Heath Consultants Gasurveyor 500 Series - Manual (Page 26)

GASURVEYOR 3-500 USER HANDBOOK
16
‘SAMPLE FAULT’
This indicates a problem with the instrument’s flow due
to the sample path being blocked, water ingress, a blocked
filter or pump failure.
In Measure and Purge mode, the pump stops
automatically. The sample line, filters etc. should be
checked for water ingress or blockage and Button One
should then be pressed to restart the pump.
‘CHECK ZERO’
This indicates 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’
This indicates 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’
This indicates that the batteries will soon require
replacement. At this point there will be approximately 60
minutes operation 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