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Power Products Guide
Section 2 Batteries
2.2.7 Servicing the
Nickel-Cadmium
Battery
2.2.8 Replacement of the
Battery Cable
2.3 Model 946 Lead-Acid
Battery
2-8
applications generally involve a deep or full discharge. If it does
occur, it is temporary, and you can reverse it by a deep discharge
and charge. If you discharge the battery to random depths,
charge for random amounts of time, and subject the battery to
various duty cycles, the memory effects will not be present.
This section covers replacement of the connect cable. You can
make this repair yourself. However, some familiarity with elec-
trical/electronic repair procedures is necessary. You must know
how to solder, make proper splices, and insulate them safely. You
must follow the color codes used to maintain proper polarity on
the battery after the repair. If you are not familiar with these
procedures, or are uncomfortable doing them, return the battery
to Teledyne Isco for repair. If the fuse is all right and only the
cable needs replacing, Teledyne Isco suggests making the repair
after the battery has been discharged.
If the cable on the nickel-cadmium battery is damaged or inoper-
ative, you can replace it in the field. Remove the screws holding
the battery cover. Lift the cover from the case to reveal the cable
connections. To make replacement easier, the connections are
outside the potting wax. To replace the cable, simply cut away
the old cable and splices, one wire at a time, and solder in a
replacement. Carefully insulate the exposed wires with shrink
tubing (preferred) or electrical tape. Replace the battery case
cover and screws.
When replacing a battery cable, be careful not to short the
leads from the battery together, or you may irreparably
damage the battery and you may also risk personal injury.
Insulate splices carefully. Replace only one wire at a time.
While the nickel-cadmium battery has traditionally been the
usual battery for powering Isco products, Teledyne Isco also
offers a 6.5 ampere-hour gelled-electrolyte 12-volt lead-acid
battery (see Figure 2-2). Either battery will operate an Isco
sampler, flow meter, portable pump, or other equipment satisfac-
torily, but there are differences in the charging and operating
characteristics of the lead-acid battery.
WARNING
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