8
Operating the MultiRAE Plus
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.
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.
MODE
Single Sensor Calibration
Press [Y/+] .
When the installed sensors appear on the
display use
M
to move from sensor to sensor.
Press [Y/+] to select the highlighted sensor and
start calibration.
Apply span gas mixture and start gas flow.
The 60-second countdown timer appears.
Y/+
Y/+
MODE
TOX1
VOC
TOX2
LEL
OXY
TOX1
VOC
TOX2
LEL
OXY
CO █OC H
CO █OC H
2
S
LEL pick OXY
Single Sensor
Calibration?
TOX1
VOC
TOX2
LEL
OXY
Span Cal done!
Turn off Gas!
NOTE:
Some sensors (Cl
2,
PH
3
, NH
3
, 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/+] to start calibration.
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.
Y/+
