Care.......................................................7-9
7.5 Sampling Pump Replacement..............................7-11
8. TROUBLESHOOTING.................................................8-1
8.1 Special Diagnostic Mode.......................................8-2
8.2 Troubleshooting Table.........................................8-10
APPENDIX A. QUICK REFERENCE GUIDE.............A-1
APPENDIX B. CORRECTION FACTORS...................B-1
APPENDIX C. MULTIRAE PLUS DATA
CONVERSION TO MICROSOFT EXCEL.............C-1
APPENDIX D. RAE SYSTEMS TECHNICAL
NOTES..............................................................................D-3
APPENDIX E. RAE SYSTEMS APPLICATION
NOTES..............................................................................E-1
APPENDIX F. LITERATURE REQUEST.....................F-1
APPENDIX G. REQUEST FOR RETURN
AUTHORIZATION FORM..........................................G-1
Main Contact Numbers..........................Outer Back Cover
iv
! WARNING !
- DO NOT proceed before reading -
This manual must be carefully read by all
individuals who have or will have the responsibility
for using, maintaining, or servicing this product.
The product will perform as designed only if it is used,
maintained, and serviced in accordance with the
manufacturer's instructions.
CAUTION!!
To reduce the risk of electric shock, turn off power
before removing the monitor cover. Disconnect
the battery before removing sensor module for
service. Never operate the monitor while the cover
is removed. Remove monitor cover and sensor
module only in an area known to be nonhazardous.
The model PGM-50 equipment is classified as to
intrinsic safety for use in class I, division 1, groups
A, B, C, D, or non-hazardous locations only.
v
Special Note
-1-
When the PGM-50 Multi-gas Monitor is taken out from
the transport case and turned on for the first time, there
may be some residual organic or inorganic vapor
trapped inside the detector chamber. The initial PID or
toxic sensor reading may indicate a few ppm. Ensure an
area free of organic or toxic vapor and turn on the
monitor. After running for several minutes, the residual
vapor in the detector chamber will be cleared and the
reading should return to zero.
-2-
The battery of the MultiRAE PLUS monitor will
discharge slowly even if it is turned off. If the monitor
has not been charged for 5-7 days, the battery voltage
will be low. Therefore, it is a good practice to always
charge the monitor before using it. It is also
recommended to fully charge the monitor for AT LEAST
10 HOURS before initial use (see Section 7 for more
information on battery charging and replacement).
vi
WARNINGS:
Use only RAE Systems battery packs, part Nos. 500-
0028, 500-0029, or 500-0039. This instrument has
not been tested in an explosive gas/air atmosphere
having an oxygen concentration greater than 21%.
Substitution of components may impair intrinsic
safety. Recharge batteries only in non-hazardous
locations.
AVERTISSEMENT:
Utiliser seulement l'ensemble de batterie RAE
Systems, la reference 500-0028, 500-0029 au 500-
0039. Cet instrument n’a pas été essayé dans une
atmosphère de gaz/air explosive ayant une
concentration d’oxygène plus élevée que 21%. La
substitution de composants puet compromettre la
sécurité intrinsique. Ne charger les batteries que
dans emplacements désignés non dangereuse.
STATIC HAZARD:
Clean only with a damp cloth.
DANGER RISQUE D'ORIGINE ELECTROSTATIQUE:
Nettoyer uniquement avec un chiffon humide.
vii
CAUTION:
For safety reasons this equipment must be operated
and serviced by qualified personnel only. Read and
understand instruction manual completely before
operating or servicing.
ATTENTION:
Pour des raisons de sécurité, cet équipment doit
être utilisé, entretenu et réparé uniquement par un
personnel qualifié. Étudier le manuel d’instructions
en entier avant d’utiliser, d’entretenir ou de réparer
l’équipement.
viii
CAUTION:
Before each day’s usage, sensitivity must be tested
on a known concentration of methane gas equivalent
to 20-50% of full scale concentration. Accuracy
must be within 0 to +20% of actual. Accuracy may
be corrected by calibration.
ATTENTION:
Avant chaque utilisation journalière verifier la
sensibilité avec une concentration connue de
methane equivalente a 20 - 50% de la pleine échelle.
La précision doit être comprise entre 0 - 20% de la
valeur vraie et peut être corrigée par une procédure
diétalonnage.
CAUTION:
Any rapid up-scale reading followed by a declining or
erratic reading may indicate a gas concentration
beyond upper scale limit which may be hazardous.
ATTENTION:
Toute lecture rapide et positive, suivie d’une baisse
subite au erratique de la valeur, peut indiquer une
concentration de gaz hors gamme de détection qui
peut être dangereux.
WARNING:
ix
The calibration of all newly purchased RAE Systems
instruments should be tested by exposing the
sensor(s) to known concentration calibration gas
before the instrument is used or put into service.
For maximum safety, the accuracy of the MultiRAE
PLUS should be checked by exposing the sensor(s)
to known concentration calibration gas before each
day’s use.
AVERTISSEMENT:
La calibration de toute instruments de RAE Systems
doivent être testé en exposant l’instrument a une
concentration de gaz connue par une procédure
diétalonnage avant de mettre en service l’instrument
pour la première fois.
Pour une securite maximale, la sensibilité du
MultiRAE PLUS doit être verifier en exposant
l’instrument a une concentration de gaz connue par
une procédure diétalonnage avant chaque utilisation
journalière.
GENERAL INFORMATION
1 - 1
1. GENERAL INFORMATION
MultiRAE PLUS is a programmable Multi-gas monitor
designed to provide continuous exposure monitoring of
toxic gases, oxygen and combustible gases for workers in
hazardous environments. It monitors three classes of
hazardous gases:
(1) Organic vapors in the ppm range with the supplied
Photo-Ionization Detector (PID) using a 9.8, 10.6 eV
or 11.7 eV gas discharge lamp,
(2) Combustible gases near their lower explosive limits
(LEL) with a catalytic bead sensor, and
(3) Inorganic compounds, including oxygen deficiency,
with the electrochemical sensors.
Other features include:
• Lightweight and Compact
- 16 oz (454 g), Walkman size.
• Dependable and Accurate
- 10 hours monitoring with micro controller.
• User Friendly
- menu driven, intuitive end-use operation.
• Programmable Alarm Thresholds
- audio buzzer & flashing display alarm.
MultiRAE PLUS (PGM-50) consists of: A Multi-gas
Monitor, a battery charger, rubber boot, alkaline battery
adapter, water and dust filters, plus calibration accessories.
GENERAL INFORMATION
1 - 2
1.1 General Specifications
Table 1.1
Multi -Gas Monitor Specification
Dimensions: 4.65”L x 3.0”W x 1.9”H
(11.8 cm x 7.6 cm x 4.8 cm)
Weight: 16 oz (454 g) with battery.
Detector: Up to five sensors (oxygen, combustible,
two toxic and VOC). Electrochemical
sensors for toxic gases and oxygen, photoionization detector for ppm level VOCs,
and catalytic sensor for LEL level
combustible gases.
Battery: Rechargeable, 4.8V/1100 mAh Li ion or
4.8V/1700 mAh Ni-Cd battery pack with
built-in charger (10 hours charge time ) or
a 4 AA alkaline battery adapter.
Operating Time: Up to 10 hours continuous operation.
Display: 2 line, 16 digit LCD with LED back light
automatically in dim light.
Key-pads: 1 operation key and 2 programming keys.
Direct Readout: Instantaneous values (up to 5), sensor
name, high and low values for all detectors,
TWA and STEL value s for toxic and VOCs,
battery voltage and elapsed time.
(Continued)
GENERAL INFORMATION
1 - 3
Multi -Gas Monitor Specification
(Continued)
Alarm Settings: Separate alarm limit settings for TWA,
STEL, Low and High alarm.
Range, Resolution and Response Time (t90 diffusion):
CO 0-500 ppm 1 ppm 20 sec
H2S 0-100 ppm 1 ppm 30 sec
SO
2
0-20 ppm 0.1 ppm 15 sec
NO 0-250 ppm 1 ppm 20 sec
NO
2
0-20 ppm 0.1 ppm 25 sec
Cl2 0-10 ppm 0.1 ppm 60 sec
O2 0-30 % 0.1 % 15 sec
VOC 0-200 ppm 0.1 ppm 10 sec
VOC 200-2000 ppm 1 ppm 10 sec
LEL 0-100 % 1 % 15 sec
HCN 0-100 ppm 1 ppm 60 sec
NH3 0-50 ppm 1 ppm 150 sec
PH3 0-5 ppm 0.1 ppm 60 sec
Alarm: 90 dB buzzer and flashing red LED to
indicate exceeded preset limits, low
battery, or sensor failure.
Calibration: Two point field calibration for fresh air
and standard reference gases.
Attachment: Rubber boot, wrist strap, belt clip.
Sampling Pump: Internal integrated with 300 cc/min flow
rate (high setting).
Protection: Password protected calibration settings,
alarm limits, and data.
GENERAL INFORMATION
1 - 4
Multi -Gas Monitor Specification
(continued)
Intrinsic Safety: UL & cUL Class 1, Division I, Group
A,B,C,D (US & Canada), EEx ia IIC T4
(Europe).
EM Immunity: No effect when exposed to 0.43 mW /cm2
RF interference (5 watt transmitter at 12
inches).
Data Storage: 20,000 readings (64 hours, 5 channels at 1
minute interval) in non-volatile memory.
Datalog Interval: Programmable 1- 3600 sec.
External Alarm: Optional plug in pen size vibration alarm or
earphone.
Communication: Upload data to PC and Download monitor
setup from PC through RS-232 link to
serial port on PC.
Temperature: -20o to 45oC (-4o to 113o F).
Humidity: 0 % to 95% relative humidity.
(non-condensing)
Configuration: 2, 3, 4 and 5 gas with / without pump
and with / without datalogging.
OPERATION OF MULTIRAE PLUS
2 - 1
2. OPERATION OF MULTIRAE PLUS
The MultiRAE PLUS Monitor gives real time measurements
and activates alarm signals whenever the exposure exceeds
preset limits on any of the five possible sensors. Prior to
factory shipment, the MultiRAE PLUS is pre-set with
default alarm limits and the sensors are pre-calibrated with
standard calibration gas. However, the user should calibrate
the instrument before the first use. After the monitor is
fully charged and calibrated, it is ready for immediate
operation.
OPERATION OF MULTIRAE PLUS
2 - 2
2.1 Physical Description
Figure 2-1 shows the main components of the MultiRAE
PLUS Multi-gas Monitor which include:
Figure 2-1 Major parts of the MultiRAE PLUS
Multi-gas Monitor
• 3 keys for the user to interact with the monitor: 1
operation key and 2 programming keys for normal
operation or programming of the monitor.
• LCD display with back light to show real time and
calculated measurements.
Gas Inlet and Filter
Buzzer &
Gas Outlet
Charge Contact
Serial Port for PC
Communication
Wrist Strap
Programming Keys
LCD Display
LED Alarm
OPERATION OF MULTIRAE PLUS
2 - 3
• Buzzer and red LED for alarm signal whenever the
exposures exceed preset limits and for error
conditions.
• Wrist strap.
• Charge contact for plugging directly to the charging
station.
• Gas entry port.
• Serial communication port for PC interface.
OPERATION OF MULTIRAE PLUS
2 - 4
2.2 Keys and Display
Figure 2-2 shows the LCD display and the keypad on the
front panel of the monitor. The functions of the 3 keys
during normal operation are summarized in Table 2.1 on the
next page:
Figure 2-2 Key-pad and Display of the MultiRAE PLUS
Multi-gas Monitor
Light
sensor
0.1
0.0
0.0
0.0
20.9
MODE
ON
Y/+
N/-
OXY
TOX2
VOC
LEL
TOX1
LED alarm/
charge status
[Mode]
key
[Y/+] Key
[N/-] Key
OPERATION OF MULTIRAE PLUS
2 - 5
Table 2.1
Key Function in Normal Operation
[MODE]: Turn on/off the power* and choose
different display mode.
[N/-]: Toggle on/off the back light. Answer as
“No.”
[Y/+]: Alarm test and alarm acknowledgment
(turn off latched alarm, turn on pump or
LEL sensor). Answer as “Yes.”
* Pressing and holding [MODE] key for 5 seconds turns off
the power to the monitor. Monitor will beep once per
second during power-down sequence. Press [MODE] key
momentarily to choose different display modes (see Section
2.4 for details).
OPERATION OF MULTIRAE PLUS
2 - 6
The Multi-gas Monitor includes a 2-line, 16-digit dot matrix
LCD display. The LCD shows the following eight types of
displays during normal operation if the [MODE] key is
pressed:
• Real time instantaneous gas concentration in ppm for
toxic and VOC gases, % by volume for oxygen and %
LEL for combustible gases.
• Sensor names.
• Peak and minimum gas concentration for toxic, VOC,
oxygen and combustible gases.
• 15 minute Short Term Exposure Level (STEL) values
of the toxic and VOC gases in ppm and 8 hours Time
Weighted Average (TWA).
• Battery voltage and shut off voltage in volts.
• Real time clock, run time and temperature.
• Datalogging mode or “Start / Stop Datalog?” menu to
enable/disable datalogging if manual datalogging
mode is selected.
• LEL or VOC gas names (if the LEL and VOC sensor
are installed).
• “Print Reading?” menu to print the reading to the
RAE Printer.
• “Communicate with PC?” menu to send or receive
data between PC and the MultiRAE PLUS monitor.
OPERATION OF MULTIRAE PLUS
2 - 7
2.3 Power On/Off
To turn on the MultiRAE PLUS Multi-gas Monitor, press
[MODE] key. The audio buzzer will beep once and the
display will show “ON!..” and then “MultiGas Monitor Ver
n.nn” to indicate the software version number. The custom
power-on-name which can be changed by the customer using
the ProRAE Suite Software. The model number, serial
number, current date and time, temperature of the monitor
are displayed next. The monitor will then go through each
sensor socket to check if a valid sensor is installed. If a new
sensor is installed, a message to remind the user to calibrate
the sensor will be displayed followed by a message that the
alarm limits have been reset to default values for the new
sensor. If a sensor reaches its expected end of life, a
“Warranty Expired” message will be displayed.
Next, the monitor displays the preset alarm limits for each
sensor, battery voltage, shut off voltage, user mode, alarm
mode, datalog mode, available data storage memory (in
hours), datalog mode and datalog interval (in seconds) and
then after 10 seconds, the display shows the instantaneous
reading of the gas concentration in ppm and is ready to
monitor gases.
To turn off the MultiRAE PLUS Multi-gas Monitor, pr ess
and hold the [MODE] key for 5 seconds. Monitor will beep
once per second during power-down sequence with a count
down timer showing the number of remaining seconds. The
message “Off!..” flashes on the LCD display and the display
will go blank, indicating that the monitor is turned off.
OPERATION OF MULTIRAE PLUS
2 - 8
Turning off the Multi-gas monitor with the AC charger in
place will result in a display of “Charging..” or “Battery
Charged” and indication of battery voltage. This indicates
that the monitor is off, but the smart charger circuit is now
active.
To turn the unit on from the charge or discharge mode, press
the [MODE] key.
Data protection during power off
When the monitor is turned off, all the current real time data
including TWA, STEL, Peak and elapsed time are erased.
However, the datalog data is preserved in non-volatile
memory. Even if the battery is disconnected, the datalog
data will not be lost. During the power off period, the real
time clock will continue to operate until the battery is
completely drained (usually in 5-7 days without any
charging). If the battery is completely drained or is
disconnected from the monitor for more than 30 minutes,
the real time clock will be lost. In this case, users need to
enter the real time clock information again, as described in
Section 4.
OPERATION OF MULTIRAE PLUS
2 - 9
Datalog versus Non Datalog monitor
There are two versions of the PGM-50 Multi-gas Monitors:
Datalog monitors and Non-Datalog monitors. During power
on sequence, a letter “D” following the version number
indicates that the monitor is configured as a Datalog
monitor. Without the letter “D”, it is a Non-Datalog
monitor.
Users can upgrade a Non-Datalog monitor to a Datalog
monitor. Call the factory for information on how to order
the upgrade kit and follow the instructions described in
Section 5.7 to enable or disable the datalog feature for the
monitor.
OPERATION OF MULTIRAE PLUS
2 - 10
2.4 Operation
The MultiRAE PLUS Multi-gas Monitor offers three
different user modes of operation:
Text mode,
Display mode, and
Programming mode (default mode setting).
The text mode is the simplest mode of operation. The
monitor will display the sensor name after the monitor is
turned on. The user can press the [MODE] key to see the
instantaneous gas concentration reading, battery voltage or
enter the PC communication menu. The user can get into
the calibration mode from text mode to do calibrations, but
cannot change most of the parameters.
In the display mode, the MultiRAE PLUS Multi-gas
Monitor is able to display all the information in the text
mode. In addition, the following information is also
available by pressing the [MODE] key: peak, minimum,
STEL, TWA, run time in hours and minutes, temperature in
degree C, datalog mode (or enable / disable datalogging
operation in manual datalog mode), LEL/VOC gas names,
printing and communication with a PC options. The user
cannot get into the calibration mode from display mode , so
the user cannot do calibration and cannot change any of the
parameters.
In the programming mode , which is the default setting, the
user can perform all of the functions of the display mode. In
addition, the user can get into calibration mode, perform
OPERATION OF MULTIRAE PLUS
2 - 11
calibrations and change any of the parameter in the
calibration mode.
The following is the detail explanation of the displays when
the [MODE] key is pressed
1) The instantaneous reading is the actual gas
concentration in parts per million (ppm) for toxic or
VOC gases, % of volume for oxygen and % of LEL for
combustible gases. The reading is updated once per
second and is shown in the LCD display.
TOX1 VOC TOX2
0 0.0 0
0 20.9
LEL OXY
2) The sensor names are displayed as:
LEL: for combustible gas sensor
VOC: for PID sensor
OXY: for oxygen sensor
CO, H2S, etc.: for up to 2 toxic sensors
TOX1 VOC TOX2
CO VOC H2S
LEL OXY
LEL OXY
OPERATION OF MULTIRAE PLUS
2 - 12
3) The Peak reading is the highest reading of each gas
concentration since the monitor was turned on. The
reading is updated at one-second intervals and is
shown in the LCD display with “Peak” message.
TOX1 VOC TOX2
5 2.0 3
10 Peak 20.9
LEL OXY
4) The Minimum reading is the lowest reading of each gas
concentration since the monitor was turned on. The
reading is updated at one-second interval s and is shown
in the LCD display with “Min” message.
TOX1 VOC TOX2
0 0.0 0
0 Min 19.9
LEL OXY
5) The STEL reading is the last 15 minute average reading
of the gas concentration. The reading is updated once
per minute and is shown in the LCD display with “STEL”
message. For the first 15 minutes, “****” will be
displayed. This reading applies to VOC and toxic gases
only.
TOX1 VOC TOX2
0 0.0 0
STEL
LEL OXY
OPERATION OF MULTIRAE PLUS
2 - 13
6) The TWA reading is the accumulated reading of the gas
concentration divided by 8 hours since the monitor was
turned on. The reading is updated once a minute and is
shown in the LCD display with “TWA” message. This
reading applies to VOC and toxic gases only.
TOX1 VOC TOX2
0 0.0 0
TWA
LEL OXY
7) The battery voltage reading is the current battery
voltage in volts. The reading is updated once per second
and is shown in the LCD display. The shut down voltage
is also shown. Note: A fully charged battery pack
should show 4.8 volts or higher. When the battery
voltage falls below 4.4 volts, a flashing “Bat” will appear
as a warning message. This means there is 20-30
minutes run time left before the monitor will be turned
off automatically, when the battery voltage falls below
4.2 volts.
TOX1 VOC TOX2
Battery = 4.8 V
Shut down at 4.2 V
LEL OXY
OPERATION OF MULTIRAE PLUS
2 - 14
8) The run time reading is the accumulated “On” time in
hours and minutes since the monitor was turned on. The
reading is updated at one minute intervals and is shown
in the LCD display together with the current date, time
and temperature.
TOX1 VOC TOX2
8/3/96 8:30
On = 3:50 20°C
LEL OXY
9) The datalog menu shows the cur rent datalog mode. If
manual datalog mode is selected, the menu will prompt
the user to turn on or off datalogging. Pressing the [Y/+]
key while “Start Datalog?” message is displayed turns on
the datalogging. Likewise, pressing the [Y/+] key while
“Stop Datalog?” message is displayed turns off the
datalogging.
10) The monitor will display the selected LEL and VOC gas
name if the combustible sensor and PID sensor are
installed. When an LEL or VOC gas is selected, the
“calculated” gas concentration based on the built-in
correction factor for that specific gas will be displayed.
11) Print Reading? asks for printing out of the gas
concentration reading. If a serial printer is connected
and ready, pressing the [Y/+] key will print out the
reading.
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