10
5.
CHANGE OF BATTERIES
Gas-Ranger detectors are powered by two (2) alkaline
(non-rechargeable)
D-size
batteries (1.5V, Type AM-3) or by two rechargeable batteries sold by Bascom-Turner. The
batteries are good for at least eight, and typically twelve, hours of continuous operation. When
the batteries are drained to about one hour of remaining continuous use, the display flashes
"Lo"
(low) between readings. If the batteries get very low, the display stays on
"Lo"
, and the batteries
must be changed to make the instrument operational again.
WARNING:
The batteries must be changed in an atmosphere known to be non-
hazardous
.
To change batteries:
1.
Turn selector switch to "OFF".
2.
Remove spent batteries.
a) Unscrew the battery cap and slide out two D-cells.
b) Discard two alkaline D-cells.
3.
Insert two, fresh D-size alkaline batteries.
4.
Replace the battery cap and give it one quarter turn (battery cap bar vertical).
Note that the batteries are inserted with the flat end (negative) terminal first.
If the instrument does not operate after battery replacement, there is a high probability
that a battery has been inserted with the wrong polarity. Re-insert the batteries taking extra care
to insert each battery correctly.
Note:
Always replace a set of batteries with a new set. Do not mix used and new batteries.
When operating in cold weather (below -10
o
C) use a fresh set of batteries, if possible.
WARNING:
Do not attempt to charge the alkaline (non-rechargeable) batteries because
they may leak or vent.
WARNING: Use only alkaline batteries or rechargeable batteries sold by Bascom-
Turner in a Gas-Ranger.
