GMI PPM Gasurveyor 500, User Handbook Manual

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PPM GASURVEYOR 500 USER HANDBOOK
10
Smart Charger has both slow and fast charge options as
well as a serial link for communications with the
instrument. See
Rechargeable Battery Pack
in Section 4
OPERATOR MAINTENANCE
.
Filters
The PPM Gasurveyor 500 has a cotton particulate filter
located behind the instrument inlet nozzle. The filter
should be checked at frequent intervals or when the
SAMPLE FAULT flag appears in the instrument display,
and where appropriate, changed to ensure a clean sample
path. In the event of the SAMPLE FAULT flag becoming
activated, the pump should be stopped as soon as possible
and the filter replaced. See Filter Replacement in Section
4 OPERATOR MAINTENANCE.
If SAMPLE FAULT still shows, after filter replacement,
the instrument will require to be returned for servicing.
Liquid Crystal Display (LCD)
The LCD shows the current gas readings in both analogue
and digital form together with operational and status
information. The display is protected by a toughened glass
cover. Backlighting is provided to enable the display to
be seen under low ambient light conditions.