GEM2000 Range Gas Analysers
OMGEMN1.41
Copyright 2009 Geotechnical Instruments (UK) Limited
Page 71
Step 9
Go on to the Calibrate CO Process
Always ensure that the CO channel has been zeroed before performing
the CO calibration operation.
Step 10
Attach the flow regulator with 100ppm CO mixture.
Do not run the pump.
Step 11
Attach the regulator to the inlet port.
Step 12
Allow the gas to flow through the unit for approximately two minutes or
until reading stabilises.
Step 13
Press
to enter the ‘Calibration Menu’.
Scroll
to ‘Span Channel(s)’.
Press
to select ‘Span Channel(s)’.
Scroll
to ‘Span CO @ 100ppm’ (the value set previously).
Press
to select ‘Span CO @ 100ppm’
‘CALIBRATION COMPLETE’ should be displayed.
Step 14
Go on to the Calibrate H
2
Process
Always ensure that the H
2
channel has been zeroed before performing
the H
2
calibration operation.
Step 15
Attach the flow regulator with 1000ppm H
2
mixture.
Do not run the pump.
Step 16
Attach the regulator to the inlet port.
Step 17
Allow the gas to flow through the unit for approximately two minutes or
until reading stabilises.
Step 18
Press
to enter the ‘Calibration Menu’.
Scroll
to ‘Span Channel(s)’.
Press
to select ‘Span Channel(s)’.
Scroll
to Span H
2
@ 1000ppm’ (the value set previously).
Press
to select ‘Span H
2
@ 1000 ppm’.
‘CALIBRATION COMPLETE’ should be displayed.
Step 19
Remove the gas source.
Step 20
Start the pump and perform a clean air purge.
Step 21
Stop the pump.
Step 22
END
