Charging - Teledyne 913 Installation And Operation Manual

Figure 2-1 Model 934 Nickel-Cadmium Battery

2.2.1 Charging

The battery has an internal fuse, rated at approximately 50
amperes, to prevent the possibility of fire or burns in the event of
a short circuit. If the internal fuse link blows, you will have to
return the battery to the factory for repair.
Do not test these batteries for charge by "sparking" the output,
and be extremely careful putting meter probes inside the out-
put connector. Any accidents resulting in a shorted output will
damage the battery in less than three seconds.
One battery manufacturer states that the short-circuit discharge
rate from a fully-charged nickel-cadmium battery can be as much
as 50 to 100 times "C." For the Isco Model 934 Battery, this
could be from 200 to 400 amperes of discharge current. Usually,
the resistance of the wires prevents so large a current from
leaving the battery, but it is a dangerous level, in any case. Cur-
rents this large can do extensive damage, mostly from the heat
generated. That is why the battery is fused.
You can recharge the nickel-cadmium battery with an Isco Power
Pack, an Isco Battery Charger, or with the Model 965 Five
Station Battery Charger. All these provide the proper current
(400 mA) for charging the batteries. To charge the battery,
connect the plug on the battery cable to the mating receptacle on
the power pack, or the connector on the charger. Leave the
battery on charge for 15 to 18 hours. The Five-Station Battery
Charger lets you charge as many as five batteries at once, and
lets you charge both nickel-cadmium and lead-acid batteries,
although not at the same time.
Never charge any battery inside a sealed container or enclo-
sure. Charging may release gases from the electrolyte. These
gases can generate dangerous pressure as they try to escape
Power Products Guide
Section 2 Batteries
CAUTION
CAUTION
2-5