Reelmaster 3550−D/3555−D/3575−D Page 5 − 53 Electrical System
Battery Testing
1. Perform a high−discharge test with an adjustable
load tester.
This is one of the most reliable means of testing a battery
as it simulates the cold−cranking test. A commercial bat-
tery load tester is required to perform this test.
CAUTION
Follow the battery load tester manufacturer’s
instructions when using a load tester.
A. Check the voltage across the battery terminals
prior to testing the battery. If the voltage is less than
12.4 VDC, recharge the battery.
B. If the battery has been charged, apply a 150 amp
load for fifteen (15) seconds to remove the surface
charge. Use a battery load tester following the
manufacturer’s instructions.
C. Make sure battery terminals are free of corrosion.
D. Connect a battery load tester to the battery termi-
nals following the load tester manufacturer’s in-
structions. Connect a digital multimeter to the
battery terminals.
E. Apply a test load of 285 amps (one half the Crank-
ing Performance rating of the battery) for fifteen (15)
seconds.
F. Take a battery voltage reading after the load has
been applied to the battery for fifteen (15) seconds,
then remove the load. Record the voltage reading.
G. Using the following table, determine the minimum
voltage for the cell temperature reading
H. If the test voltage is below the minimum, replace
the battery. If the test voltage is at or above the mini-
mum, return the battery to service.
Minimum
Voltage
Battery Temperature
9.6 70F (and up) 21C (and up)
9.5 60F 16C
9.4 50F 10C
9.3 40F 4C
Electrical
System
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