Biogas Operating Manual
Page 14
Geotechnical Instruments (UK) Ltd
BMUK0001 / Issue 1
5.3 Set-Up
Important
Do NOT attach the gas supply to the instrument before putting it into
the “Field Calibration Screen” by selecting ‘FIELD CALIBRATION’ from
the main menu.
Calibration
Gas
Canister
Flow
Regulator
Outlet
Exhaust
Outlet
Exhaust
The regulator’s flow is factory set. It only requires a few turns to open, but no adjustment is necessary.
Warning
Exhaust port
When the Gas Analyser is being calibrated, there are two possible
exits for the gas, via the usual manner out of the exhaust port of the
analyser or in cases of over-pressurisation the 1/16
”
port on the
pressure relief valve.
It is recommended that both ports have exhaust tubing attached.
The exhaust tubing must emerge in a well-vented area. Ensure there
are no leaks in the tubing and connections.
The calibration of the Gas Analyser should be carried out in a safe
area with all necessary precautions taken when using potentially
dangerous, explosive or toxic gases.
For each gas used the appropriate material data sheet should be read
and understood before proceeding.
5.4 Equipment
Calibration gas mixtures as specified as above in 58 litre gas canisters.
The regulator supplied by Geotechnical Instruments is recommended as flow and pressure rates are
factory set.