GMI Gasurveyor 11-500, User Handbook Manual

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GASURVEYOR 11-500 USER HANDBOOK
8
normal temperature. The instrument may continue to
be used until it switches off automatically.
Rechargeable 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 is drawn into the instrument any filter
which has been contaminated must be cleaned or