Biogas Operating Manual
BMUK0001 / Issue 1
Geotechnical Instruments (UK) Ltd
Page 19
6.
Service
Your Biogas
instrument should be regularly serviced to ensure correct and accurate operation.
Geotechnical Instruments recommends a service and recalibration every 6 months.
The Biogas
instrument is ATEX certified for use in potentially explosive areas. As such it should be
serviced only by qualified engineers. Failure to observe this will result in the warranty becoming invalid
and could invalidate the ATEX certification.
Warning
If the Biogas
instrument is serviced by unqualified engineers the ATEX
certification may be invalidated and the instrument may be unsafe for use in a
potentially explosive atmosphere.
User serviceable parts
There are no user serviceable parts inside the instrument. Please do not attempt repair as this may
invalidate any warranty supplied with your instrument.
The following parts are supplied by Geotechnical Instruments and can be user serviced:
In line water filter
This should be regularly inspected for obstructions or damage and
changed if needed. The instrument should never be operated without the
in line water filter as this may result in water entering the instrument.
Particulate filter
The particulate filter is located on the underside of the instrument and is
accessed by removing the plastic plug. This can be removed by
unscrewing using a suitable sized coin. The filter should be replaced if it
is contaminated. Never operate the instrument without the particulate
filter. When replacing the plug be sure not to over tighten it - finger tight
is adequate.
Sample tubing
Always ensure that sample tubes are not contaminated or damaged.
QRC connectors
Periodically check that the O-rings on the QRC gas connectors are not
damaged. A damaged O-ring can let air into the sample gas and result in
incorrect readings. If the O-ring is damaged the complete QRC
connector should be replaced.
