RAE Systems - MultiRAE Plus manual (Rev. B1, November 2003)

MultiRAE Plus
PGM-50/4, PGM-50/4P, PGM-50/5P
Multiple-Gas Monitor
USER MANUAL
008-4022-000, Revision B1, November 2003
Equipment List
NUMBER
P ART
P ART NUMBER
Monitor Only
(not shown)*
Shipping case
008-3040-000
2
Monitor with wrist strap
as specified
2
Sensors
as specified
2
Rubber boot with belt clip
008-3042-000
2
Rechargeable Li-Ion battery
500-0037-100
3
Alkaline battery adapter
500-0029-000
4
120-230 V AC/DC wall adapter
5
Calibration adapter
008-3016-000
5
External filters
008-3022-003
5
Inlet probe
008-3012-001
5
Charcoal filters
008-3006-005
6
Training CD
008-4013-000
7
User manual
008-4022-000
as specified
Monitor with Accessories Kit
1
Hard transport case
002-3009-000
8
Remote sampling probe with coiled
Teflon tubing
008-3015-200
9
Tool kit
081-0005-000
Optional Calibration Kit
008-3001-000
10
Calibration gas
as specified
11
Regulators with tubing (male)
007-3021-000
11
Regulators with tubing (female)
002-3011-000
Datalogging Upgrade Option
008-001-000
6
ProRAE Suite software package, for
Microsoft® Windows™ 95, 98, 2000,
NT, ME & XP
000-5001-000
12
Computer interface cable
008-3003-000
*Different shipping cases are used for monitor-only and single calibration gas kits.
This is a complete kit, which includes the accessories and calibration kits
with a MultiRAE Plus monitor that is datalog-enabled.
6
11 9
5
10
8
11
3 2 12 4
7
10
i
Read Before Operating
This manual must be carefully read by all individuals who
have or will have the responsibility of 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 modules for service. Never operate this
monitor while the cover is removed. Remove monitor cover
and sensor modules only in an area known to be nonhazardous.
!
Special Note
When the MultiRAE Plus monitor is taken out of the transport
case and is turned on for the first time, there may be some
residual vapors trapped inside the monitor and the initial
toxic gas sensors may indicate a few ppm. After running the
monitor for several minutes in clean air, the residual vapors
should clear and readings should return to near zero.
!
Attention! For European Applications
A.
0575
II 2G
DEMKO 03 ATEX 0308256X, EEx ia d IIC T3/T4
B. Recharge batteries in non-hazardous locations.
C. Do not connect external cable to serial interface jack in
hazardous locations.
D. Use RAE Systems Adapter P/N 500-0072 for connection
to communication port and charging jack only in a non
hazardous area.
Protected by U.S. Patents 5,393,979 , 5,561,344 ,
5,773,833 , 6,225,633 , 6,313,638 , 6,333,632 , 6,320,388
ii
!
Warnings
!
For safety reasons this equipment must be operated and
serviced by qualified personnel only. Read and understand
the instruction manual completely before operating or
servicing.
!
Battery Pack
Use only RAE Systems battery packs, part number 5000029 or 500-0037. 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
atmospheres.
!
Computer Interface
Do not transfer data by means of the computer interface cable
in hazardous atmospheres.
!
Static Hazard
Clean only with a damp cloth.
!
Calibration
The calibration of any newly purchased RAE Systems
Instrument should be tested by exposing it to known
concentration calibration gases before the instrument is put
into service for the first time. For safety, check the accuracy of
the monitor by exposing the sensors to known concentration
calibration gas(es) before each day’s use.
!
Readings
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.
iii
!
Avertissements
!
Pour des raisons de sécurité, cet équipement 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.
!
Ensemble de Batterie
Utiliser seulement l’ensemble de batterie RAE Systems avec
numéro de série 500-0029 ou 500-0037. 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 peut compromettre la sécurité
intrinsèque. Ne charger les batteries que dans l’emplacement
désigné non dangereux.
!
Câble de Computer
Connecter pas le câble externe que dans environnements
non dangereux.
!
Danger Risque D’origine Electrostatique
Nettoyer uniquement avec un chiffon humide.
!
La Calibration
La calibration de toute instruments de RAE Systems doit être
testé en exposant l’instrument à une concentration de gaz
connue par une procédure die talonnage avant de mettre en
service l’instrument pour la première fois. Pour une sécurité
maximale, la sensibilité du MultiRAE Plus doit être vérifié en
exposant l’instrument à une concentration de gaz connue
par une procédure die talonnage avant chaque utilisation
journalière.
!
Les Lectures
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 dangereuse.
iv
Table of Contents
•
General Information
1
•
1
Operating the MultiRAE Plus
•
Dataloging-Enabled Monitors
• 1
Physical Description
Display
•
1
Turning the Monitor On and Off •
•
User Modes
2
2
2
•
Calibrating the Monitor
•
Getting Started
5
5
•
Span Gas Calibration
6
• 6
Fresh Air Calibration
•
Zero Organic Filters for Zeroing PID
•
7
Calibrating the PID Sensor •
7
Multiple Sensor Calibration
•
Single Sensor Calibration
8
•
MultiRAE Plus Usage Overview
•
Alarm Signals
•
• 12
12
•
Sampling Pump
Datalogging
9
10
Preset Alarm Limits and Calibration
Back Light
6
•
12
13
•
Datalog Options
13
•
Charging the Battery Pack
Accessories
External Filters
•
14
15
•
15
Remote Sampling Probe
• 15
Optional Dilution Fitting
•
Calibration Adapter
15
• 16
Using the Intrinsically Safe Barrier Box
•
18
v
• 19
Programming Mode
•
Programming Menus
•
Security Levels
20
21
•
Calibrate Monitor
22
Change Alarm Limits •
22
•
Change Datalog Setting
23
• 24
Change Monitor Setup
•
Change Sensor Configuration
Correction Factors
•
26
Diagnostic Mode
•
27
25
•
Sensor Name and Raw Sensor Readings
•
RF Test (Radio Frequency)
27
•
Adjust Lamp Failure Threshold
•
Battery Type and Bias
27
28
Show x1 and x10 Range of PID Sensor •
Display Contrast
LEL Power •
•
28
29
29
•
Back Light Threshold
29
Serial Number and Pump
•
Battery Duration Time •
29
•
29
• 29
Communicate with PC
Maintenance
•
• 29
Sensor Expiration Date
•
28
28
Clock, Time, Battery, and Temperature
Pump Stall
27
30
Li-Ion Battery Pack
• 31
Replacing the Battery Pack
•
31
•
Emergency Alkaline Battery Adapter
Sensor Replacement
•
32
33
CO Sensor Charcoal Filters
•
34
Special Bias Voltage for Toxic Gas Sensors •
PID Sensor Cleaning/Replacement
Taking Care of the Lamp
•
Sampling Pump Replacement
•
36
36
•
37
Troubleshooting • 38
Specifications • 40
Range, Resolution & Response Time •
Service and Repair Record
vi
•
42
41
35
General Information
The MultiRAE Plus is a programmable multiple-gas monitor designed to
provide continuous exposure monitoring of toxic organic and inorganic
gases, oxygen and combustible gases for workers in hazardous
environments.
The MultiRAE Plus is an extremely flexible one-to-five sensor instrument
for use in confined space, emergency response, industrial hygiene,
and many other monitoring applications. The MultiRAE Plus is the
only instrument available on the market today that can offer protection
using both standard gas detection sensors for the detection of oxygen,
combutible gas, and specific toxic gases, as well as an integrated PhotoIonization Detector (PID) for the ultimate broad-range toxic gas detection.
The MultiRAE Plus is easily reconfigured and upgraded to meet your
changing needs. Its versatility replaces a wide range of monitors, saving
training, and maintenance costs. The MultiRAE Plus transitions quickly
and easily from a sophisticated technician instrument to a simple text
or display only monitor. The same monitor can be used as a personal
monitor, a hand-held sniffer, or as a continuous operational area monitor.
Dataloging-Enabled Monitors
Datalog monitors are capable of storing datalog data in the instrument’s
non-volatile memory. When the version number appears during the
power-on sequence, the “D” indicates a Datalog monitor. Call the
factory to learn how to upgrade the instrument to a Datalog monitor.
Physical Description
1. Display
2. Operation/programmi
3. Visual alarm/charge s
4. Light sensor
5. Power jack
6. RS-232 port
7. Wrist strap holder
8. Buzzer and gas outlet
9. Gas inlet
10. External filter
General Information 1
Operating the MultiRAE Plus
! The external filter must always be used with the monitor.
Turning the Monitor On and Off
To turn on, press M . The monitor will beep once and go through a
90-second warm-up sequence as follows:
M O DE
On! – English, PGM-50
Multi-Gas Monitor, Software Version
RAE Systems, Inc. (customizable using ProRAE Suite software)
Monitor Type, Serial Number
Date, Time, Temperature
Checking Sensor ID’s (As the MultiRAE Plus checks each sensor, it displays
the date it was last calibrated and its warranty expiration date. If a new sensor
is installed, it will ask for it to be calibrated.)
Alarm Limits (for High, Low, STEL, TWA)
Instrument Calibration (The last calibration date must be within the last 30
days for safe operation.)
Battery Shut Off Voltage
User Mode
Alarm Mode
Datalog Memory
Datalog Time Left
Datalog Mode
Datalog Period
To turn off after the warm-up is complete, press and hold M for 5
seconds. The monitor beeps each second during the count-down
sequence. Release when “Off! .........” flashes on the LCD. Plug the
110 VAC/12 VDC transformer into the monitor when not in use; the
“Charging…..” message appears on the screen.
M O DE
User Modes
The MultiRAE Plus has three user modes: Text, Display, and
Advanced. Each mode provides a different level of access to the
monitor’s features. Text mode is the simplest mode, Advanced mode is
the most complex.
2 Operating the MultiRAE Plus
The table shows the features in the order in which they appear.
Regardless of which user mode the monitor is in, press M to advance
to the next available feature.
M O DE
Features
Sensor Names & Instantaneous
Readings - instantaneous readings
are the actual gas concentrations
for the following sensors:
TOX1 (toxic gas) – parts-per-million (ppm)
TOX2 (toxic gas) – ppm
VOC (volatile organic compound) – ppm
LEL (lower explosive limit) – percentage
OXY (oxygen) - percentage
Text
Mode
Display
Mode
Advanced
Mode
yes
yes
yes
(with
“OK”
on
LCD)
PEAK - the highest reading for
each gas concentration since the
monitor was turned on; updated
every second.
no
yes
yes
MIN - the lowest reading for
each gas concentration since the
monitor was turned on; updated
every second.
no
yes
yes
STEL - the Short Term Exposure
Limit for VOC and toxic gases
only; the average reading of the
gas concentration for the last 15
minutes, which is updated every
minute. NOTE: “****” will appear
for the first fifteen minutes.
no
yes
yes
TWA - the Time Weighted Average
for VOC and toxic gases only; the
accumulated reading of the gas
concentration, divided by 8 hours,
since the monitor was turned on.
Updated every minute.
no
yes
yes
Operating the MultiRAE Plus 3
Battery Voltage - the current
battery voltage, measured in volts.
Shut off - A fully charged battery
will be 4.8 V or greater. When
the battery voltage falls below
4.4 V, the “Bat” warning message
appears and only 20-30 minutes
of run time remain before the
instrument will automatically shut
down (at 4.2 V).
yes
yes
yes
Date & Time, Run-Time and
Temp - the runtime is how long the
instrument has been on in hours
and minutes.
no
no
yes
Start/Stop Datalog - turns manual
datalogging on/off.
no
no
yes
LEL Gas - monitor measures LEL
in units of specified target gas.
NOTE: Correction factor may only
be changed in Program Mode.
no
no
yes
VOC Gas - monitor measures VOC
in units of specified target gas.
NOTE: Correction factor may only
be changed in Program Mode.
no
no
yes
Print Reading - capable of printing
out the gas concentration readings
if a serial printer is connected to
the instrument. NOTE: This feature
can be turn on using ProRAE
Suite.
no
yes
yes
PC Communication - capable of
uploading data from the monitor
to a computer or downloading
configuration information from
a computer to the monitor via a
serial port.
yes
yes
yes
4 Operating the MultiRAE Plus
Calibrating the Monitor
! While all instruments are calibrated prior to leaving the factory,
temperature extremes and/or shocks during shipment can cause
sensor drift. Therefore, the accuracy of any newly purchased RAE
Systems monitor should be tested by exposing the sensor(s) to known
concentration calibration gas before the monitor is used or put into
service. For maximum safety, the accuracy of the monitor should be
checked by exposing the sensor(s) to known concentration calibration
gas before each day’s use.
When should you calibrate the monitor?
The monitor should be calibrated no less than every 30 days, or if it does
not pass a fresh air reading, or if it does not pass a field verification.
Calibration
The sensors are calibrated in a two-step process using fresh air and
span gas (a span gas contains a known concentration of a given gas).
Some sensors may show sensitivity to other gases - this is called
“cross sensitivity”. Therefore, it is important to choose the gas mixture
carefully. We recommend the standard RAE Systems MultiRAE Plus
4-gas calibration mix (50% LEL methane, 20.9% oxygen, 25 ppm H2S,
50 ppm CO in a single gas cylinder) to calibrate the LEL, H2S and CO
sensors, and isobutylene (100 ppm) for the PID. You will also need
a calibration adapter in order to connect the monitor (with external
filter!) to the outlet of the gas cylinder. For the calibration of other toxic
sensors, you will need the specific gas for that sensor.
Getting Started
To calibrate the monitor, the instrument must
be in Program Mode. To enter Program Mode,
press and hold M and [N/-]
N/- for 5 seconds.
M O DE
If the monitor is in Text or Display Mode, you
will be prompted for a password. Use [Y/+]
Y/+ to
change the number. Use M to move on to
the next digit. The default password is “0000”.
Press and hold M to submit the password.
M O DE
TOX1
VOC
TOX2
Enter Password =
0000
LEL
OXY
M O DE
Operating the MultiRAE Plus 5
Fresh Air Calibration
The first step of calibration is a Fresh Air
Calibration:
TOX1
VOC
TOX2
Calibrate Monitor?
Calibrate Monitor?
Press [Y/+]
Y/+ .
LEL
OXY
Fresh Air Calibration?
TOX1
VOC
TOX2
Fresh Air Calibration?
LEL
OXY
Y/+ .
Press [Y/+]
The monitor will cycle through each sensor.
When the process is complete, the display will
read, “Zero Cal Complete!”.
Zero Organic Filters for Zeroing PID
Use an optional external zero organic filter (P/
N 008-3024-000, 3-pack) when the ambient air
may be contaminated with hydrocarbons.
Attach the filter to the MultiRAE Plus during
fresh air calibration. The filter can be used
up to 20 times before disposing. This filter
removes most heavier organic and inorganic
compounds, but may not completely remove
lighter compounds such as methane, propane,
and CO.
Span Gas Calibration
To complete step two of calibration, a Span Gas Calibration must be
performed for each sensor.
The instructions below are for a standard confined space entry
instrument utilizing CO, H2S, LEL, Oxygen sensors.
For this calibration you will need the standard RAE Systems MultiRAE
Plus 4-gas calibration mix (50% LEL methane, 20.9% oxygen, 25 ppm
H2S, 50 ppm CO in a single gas cylinder). For the calibration of other
toxic sensors, or to calibrate a single sensor, please go to the Program
Mode section of this manual.
6 Operating the MultiRAE Plus
Multiple Sensor Calibration
Press [Y/+]
Y/+ .
TOX1
The monitor will assume you want to calibrate the
CO, H2S, LEL and Oxygen sensors.
LEL
TOX2
OXY
Press [Y/+]
Y/+ .
TOX1
Apply the RAE Systems 4-gas span gas
mixture and start the gas flow.
LEL
The 60-second countdown timer appears.
TOX1
“Span Cal Done! Turn Off Gas” message
appears. The readings should be very close
to the span gas values shown on the gas
cylinder.
VOC
Multiple Sensor
Calibration?
CO
LEL
VOC
---
TOX2
H2S
OXY
OXY
VOC
TOX2
Span Cal done!
Turn off Gas!
LEL
OXY
Turn off the gas flow and disconnect the calibration adapter from the
monitor. If calibration fails, an error message appears instead. Refer to
Troubleshooting: “Calibration Error Message” on page 38.
NOTE: If calibration is accidentally started and gas has run out or has
been disconnected, press M repeatedly. Calibration will stop and revert
back to the previous calibration values.
M O DE
Calibrating the PID Sensor
The single sensor method used to calibrate the PID can also be used to
calibrate single toxic sensors. For the PID, use isobutylene (100ppm)
span gas. For other toxic sensors, use the appropriate gas, e.g.,
ammonia sensor - use ammonia gas, etc.
Operating the MultiRAE Plus 7
Single Sensor Calibration
TOX1
VOC
TOX2
Single Sensor
Calibration?
LEL
OXY
TOX1
CO
LEL
VOC
█OC
pick
LEL
TOX2
H2 S
OXY
Press [Y/+]
Y/+ .
When the installed sensors appear on the
display use M to move from sensor to sensor.
M O DE
Press [Y/+]
Y/+ to select the highlighted sensor and
start calibration.
Apply span gas mixture and start gas flow.
OXY
The 60-second countdown timer appears.
NOTE: Some sensors (Cl2, PH3, NH3 , HCN) require a special “presoak”
period prior to starting calibration. Turn the gas on to the MultiRAE
Plus for this time period. Refer to Range, Resolution and Response
Time chart on page 41 BEFORE starting the calibration procedure.
When calibration has started and if the MultiRAE Plus displays “No gas
flow...” apply gas or hit any key to start. Press [Y/+]
Y/+ to start calibration.
TOX1
VOC
TOX2
Span Cal done!
Turn off Gas!
OXY
LEL
Calibration is complete when the sensor name
and its span value appear, confirmed by a
“Span Cal Done! Turn Off Gas” message. If no
gas has reached a sensor after sixty seconds,
calibration will abort. The readings should be
relatively close to the span gas values.
Turn off the gas flow and disconnect the
calibration adapter from the monitor. If
calibration fails, an error message appears
instead. Refer to Troubleshooting: “Calibration
Error Message” on page 38.
Calibration Time Stamp
A time stamp is created and stored each time a sensor calibration is
performed, which is included in the datalog report.
Press M twice to exit calibration mode and return to the main display.
M O DE
NOTE: Residual gas may linger on the sensors for up to 60 seconds.
If the sensors do not return to zero, repeat fresh air calibration.
8 Operating the MultiRAE Plus
MultiRAE Plus Usage Overview
Storage
Always keep the MultiRAE Plus on charge in a dry indoor area when
not in use.
! If the MultiRAE Plus is to be stored more than 2 weeks off the charger,
it is recommended to remove the Li-ion battery. Upon reinstalling the
battery, it will need a complete charge and some sensors (like NO
and NH3) may require time to warm up, anywhere from 20 minutes to
24 hours. Refer to Technical Note-114 Sensor Specifications and Cross
Sensitivities. The clock will also need to be reset.
Confined Space Pre-Entry Test
Test the atmosphere in the confined space by sampling air at 3 levels
(Top, Middle and Bottom) in the Confined Space. Give the instrument
time to sample the gas at each level - the correct sampling time is 60
seconds plus 1 second per every foot of hose.
Alarms
If there are any gas ALARMS at any level in the confined space it is
not safe. DO NOT ENTER!
Identify the alarm condition and then start your preventive actions
according to your company’s Confined Space Entry procedures.
No Alarms
If there are no alarms, the Confined Space may be safe for entry.
Disconnect the hose before carrying the MultiRAE Plus into the
Confined Space. If monitoring is to be done by a Confined Space
attendant, they should continue to monitor while you enter the area.
If the unit alarms and “BAT” is displayed, the battery needs to be
charged. There is 15 minutes or less of run time remaining. Leave the
Confined Space immediately! See the Applications and Technical
Notes Guide for more information regarding Confined Space Entry
and other applications.
After Usage
Turn the MultiRAE Plus off by pressing and holding M . The buzzer will
beep and count down 5-4-3-2-1 and read “OFF”. Return the MultiRAE
Plus to the dry, indoor storage area and connect the charger to the
MultiRAE Plus.
M O DE
Operating the MultiRAE Plus 9
Alarm Signals
When an alarm condition occurs, the monitor will provide audible and
visual alarms to alert users of unsafe conditions. Refer to the Alarm
Signals table on page 11 for a complete list of alarm conditions.
! The alarm signals are disabled while in the following modes:
Communicate with PC, Print Reading, Calibrate Monitor. To reduce the
risk of exposure to hazardous atmospheres, use these modes only in an
area known to be non-hazardous.
The alarm system can be set up in one of two ways:
Auto Reset Alarm (default): The alarm signals automatically reset
when the alarm condition is no longer present. NOTE: Not all alarm
conditions have this option.
Latched Alarm: The alarm signal remains on even when the alarm
condition is no longer present; press [Y/+]
Y/+ to acknowledge and reset
alarm signals.
Testing Alarm Signals
Press [Y/+]
Y/+ . If functional, the buzzer will beep once and the backlight
will flash once.
10 Operating the MultiRAE Plus
Alarm Signal
flash/sec vibration* Screen Message
Alarm Condition
beep/sec
Gas concentration
exceeds High Alarm
Gas concentration
exceeds Low Alarm
Gas concentration
exceeds STEL
3
3
yes
2
2
yes
1
1
yes
Gas concentration
exceeds TWA
Gas concentration
exceeds sensor range
Unit short circuits or
Reading over max range
1
1
yes
3
3
yes
3
3
yes
1
1
yes
3
3
yes
sensor name
“NEG”
“PUMP”
3
3
yes
“LAMP”
3
3
yes
sensor name
“OFF”
1/min
1
1/min
1
no
yes
“Bat”
“Mem”
1
1
yes
“EEm”
Excessive sensor
negative drift
Blocked inlet or
Pump failure
PID lamp fails to light
Excessive LEL gas or
LEL sensor is OFF
Low battery
Datalog memory full
Datalog memory write error
*The external vibration alarm is an optional feature.
sensor name
“HIGH”
sensor name
“LOW”
sensor name
“STEL”
sensor name
“TWA”
sensor name
“OVR”
sensor name
“MAX”
Reset Alarm
move away from gas
move away from gas
move away from gas & wait 15
minutes
move away from gas & turn unit
OFF/ON
move away from gas
indicates possible sensor
failure. calibrate sensor to verify
performance
perform zero calibration
unblock inlet; press Y/+
to restart pump
turn off/on or wait;
lamp may turn on by itself
move away from gas & turn LEL
sensor ON (press Y/ + )
charge battery
clear datalog memory or turn on
“wrap-around
turn unit OFF/ON
Preset Alarm Limits and Calibration
The monitor is factory calibrated with standard calibration gas and is
programmed with default alarm limits as listed:
Gas
Cal Gas/Balance
Unit
TWA
STEL
Low
High
CO
50/Air
ppm
35
100
35
200
H2S
25/N2
ppm
10
15
10
20
SO2
5/N2
ppm
2
5
2
10
NO
25/N2
ppm
25
25
25
50
NO2
5/Air
ppm
1
1
1
10
Cl2
10/N2
ppm
0.5
1
0.5
5
O2
20.9/N2
%Vol
-
-
19.5
23.5
CH4
50/Air
%LEL
-
-
10
20
HCN
10/N2
ppm
5
5
5
50
NH3
50/N2
ppm
25
35
25
50
PH3
5/N2
ppm
0.3
1
1
2
VOC*
100/Air
ppm
10.0
25.0
50.0
100
*Note: 100 ppm isobutylene gas is used for VOC gas calibration
Back Light
The backlight assists reading the LCD in poor lighting conditions and
automatically turns on anytime the MultiRAE Plus is in alarm.
N/- , and it will automatically turn off after
To manually turn on, press [N/-]
60 seconds. The backlight can also be set to automatically turn on in low
lighting conditions, and likewise turn off in adequate lighting conditions.
NOTE: The backlight can shorten the operating time by 20-30%.
Sampling Pump
The integrated sampling pump automatically turns on when the monitor
is turned on and remains on during normal operation. The pump speed
is adjustable between the default low setting (~200 cc/min) and the
high setting (~300 cc/min). Use the low setting to save battery and filter
life. Use the high setting for reactive gases and remote sampling in
applications like Wingtank entry and HazMat.
12 Operating the MultiRAE Plus
The monitor can detect any obstructions in the external filter that causes
a pump stall. The alarm will activate and a “Pump” error message will
Y/+ to start the pump
appear. To acknowledge the pump stall, press [Y/+]
again.
Refer to Pump Stall on page 29 for details on how to adjust the pump
stall threshold for either the high or low settings.
Datalogging
A small “L” at the center of the screen means the monitor is datalogging.
Datalogging-enabled monitors can calculate and store hours of gas
readings based on the time-interval and type of gas measurement
specified. The time-interval can be set to between 1 and 3600 seconds
in 1-second increments. The average and peak gas concentrations are
the two types of gas measurements that can be stored for each sensor.
NOTE: STEL and TWA values will only be logged if average is selected.
All data is stored in non-volatile memory that can be downloaded to a
computer. Users may select one of two types of memory storage: wraparound or stop. Refer to Select Memory Full Type on page 23.
NOTE: Datalogging pauses upon entering Program Mode or
PC Communication Standby Mode. Upon exiting Program Mode
datalogging will resume. Upon exiting PC Communication Standby
Mode, datalogging will resume only if datalogging mode was set to
“Automatic”.
Maximum Datalog Time for 5 Sensors
Log Interval
1 sec
60 sec
300 sec (5 min)
Tmax
80 minutes
80 hours
400 hours
Datalog Options
Automatic: Datalogging automatically starts/stops when the monitor is
turned on/off.
Manual: If the MultiRAE Plus is in Advanced mode, press [Y/+]
Y/+ at the
“Start Datalog” screen. Set a timer to specify the maximum datalogging
time using ProRAE Suite software.
Periodic: Set a daily start/stop time to datalog using ProRAE Suite.
Scheduled: Set a monthly start/stop time to datalog using ProRAE
Suite.
Operating the MultiRAE Plus 13
Charging the Battery Pack
To charge the battery pack plug the transformer supplied with the
monitor into the power jack on the monitor.
When a Li-Ion battery pack is installed, charging automatically begins.
The LED appears red during charging, and once the battery is fully
charged, the LED turns green. The display also indicates the charge
status. A completely drained battery pack charges to full capacity in
less than 10 hours. When the “Bat” message appears on the LCD, the
battery pack needs to be recharged.
NOTE: A fully charged battery pack will switch to trickle charge to
maintain battery life. Repeatedly turning the power to the transformer
on and off will reset the charge and possibly burn out the battery.
To change the battery pack or to use the alkaline battery adapter, refer
to Replacing the Battery Pack or Emergency Alkaline Battery Adapter
on page 32.
! If the MultiRAE Plus is to be stored more than 2 weeks off the charger, it
is recommended to remove the Li-ion battery.
14 Operating the MultiRAE Plus
Accessories
External Filters
The external filter is a PTFE (Teflon®) membrane with a 0.2 micron pore
that reduces the amount of liquid and dust that can contaminate the
sensor. Using the external filter prolongs sensor and pump life.
Change the external filter whenever it becomes discolored, clogged
with particles, or draws in liquid.
NOTE: Do not use the external filter when calibrating reactive gases.
Instead, use the High Pump Speed setting and a short Teflon® tube.
Although this shortens battery life, it provides a faster response.
Remote Sampling Probe
When searching in hard-to-reach areas, use
the standard remote sampling probe (P/N
008-3015-200) with a telescoping handle
and 6 feet of Teflon tubing. For longer
distances, attach a length of Teflon tubing.
The monitor is capable of drawing samples
from over 100 feet.
Optional Dilution Fitting
When gas samples have less than 10% oxygen, the dilution fitting (P/N
008-3025/3026) will increase the oxygen concentration. The dilution
fitting can also measure combustible, VOC or toxic gases when the
concentration exceeds the upper limit of the sensor range. In Program
Mode, set the dilution ratio to obtain the correct gas reading when the
dilution fitting is used. The dilution fitting attaches directly to the meter
and the sample tubing attaches to the dilution fitting. Refer to Technical
Note-167 Proper Use of Dilution Fittings on Pumped Monitors for more
information.
! The monitor and the dilution air inlet must be located in a clean
atmosphere outside the confined space. Use either a remote sampling
probe or Tygon tube test gas samples.
Accessories 15
Calibration Adapter
The calibration adapter is a 6-inch Tygon tube with a male Luer
connector on the end. During calibration, connect one end of the tube
to the external filter (on the monitor) and the other end to the calibration
gas.
Alternatively, the calibration gas can be sampled from:
an optional Tedlar gas bag (P/N 500-0003-000) filled with calibration
gas,
16 Accessories
an optional open cup (P/N 007-3002-000) with calibration gas flow
exceeding the pump demand,
or an optional demand flow regulator (P/N 002-3051-000, female or
P/N 008-3052-000, male) directly from the gas cylinder.
Accessories 17
Using the Intrinsically Safe Barrier Box
! This does NOT ship with UL/cUL-approved monitors. The barrier box is
only for ATEX European approved MultiRAE monitors.
To conform to ATEX European safety standard, the barrier box must be
used when utilizing an RS-232 cable and/or transformer.
1. RS-232 cable (detachable)*
2. Computer interface cable
3. Transformer (detachable)**
4. Intrinsically safe barrier
5. Power cable
6. MultiRAE Plus monitor
2
3**
4
5
6
Communicating with a Computer
* This connection is not necessary during normal charging.
Connect the RS-232 cable from the barrier box to the monitor.
Connect the computer interface cable to the barrier box.
Plug the computer interface cable into a computer.
Charging the Monitor
** Connection is optional during computer communication.
Connect the power cable from the barrier box to the monitor.
Connect the transformer to the barrier box.
Plug the transformer into an appropriate outlet.
18 Accessories
Programming Mode
In addition to calibration, authorized users may change the monitor
settings to their requirements using the Programming Mode.
NOTE: Monitoring gas concentrations continues during Programming
Mode, but pauses during Calibration. Datalogging also pauses during
Programming Mode, but resumes when programming is finished.
Press
N/-
Press
Y/+
Press
MOD E
for desired menu
to answer “no”
to decrease a digit
for desired submenu
to answer “yes”
to increase a digit
to return to the sensor name/
instantaneous reading display
to exit a submenu
to advance digits
To enter the Program Mode, press M and [N/-]
N/- together until the first
program menu appears: “Calibrate Monitor?” Refer to Getting Started on
page 5. The figure on the following page summarizes the programming
menus and how to navigate through them.
M O DE
Program Mode 19
g
g
Sensor Name / Instantaneous Readings
MODE & N/MODE
Calibrate Monitor?
Y/+
N/-
Fresh Air Calibration?
Multiple Sensor Calibration?
Single Sensor Calibration?
Modify Span Gas Value?
Change LEL / VOC Span Gas?
Y/+ or N/-
MODE
MODE
Change Alarm Limits?
Y/+
N/-
Change
Change
Change
Change
High Alarm Limit?
Low Alarm Limit?
STEL Alarm Limit?
Average Alarm Limit?
Y/+ or N/-
MODE
MODE
Change Datalog?
Y/+
N/-
Clear All Data?
Change Datalog Period?
Select Data Type?
Enable / Disable Datalog?
Select Memory Full Type?
Y/+ or N/-
MODE
MODE
Change Monitor Setup?
Y/+
N/-
Change Site ID?
Change ID Mode?
Change User ID?
Change Alarm Mode?
Change User Mode?
Change Real Time Clock?
Change Backlight Mode?
Change Password?
Change Pump Speed?
Change Averaging Method?
Change Display Language?
Set Temperature Unit?
Y/+ or N/-
MODE
MODE
N/-
Change Sensor Configuration?
Y/+
Change LEL / VOC Gas Selection?
Enable / Disable Sensor?
Change Dilution Ratio?
Change PID Lamp Type?
20 Program Mode
Y/+ or N/-
MODE
Security Levels
Security levels are setup via computer using ProRAE Suite. The
default password is: 0000. NOTE: For security purposes “0000” always
appears instead of actual password.
No changes will be saved unless the user is in the correct mode with
the correct security level.
User Mode
Security Level
Calibrate Monitor?
0
Text
1
2
0
Display
1
2
Advanced
0
1
2
Fresh Air Calibration?
Multiple Sensor Calibration?
Single Sensor Calibration?
Modify Span Gas Value?
Change LEL/VOC Span Gas?
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
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* Need password
#
No change allowed
Change High Alarm Limit?
Change Low Alarm Limit?
Change STEL Alarm Limit?
Change Average Alarm Limit?
Change Datalog?
Clear All Data?
Change Datalog Period?
Select Data Type?
Enable/Disable Datalog?
Select Memory Full Type?
Change Monitor Setup?
Change Site ID?
Change ID Mode?
Change User ID?
Change Alarm Mode?
Change Alarm Mode?
Change User Mode?
Change Real Time Clock?
Change Backlight Mode?
Change Password?
Change Pump Speed?
Change Averaging Method?
Change Display Language?
Set Temperature Unit?
Change Sensor Configuration? 
Change LEL/VOC Gas Selection?
Enable/Disable Sensor?
Change Dilution Ratio?
Change PID Lamp Type?
*#
*
*#
*#
Program Mode 21
Calibrate Monitor
Fresh Air Calibration? Refer to Calibrating the Monitor on page 5.
Multiple Sensor Calibration? Refer to Calibrating the Monitor.
Single Sensor Calibration? Refer to Calibrating the Monitor.
Oxygen Sensor Calibration: The oxygen sensor calibration is slightly
different from other sensors; span calibration at 20.9% O2 is perormed
during fresh air calibration. During single sensor calibration, the
oxygen sensor can be calibrated to 0% O2 with pure nitrogen gas, by
Y/+ when asked “0%? Oxygen?” To calibrate at a different
pressing [Y/+]
N/concentration specified in Modify Span Gas Value, press [N/-].
NOTE: After a single sensor oxygen calibration, perform fresh air
calibration to ensure the oxygen sensor is calibrated correctly.
Modify Span Gas Value?
The span gas is the second point of reference for calibration. Users may
modify the span values of the standard calibration gases to use other
calibration gases. However, DO NOT modify the span values when
using the RAE Systems calibration gas supplied with the monitor.
Change LEL/VOC Span Gas?
Change the type of calibration gas from methane (LEL) and isobutylene
(VOC) to be used as the span gas during LEL or VOC gas calibration.
However, DO NOT modify the span gases when using the RAE
Systems calibration gas supplied with the monitor.
Change Alarm Limits
Users may change the alarm limits for each sensor. Use [N/-]
N/- to cycle
Y/+ to enter a submenu. To
through the submenu options. Press [Y/+]
Y/+ and [N/-]
N/- to change the value. Use M to
modify the limit, use [Y/+]
move from character to charater.
M O DE
To escape the submenu without saving changes, press M . To save,
Y/+ to save changes, otherwise
press M until “Save?” appears. Press [Y/+]
press [N/-]
N/- to discard changes.
M O DE
M O DE
Change High Alarm Limit?
Change Low Alarm Limit?
Change STEL Alarm Limit? (Short Term Exposure Limit)
Change Average Alarm Limit? (TWA – Time Weighted Average)
22 Program Mode
Change Datalog Setting
The monitor calculates and stores the gas readings at specified
intervals, which can be reviewed by the user. Users may also program
additional datalog options for the monitor through the computer.
Clear All Data?
Erase all data stored in the non-volatile memory, but does not delete
the PEAK, MIN, STEL, TWA displayed values, which are stored
separately.
Change Datalog Period?
Program the datalog period from 1 second to an hour (3,600 seconds).
Select Data Type?
Store either the average (TWA) or peak value for each datalog interval.
If peak values are selected, average values like STEL and TWA will not
be selected.
Enable/Disable Datalog?
Enable or disable the datalogging function for each sensor. If a * is
displayed next to a sensor name, data will be recorded. Use M to move
from sensor to sensor. An asterisk (*) means the sensor is enabled; no
Y/+ to select or press
asterisk means the sensor is disabled. Press [Y/+]
N/- to deselect. To save changes, press M until “Save?” appears.
[N/-]
Y/+ to accept. Otherwise, hold M to escape and cancel
Then press [Y/+]
changes.
M O DE
M O DE
M O DE
Select Memory Full Type?
The instrument’s memory can store about 3 days’ worth of data, as a
result of continuous monitoring at 1-minute intervals. Users may select
one of two types of memory storage:
Wrap-around: after the memory becomes full, the latest data
overwrites the oldest data. e.g. the most recent 3 days’ worth of data
is stored.
Stop: halts datalogging when the memory is full, and the “MEM”
alarm sounds. e.g. the first 3 days’ worth of data is stored.
Program Mode 23
Change Monitor Setup
Change the monitor setup or enter user information for the monitor. Use
Y/+ and [N/-]
N/M to move the cursor from character to character. Use [Y/+]
to toggle up and down the alphabet and numbers. To save, press M
Y/+ to save changes, otherwise, press
until “Save?” appears. Press [Y/+]
N/- to discard changes. To escape this menu without saving changes,
[N/-]
press and hold M .
M O DE
M O DE
M O DE
Change Site ID?
Enter an eight-character alphanumeric site identification, which is
included in datalog reports.
Change ID Mode?
Set up an identification code to use during start-up or to access a
previously saved customized ID.
Change User ID?
Enter an eight-character alphanumeric user identification, which is
included in datalog reports.
Change Alarm Mode?
Choose either latched or automatic reset. The user must manually
acknowledge a latched alarm by pressing [Y/+]
Y/+ .
Change User Mode?
The three different user modes are: Text, Display and Advanced.
Change Real Time Clock?
Change or update the real time clock and calendar.
Change Back Light Mode?
Automatic – the monitor turns the back light on/off when ambient
light falls below/above the threshold or Manual – press [N/-]
N/- to turn
the back light on/off.
Change Password?
Modify the password.
24 Program Mode
Change Pump Speed?
Low – (default) use when operating conditions are slow to change;
prolongs pump motor life, LEL sensor life and battery run time.
High – use for long lengths of tubing or when rapid changes in input
conditions are expected, such as HazMat response or when used for
measuring heavy, low vapor pressure compounds like jet fuel.
Change Averaging Method?
Choose: TWA (default) – an eight-hour Time Weighted Average or AVG
– the running average
Change Display Language?
Choose English or Spanish.
Set Temperature Unit?
Choose Celsius or Fahrenheit to measure temperature.
Change Sensor Configuration
Change LEL/VOC Gas Selection?
Choose an LEL or VOC gas listed in the monitor to calculate its
correction factor relative to the LEL or VOC calibration gas. Refer to
Correction Factors on page 26. The correction factor allows the unit to
display the equivalent concentration of the selected LEL or VOC gas. To
create a custom factor for a specific gas or mixture of gases, modify the
relative correction factor to increase or decrease the gas reading.
Enable/Disable Sensor?
Enable or disable sensor(s); a disabled sensor will not measure or
display the gas concentration. Use if a sensor has failed or is providing
erroneous readings. Use M to move from sensor to sensor. An asterisk
(*) means the sensor is enabled; likewise, no (*) means the sensor
N/- to deselect. To save
is disabled. Press [Y/+]
Y/+ to select or press [N/-]
changes, press M until “Save?” appears. Then press [Y/+]
Y/+ to accept.
Otherwise, hold M to escape and cancel changes.
M O DE
M O DE
M O DE
Program Mode 25
Change Dilution Ratio?
Attach an optional dilution fitting on the gas inlet port to dilute the gas
sample. Enter a dilution ratio (from 1 to 10) to compensate the reading
for the actual gas concentration.
Change PID Lamp Type?
This only applies to PID monitors. The PID sensor can utilize either
a 10.6 eV or an 11.7eV UV. Since each lamp type has a different
correction factor table, it is important to select the correct lamp type.
Correction Factors
VOC and LEL sensors respond to a broad range of gases and show
a different sensitivity to different gases; correction factors allow
measurement of a specific gas (the measurement gas) while using a
different gas for calibration (the calibration gas). The correction factor
(CF) for a measurement gas is defined as:
CF = Sensitivity to a Calibration Gas ÷ Sensitivity to a Measurement Gas
To convert the monitor reading of the calibration gas to the true
concentration of a measurement gas, use the following equation:
True Concentration (ppm) = CF x Monitor Reading (ppm)
The monitor has three sets of correction factors, one for the LEL and
two for the VOC (10.6 eV and 11.7 eV) Each set consists of 20 to 40
different gases. Specify the PID lamp type (e.g. 10.6 eV or 11.7 eV) to
access the proper VOC correction factor.
To set up a correction factor, first choose a calibration gas in the
Calibrate Monitor program menu and then choose a measurement
gas in the Change Sensor Configuration menu. If the calibration gas is
different from methane for LEL or isobutylene for PID, then the new CF
is calculated and the displayed value will be different from the values in
Technical Notes 106 or 156.
NOTE: Correction factors provide an estimate of the measurement gas
concentration. For greatest accuracy, it is necessary to calibrate the
LEL or VOC sensor directly with the measurement gas.
Refer to Technical Note-106 Correction Factors and/or Technical Note156 LEL Correction Factors.
26 Program Mode
Diagnostic Mode
The monitor is equipped with a diagnostic mode that can display
critical, low lever parameters to help users identify problems. Refer to
Troubleshooting on page 38.
! The diagnostic mode allows the user to set several low level parameters
which are very critical to the operation of the monitor. Extra care
should be taken when setting these low level parameters. If the user is
unfamiliar with these parameters and sets them incorrectly, it may cause
the monitor to shut down or malfunction. The diagnostic mode should
only be used by qualified personnel.
To switch the monitor to diagnostic mode, turn the monitor off.
Y/+ and M together; release both keys when the unit
Press and hold [Y/+]
beeps. The monitor is now in diagnostic mode.
M O DE
Press M until the desired diagnostic parameter appears:
M O DE
Sensor Name and Raw Sensor Readings
If a sensor is programmed and is properly installed, the sensor name
should appear. If the sensor name does not appear, then the sensor
may be improperly programmed or defective. The raw sensor reading
is the uncalibrated output for each sensor. When fresh air is applied,
the raw sensor readings should be 200 to 700 for toxic gas and VOC
sensors; 100 to 1300 for the LEL sensor; and 1200 to 2300 for the
oxygen sensor. When calibration gas is applied, the raw sensor readings
should increase or decrease by the amounts listed in Technical Note 123 Special Diagnostic Modes. If the raw sensor readings are outside
the normal range or do not change when gas is applied, the sensor or
monitor may be defective.
RF Test (Radio Frequency)
This feature applies when the monitor is used with the RAELink Remote
package. The RF test shows the successful rate of communication.
Adjust Lamp Failure Threshold
If the lamp physically appears fine, but the “Lamp” error message
appears during normal operation, the lamp failure threshold may be set
too high.
Diagnostic Mode 27
To adjust the level:
Turn the monitor on in diagnostic mode and go to the “Lamp = xxx, Fail
= yyy +/-” display. (“xxx” is the lamp current reading; “yyy” is the value
of the lamp failure threshold.)
Decrease the “yyy” value until it is about 10 counts below the “xxx”
value. Press M to exit.
M O DE
Then press [Y/+]
Y/+ to save changes, or press [N/-]
N/- to discard changes.
Battery Type and Bias
The type of battery (Lithium-Ion battery pack or alkaline battery
adapter) used to charge the monitor is displayed. Some toxic gas
sensors require a bias voltage of a few hundred millivolts for the sensor
to function properly. These include NO and NH3 sensors.
To manually switch the bias voltage supply on, refer to Special Bias
Voltage for Toxic Sensors on page 35.
Install a biased sensor in the TOX1 socket. If the bias voltage is
switched on, the bias reading should be below 182, otherwise it may
be defective.
Show x1 and x10 Range of PID Sensor (PID detectors only)
The PID sensor is connected to two amplifiers with two different gains:
unity gain and gain of ten; these are the raw outputs of both amplifiers.
When fresh air is applied, both amplifier outputs should be 200 to 500.
When a VOC gas is applied, both amplifier outputs should increase;
the amount of increase for the unity gain (x1) should be 1/10 of the
increase for the gain of ten (x10). If the increase does not agree with the
expected value, then the gain switch of the amplifier may be defective.
Display Contrast
Y/+ to increase the contrast and [N/-]
N/- to decrease the contrast.
Press [Y/+]
The LCD contrast bar indicates the current setting. If the display
Y/+ a few times to see the display
appears to have dark lines, press [Y/+]
more clearly. NOTE: In extreme temperatures, the display may fade or
bleed out.
LEL Power
The top line indicates the instantaneous reading of raw counts from the
LEL sensor. The bottom line shows if the LEL sensor is on or off. Press
[N/-]
N/- to turn the power off, and press [Y/+]
Y/+ to turn the power on.
28 Diagnostic Mode
Clock, Time, Battery, and Temperature
This display shows the real time clock, the date, the battery voltage in
raw count and temperature sensor reading.
Sensor Expiration Date
The expiration date (month and year) for each installed sensor is
based on the manufacturing date and expected life of each sensor.
If the current date exceeds the expiration date for any sensor, the
performance of the given sensor cannot be guaranteed. It is strongly
recommended to replace the sensor immediately to ensure proper
operation.
Pump Stall
The “Pump = 20/20” reading is the minimum and maximum pump raw
count (RC), and “Stall = 40 +/-” is the pump stall threshold. The pump
stalls if the maximum raw count reaches the pump stall threshold, which
causes the pump to shut off. To determine the pump stall threshold:
[ (max RC when pump is free + max RC when pump is blocked) ] ÷ 2
To adjust the pump stall threshold, press [Y/+]
Y/+ to increase or [N/-]
N/- to
decrease the numerical value.
Back Light Threshold
Adjust the threshold for the LCD backlight to automatically turn on/off;
verify the threshold is 100, which is suitable for most situations.
Serial Number and Pump
Displays the monitor’s serial number and the pump status. If a pump
is installed and a pump speed control circuit is available, toggle the
display “Pump=Low/High” by pressing [N/-]
N/- . NOTE: Changes made are
only for testing the pump condition and are not saved to the nonvolatile
memory. Refer to Change Pump Speed on page 25.
Battery Duration Time
Use to test battery life and displays the last run time before the unit
turned itself off due to low battery.
Communicate with PC
Connect monitor to a personal computer to upload a configuration file
or download stored data.
Diagnostic Mode 29
Maintenance
! Power from the battery is flowing to the printed circuit board (PCB) and
sensors even when the power is off. Therefore, it is very important to
disconnect the battery pack before servicing or replacing sensors or
any components insides the monitor. Severe damage to the PCB may
occur if the battery pack is not disconnected before servicing the unit.
over
ck
ding cap
or
toxic sensors
lamp
LE
oxygen sensor
tor case
printed
board
30 Maintenance
Li-Ion Battery Pack
The factory supplied Li-Ion battery pack is designed to last for 10
hours of normal operation (without alarm or backlight conditions).The
rechargeable batteries have a 1-year warranty. Age, ambient
temperature, and heavy useage may impact battery life. Battery packs
will slowly drain even if the monitor is turned off. If the battery packs
have not been charged for 10 days, the battery voltage will be low. It
is recommended to fully charge the battery packs before going into the
field, and recharge the battery pack upon returning from the field.
! To reduce the risk of ignition of hazardous atmospheres, recharge
battery only in areas known to be non-hazardous. Remove and replace
battery only in areas known to be non-hazardous. Ne charger les
batteries que dans emplacements désignés non dangereux.
Replacing the Battery Pack
! To reduce the risk of ignition of hazardous atmospheres, recharge
battery only in areas known to be non-hazardous. Remove and replace
battery only in areas known to be non-hazardous. Ne charger les
batteries que dans emplacements désignés non dangereux.
Remove the monitor cover by loosening the two case screws, and then
unplug the battery pack from the battery jack.
Place a fully charged spare battery pack into the monitor.
Make sure the battery plug is connected securely.
Reattach the cover and tighten the screws.
Maintenance 31
Emergency Alkaline Battery Adapter
! The alkaline battery adapter supplied by RAE Systems is intrinsically
safe. The adapter is intended to be used in emergency situations
when there is no time to recharge the Li-Ion battery pack. The adapter
accepts 4-AA alkaline batteries to provide approximately 12-14 hours of
operation.
To install the adapter, remove the monitor cover. Remove the Li-Ion
battery pack from the monitor by carefully disconnecting the wires.
Install four AA alkaline batteries into the battery adapter, making sure
the battery polarity is correct.
Connect the battery adapter to the monitor. Make sure the wires are
placed inside the adapter, running between the batteries. Close the flap
over.
Install the battery adapter in the monitor.
The monitor automatically detects the alkaline batteries and will run
for 8-10 hours. Use the monitor once the alkaline battery adapter is
installed. Replace the alkaline batteries when spent.
32 Maintenance
Sensor Replacement
Under normal operating conditions, most sensors will lose their original
sensitivity after the expected operating life and eventually need to
be replaced. Each sensor has a non-volatile memory that has the
manufacturing and expiration dates, which appear during the warm-up
period or can be looked up in the diagnostic mode.
Warranties: Oxygen (O2), combustible gas (LEL), hydrogen sulfide
(H2S) and carbon monoxide (CO) sensors all have a 2-year warranty.
All other toxic sensors have a 1-year warranty.
NOTE: The Oxygen and the LEL sensors have assigned sockets.
These are identified on the PCB. High bias toxic sensors should be
installed in socket 1/A. Refer to Special Bias Voltage for Toxic Sensors
on page 35. Any toxic sensor can be installed in socket 2/B.
Replace the sensor when it fails to calibrate.
To replace sensor(s), turn the monitor off
and remove the cover.
Using the sensor puller, remove the sensor
to be replaced by carefully pulling straight
out.
Plug a new sensor into the empty socket.
Make sure the sensor pins are aligned with
the socket holes before firmly pushing the
sensor all the way down.
Replace the monitor cover.
Turn on the power of the monitor and
the newly installed sensors should be
recognized. Let the monitor run for 15
minutes before calibration.
Some sensors, like NO and NH3, require up to 24 hours on-bias in the
monitor prior to calibration and use. Refer to Techincal Note 114 Sensor
Specifications and Cross Sensitivities.
NOTE: Calibrate all sensors prior to use!
Maintenance 33
CO Sensor Charcoal Filters
CO sensors can be sensitive to hydrocarbons. To reduce or eliminate
this cross sensitivity, a charcoal filter is installed in the gas plate above
the CO sensor. The charcoal filter removes organic vapor crosssensitivity and will last 4-6 weeks under normal operation conditions
before it needs to be replaced. However, if the monitor is exposed
to high concentrations of VOC gases, the carbon filter needs to be
replaced more frequently. (P/N 008-3006-005, 5-pack; keep unused
filters sealed during storage.)
Refer to Technical Note-121 CO Sensor Cross-Sensitivity and Removal
with Charcoal Filter for cross-sensitivity data.
! The carbon filter used for CO sensors may lower the reading if used
on other sensors. Remove the filter if another sensor is replacing a CO
sensor in the monitor.
34 Maintenance
Special Bias Voltage for Toxic Gas Sensors
NO and some NH3 sensors require a special high bias. The bias pins are
located next to the PID sensor socket. Using the sensor puller, move the
stopper block from the “OFF” pins to the “ON” pins. The sensor ID and
bias voltage will be checked during the power on sequence. An error
message appears if the sensors are plugged into the wrong socket, or
if the bias voltage is disabled. Biased sensors require 24 hours on bias
before calibration.
“ON” position
three bias pins
(display side)
socket
1/A
socket
2/B
Maintenance 35
PID Sensor Cleaning/Replacement
During the course of normal operation, a film of gas vapor may build
up inside the PID sensor module and the lamp; the rate of build-up
depends on the type and concentration being sampled. As a guide, it is
recommended to clean the PID sensor module and lamp only when the
PID is malfunctioning.
Periodically cleaning the lamp window also removes film deposits and
restores lamp sensitivity. Exercise with care when cleaning the window
surface to avoid damage.
Turn the monitor off and remove the cover.
Remove the stainless steel shielding cap
for the PID sensor. Using the sensor puller,
remove the PID sensor by carefully pulling
straight out.
Dip the entire PID sensor into RAE Systems’
lamp cleaning solution (supplied in the Lamp
Cleaning Kit, P/N 081-0002-000).
shielding cap
! DO NOT store the methanol from the lamp
cleaning kit in the same case as the MultiRae
Plus, as long-term exposure to methanol can
damage electrochemical sensors.
It is highly recommended to use an
ultrasound bath for at least three minutes.
Then thoroughly air-dry the sensor.
PID sensor
P/N 008-3007-000
! DO NOT use heat to dry sensors.
DO NOT disassemble PID sensor.
If the lamp is operational, use a cotton
swab or lens tissue to clean the flat window
surface with GC grade methanol. If the lamp
does not turn on replace with a new lamp.
Avoid contact with the flat window surface.
lamp
Reinstall the PID sensor. Install the shielding
cap. Replace the monitor cover.
11.7 P/N 050-0011-001
Taking Care of the Lamp
! Never touch the window surface with fingers or anything which may
leave a film. Water will degrade window surfaces, especially the 11.7 eV
lamp window.
36 Maintenance
The 10.6 eV PID lamp has a 1-year warranty. The “Lamp” error is an
indication of a problem with the lamp current. A dirty or contaminated
sensor often causes high readings of the VOC sensor. A weak or
inoperative lamp often causes low readings or no response to test
gas. If the UV lamp is on while the error message persists, then it is
necessary to adjust the lamp threshold. Refer to Adjust Lamp Failure
Threshold on page 27.
Sampling Pump Replacement
The sampling pump is a positive displacement piston pump, which
needs to be replaced as it approaches the end of its life span. The
pump’s draw capability reduces significantly as it consumes a greater
amount of energy to keep running. The sampling pump has a 1-year
warranty. To replace the pump:
Turn the monitor OFF and remove the cover.
The sampling pump is attached to the cover.
Remove the single screw holding the pump to the cover.
Gently pull the pump assembly off the cover.
Replace with a new pump assembly and reassemble.
pump
cover
Maintenance 37
Troubleshooting
Technical Service: 1.888.723.4800 or email: Tech@raesystems.com
Problem
Possible Reason(s)
Possible Solution(s)
Cannot turn on
after charging
battery.
Defective battery.
Microprocessor hangup.
Charge or replace
battery. Disconnect then
reconnect battery to reset
computer. Otherwise,
install alkaline battery
pack. If that still does not
work, then call Service.
“Incorrect Year
- Check Clock!”
error message.
Battery has died and
there is a mismatch
between the date code
on the sensors and its
internal clock.
Press [Y/+]
Y/+ and reset
clock.
Cannot turn off.
Microprocessor hangup.
Disconnect and reconnect
battery to reset computer.
Reload firmware.
No LED or LCD
backlight.
Defective LED or LCD
backlight.
Check if backlight is in
manual mode. Otherwise,
call service center.
Lost password.
Forgot.
Use ProRAE Suite to
reset password.
Buzzer
inoperative.
Bad buzzer.
Setting could be in
special run silent mode.
Call authorized service
center.
Calibration error
message.
No calibration gas
input. Low sensitivity to
calibration gas.
Check standard gas flow
path or cylinder pressure.
Change calibration gas or
sensor.
“Voltage too
high” error
message, while
charging.
Battery fuse blown.
Check battery and
adapter.
Wrong AC adapter. AC
adapter not fully plugged
in.
“Bat” error
message.
Battery low.
Corrupted
characters.
38 Troubleshooting
Recharge battery.
High pump
noise.
No inlet suction.
Leaky inlet path.
Defective pump.
Check inlet connection.
Clean or replace pump.
Abnormally low
reading.
Bad calibration. Low
sensitivity to calibration
gas. Wrong span value.
Bad sensor. Low flow.
Recalibrate. Use stronger
span gas. Check span
value. Replace sensor.
Replace filters. Check
flow.
Abnormally high
reading.
Bad calibration. Wrong
span value. Dirty PID
sensor. Dirty filters.
Excessive moisture.
Recalibrate. Check span
value. Clean PID sensor
in methanol in ultrasound
bath. Replace filters. Dry
PID sensor.
Reading jumping Incorrect calibration gas. Calibrate the sensors. Use
around.
Wrong span value.
different calibration gas.
Change sensor.
Read a small
background
value.
Small background gas
level present. Sensor
zero drift or newly
installed.
Run fresh air calibration.
Wait for newly installed
sensor to stabilize.
“Lamp” error
message.
Wrong threshold. Weak
lamp. Dirty Sensor.
Adjust threshold. Clean or
replace lamp. Clean PID
sensor.
VOC reading
plateaus at
certain level.
Weak PID lamp. Dirty
PID sensor.
Replace lamp. Clean lamp
& PID sensor. Replace
filters.
Full scale
measurement
in humid
environment.
Dirty or wet sensor.
Clean and dry sensor.
Replace external filter.
Troubleshooting 39
Specifications
Size 4.65”L x 3.0”W x 1.9”H (11.8 x 7.6 x 4.8 cm)
Weight 16 oz with battery (454g)
Sensors Up to 5 sensors including:
• Photo-Ionization detector for VOCs, 10.6 eV
lamp standard
• Protected catalytic bead for combustible gases
• Interchangeable electrochemical sensors for
oxygen and toxic gases (2)
Battery • Interchangeable Li-Ion and alkaline battery packs
• Rechargeable units include lithium-ion battery pack
with internal smart charging, 120V AC/DC wall adapter,
and spare alkaline battery pack
Operating Hours • 14 hours continuous with Li-Ion (typical)
• Unit will run and charge simultaneously
Display 2 line, 16 digit LCD with LED backlighting automatically
in dim light or alarm condition
Keypads 1 operation and 2 programming keys
Direct Readout Instantaneous (up to 5) values:
• Oxygen as percentage by volume
• Combustible gas as percentage of lower
explosive level (LEL)
• Toxic gases and VOCs as parts per million by volume
(VOC scaleable using correction factors)
• High and low values for all gases
• STEL and TWA values of toxic gases and VOCs
• Battery and shut down voltage
• Date, time, elapsed time, temperature
Alarms 90 dB buzzer and fl ashing red LED to indicate exceeded preset limits:
• High: 3 beeps and fl ashes per second
• Low: 2 beeps and fl ashes per second
• STEL and TWA: 1 beep and fl ash per second
• Automatic reset or latching with manual override
• Additional diagnostic alarms and display messages for
low battery and pump stall
Datalogging 20,000 points (80 hours, 5 channels at one minute intervals) download to PC with serial number of unit, user ID,
site number, and calibration date
40 Specifications
Calibration Two-point fi eld calibration for zero and span gas
Sampling Pump Internal two-speed pump. Flow rates:
• Low: ~200 cc/min
• High: ~300 cc/min
Low Flow Alarm Auto shut-off pump at low fl ow condition
Temperature -4° to 113°F (-20° to 45°C)
Humidity 0% to 95% relative humidity (non-condensing)
Attachment Wrist strap and high-visibility rubber boot
Warranty Lifetime on non-consuming components (per RAE
Standard Warranty). 2 years for O2 , LEL, CO, and H 2 S
sensors. 1 year all other sensors. 1 year pump, 1 year
battery, 1 year for 10.6eV PID lamp.
EMI Immunity No effect when exposed to 0.43 mW/cm RF
interference (5 watts at 12 inches)
Intrinsic Safety U.S.A. and Canada: UL & cUL Class I, Division I,
Groups A, B, C, D, hazardous locations, Temperature
Code T3C
Europe: DEMKO 03 ATEX 0308256X; EEx ia d IIC T4
(w/ Battery P/N 500-0029); EEx ia d IIC T3 (w/ Battery
P/N 500-0037)
Range, Resolution & Response Time
(t90 for pump-equipped instruments)
Sensor
Range
Resolution
t90 (sec)
Presoak Time for
60-sec Cal
LEL
0-100% LEL
1%
15
None
VOC
0-200 ppm
0.1 ppm
10
None
VOC
200-2000 ppm
1 ppm
10
None
O2
0-30%
0.1%
15
None
CO
0-500 ppm
1.0 ppm
40
None
H 2S
0-100 ppm
1.0 ppm
35
None
SO2
0-20 ppm
0.1 ppm
35
None
NO
0-250 ppm
1.0 ppm
30
None
NO2
0-20 ppm
0.1 ppm
25
None
Cl2
0-50 ppm
0.1 ppm
60
60 sec
PH 3
0-5 ppm
0.1 ppm
60
60 sec
NH3
0-50 ppm
1.0 ppm
150
90 sec
HCN
0-100 ppm
1.0 ppm
200
170 sec
Specifications 41