Page 23 of 127
Operating Manual
OMGEM5KN – Iss. 5.1
Copyright – Geotechnical Instruments (UK) Ltd
Switching the analyser off
1) To switch off the analyser, press and hold the ‘On/Off’ key, at which point a clean air purge will be
carried out and the instrument will then switch off.
2) If for any reason the analyser ‘locks up’ and will not switch off in this manner, press and hold the
‘On/Off’ key for 15 seconds; this will force the instrument to switch off.
Instrument status icons
The following icons may be displayed on the instrument screen:
Battery charge state
Gives the operator an estimation of
the battery charge state. For example,
100% gives about 8 hours use in the
field and 50% would mean that there
is approximately 4 hours’ battery life
remaining.
Battery charge state
Indicates less than 2 hour of charge remaining.
Pump status
This icon is displayed along with a
counter showing the pump run-time.
This counts down where the operator
has specified the pump run-time; if
not it counts up; the icon turns red
when stalled.
Pump stalled
This icon is displayed when the pump stalls. The
instrument’s gas inlet (or outlet) may be blocked.
This warning is most commonly caused by a water-
logged or dirty sample filter. Change the sample
filter and check for obvious blockages in the sample
tubes. Alternatively, a small amount of adjustment
can be made to the low flow detection point to
compensate for minor changes in the performance
of the pump fitted to the instrument.
GPS signal strength
This icon shows the signal strength the
analyser’s GPS module is able to
provide. Full, okay and fair strength
respectively.
GPS failure
The GPS was unable to get a line of sight lock on
enough satellites. Or, it may be that it hasn’t had
time to get a lock.
This indicates when Bluetooth has
been enabled. The colour changes
from grey to blue when connected.
Language
This icon indicates the currently selected operating
language. This can be changed via the main menu.
Data logging
This icon indicates that the data
logging feature is in operation.
Service overdue
This icon indicates that the analyser is overdue for
its service.
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