BIOGAS 5000 gas analyser
OMBIO5KN4.1
Copyright Geotech
Page
55
of that site, a calibration check could be triggered if the readings measured are different
to what is expected.
Note: For assistance please contact Technical Support at Geotech on +44(0)1926
338111
9.3
Calibration gases
User calibration of a gas analyser will greatly improve the data accuracy in the range of
the calibration gases used. This may cause less accurate readings of concentrations
outside this calibrated range. Users should select the correct calibration gas for the
expected gas levels on their particular application.
To improve calibration at lower levels requires the use of gas mixtures 1 and 2.
To improve higher levels use gas mixture 3
.
For standard CO only 100ppm CO gas is needed.
For CO (H
2
compensated) both CO 100ppm and H
2
1000ppm gases are needed.
The following table indicates the different gas mixture canisters used for calibration:
Calibration gas
CH
4
CO
2
O
2
Mixture 1
5%
5%
6%
Mixture 2
5%
10%
0%
Mixture 3
60%
40%
0%
These are for general use but other gas concentrations can be used.
Note
:
Other gases could cause cross-gas effects. If you suspect a cross
sensitivity problem please contact the Technical Support Team at Geotech
on +44(0)1926 338111.
The above gases and most other gas concentrations can be supplied by
Geotech. For further information please contact Sales on +44(0)1926
338111 or email
Warning
Calibration gases can be dangerous.
For each gas used the appropriate material safety data sheet
must be read and understood before proceeding.
