Heath Consultants Gasurveyor 500 Series - Manual (Page 18)

GASURVEYOR 3-500 USER HANDBOOK
8
operation the ‘BAT’ alarm flag is displayed when
approximately 60 minutes of operating time remains at
normal temperature. The instrument may continue to be
used until it switches off automatically.
Rechargeable (NiCd) Battery Pack
The GMI rechargeable battery pack provides
approximately nine hours operational life, from fully
charged, at ambient temperature of 20
o C (68 o F). An
indication of the battery condition is displayed after power
on and during warm-up, with status shown as either OK
or LO. If LO condition is displayed, a maximum battery
operational life of 90 minutes remains. During operation
the ‘BAT’ flag is displayed when approximately 30
minutes operating time is left at normal temperatures. The
instrument will then turn off.
There are three GMI Battery Chargers: a Standard
Charger, a Flatbed Charger and a Smart Charger. The
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
A number of different filter types are available from GMI.
The minimum requirement is a cotton particulate filter
and a hydrophobic filter which are incorporated in the
probe handle assembly, supplied with the instrument.
Filters must be checked at frequent intervals and where
appropriate changed to ensure a clean sample path. If water