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The MODEL 39
CAPACITY CHECKER discharges the battery,
using its internal resistor load and records on a LCD
display the time taken to do this. The higher the capacity
of the battery, the longer it will take to discharge
and therefore the greater will be the readout on the
display.
A front panel control is provided to
allow the battery being tested, to be discharged to
different levels to suit specific applications. The
control is marked 'SET FINAL BATTERY VOLTAGE' and is
scaled 9 to 12 volts. If an appropriate voltage to suit
your application is know, this should be used, although
10.5 volts is suitable in most situations (9.0 volts
for cell detect version).
The lower the voltage setting the greater
will be the depth of discharge during the test. To assess
the health of the battery, just compare the discharge
time obtained at the end of the test with that expected
from a good battery of the same capacity
(refer to chart for expected "good" time).
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