GMI Gasurveyor 500 Series, User Handbook Manual

Page: 73 / 102

C-3
OPERATOR MESSAGES / FAULT FLAGS
Various messages can appear on the LCD screen to indicate instrument status.
‘SAMPLE’ Indication that the pump is running and the instrument is sampling.
’OFF’ Indication that the instrument is about to switch off. This command can
be cancelled by a single press of any button.
‘SAMPLE FAULT’ Indication of a problem with the instrument’s flow due to
the sample path being blocked, water ingress, a blocked filter or pump failure.
In CSM mode the instrument will alarm and the pump will continue to run. The
sample path should be checked and Switch One pressed to clear sample fault.
In CGI mode the pump stops automatically. The sample line, filters etc. should
be checked for water ingress or blockage and Switch One should then be used
to restart the pump.
‘CHECK ZERO’ Indication that there may have been a zero shift due to the
presence of gas. Switch off the instrument and switch on again in fresh air.
‘ZERO FAULT’ Indication that the zero is outwith its calibration limits. Switch
the instrument off and then on again in fresh air. If the fault does not clear,
return the instrument for servicing.
‘BAT’ Indication that the batteries will soon require replacement. At this point
there will be approximately 60 minutes left in a set of alkaline batteries, although
this figure will vary depending on battery manufacturer, temperature conditions,
usage etc.
With rechargeable batteries the ‘BAT’ flag indicates approximately 30 minutes
operation left.
As the battery power continues to fall, the LCD flashes a ‘BAT FAULT’ message.
Subsequently the LCD displays ‘OFF’ and the instrument automatically switches
off. The batteries should be replaced immediately.
‘BAT FAULT’ Indication that the batteries should be replaced immediately.
‘STORE’ This flag is displayed when the instrument is in auto datalogging
mode and during manual datalogging (for approximately one second duration).
‘EEEE’ Indication that the measurement in the toxic ranges has risen above
999 (instrument over range). The ppm range autoranges to LEL / Volume Gas
and hence does not show this message. The message is also displayed if the
measurement falls below -99 (incorrect zero setting) in either the ppm or toxic
ranges.
‘1’ Indication, which can also appear after power on, that a calibration data
error has been detected. The instrument should be returned for servicing.
Gasurveyor 500 - Operating Instructions
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