GMI PPM Gasurveyor 500, User Handbook Manual

Page: 19 / 90

9
Batteries
Disposable Alkaline (LR20) Dry Cell Batteries
Alkaline batteries provide approximately 15 hours
operational life at ambient temperature of 20
o
C (68
o
F).
When the batteries are low or exhausted it is necessary to
fit 4 new batteries to reset the battery indicator to 100%.
Do not mix old and new batteries.
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 120 minutes remains. During
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 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
GENERAL INFORMATION