Biogas Operating Manual
Page 16
Geotechnical Instruments (UK) Ltd
BMUK0001 / Issue 1
•
Press
to select “Zero Channel(s)”.
•
Press
to select “Zero CH4”.
•
“USER ZERO COMPLETE.” should be displayed.
•
Repeat for other channels if required (except O2)
Step 3: Zero O2 channels
•
Attach the calibration equipment as pictured above with gas mixture 2 and turn on gas at regulator.
Do not run the pump.
•
Allow the gas to flow through the unit for approximately two minutes or until reading stabilises.
•
Press
to select “Calibration Menu”.
•
Press
to select ”Zero Channel(s)”.
•
Scroll
to “ZERO O2”.
•
Press
to select “Zero O2”.
•
“USER ZERO COMPLETE.” should be displayed.
Step 4: Span CH4 and CO2 channels
Use Step 5 instead, when a 3 gas calibration mixture is available.
•
Continue to flow calibration gas or if the zero O2 step has not been required attach the calibration
equipment as pictured above and turn on gas at regulator.
Do not run the pump
.
•
Allow the gas to flow through the unit for approximately two minutes or until reading stabilises.
•
Press
to select “Calibration Menu”.
•
Scroll
to “SPAN CHANNEL(S)”.
•
Press
to select “SPAN CHANNEL(S)”.
•
Scroll
to “SPAN CH
4
@ 05.0%” (the value set previously).
•
Press
to select “SPAN CH
4
@ 05.0%”
•
“CALIBRATION COMPLETE” should be displayed.
Repeat for CO2:
•
Press
to select “Calibration Menu”.
•
Scroll
to “SPAN CHANNEL(S)”.
•
Press
to select “SPAN CHANNEL(S)”.
•
Scroll
to “SPAN CO
2
@ 05.0%” (the value set previously).
•
Press
to select “SPAN CO
2
@ 05.0%”
•
“CALIBRATION COMPLETE” should be displayed.
Go to step 6.
Step 5: Span CH4, CO2 and O2 channels
Alternative to Step 4 when a 3 component gas is available
Multi-gas option requires a mix with components of CH4,CO2 and O2, eg 40% CH4, 50%CO2, 10%
O2.
•
Press
to select “Calibration Menu”.
•
Scroll
to “SPAN CHANNEL(S)”.
•
Press
to select “SPAN CHANNEL(S)”.
•
Scroll
to “SPAN MULTI-GAS”
•
Press
to select “SPAN CO
2
@ 05.0%”
•
“CALIBRATION COMPLETE” should be displayed.
