8.
LOAD TEST:
NOTE:
DURING HEATING CAUSED BY A LOAD TEST, THE CARBON PILE MAY EMIT STEAM
AND ODORS THAT HAVE BEEN ABSORBED BY THE CARBON DISCS. THIS IS
NORMAL.
a. Adjust LOAD CONTROL knob CW to ½ the amps of the CCA rating of the battery (do not exceed 300 Amps
on a 24-Volt battery) under test for 15 seconds. During the 15-second load test, it may be necessary to adjust
the load to give the correct current. This is made necessary by the changing voltage of the battery & the
change in resistance of the tester.
b. At 15 seconds, with the ammeter still reading ½ the amps of the CCA rating, read the voltmeter. Release the
LOAD CONTROL knob and be sure that the ammeter returns to zero amps.
c.
Results:
MINIMUM ACCEPTABLE VOLTAGE
6 Volt
12 Volt
24 Volt
Battery Temperature
Degrees F.
4.8 9.6 19.2 70
4.7 9.4 18.8 50
4.6 9.2 18.4 35
4.5 9 18.0
25
4.4 8.8 17.6 15
4.3 8.6 17.2 5
4.25 8.5 17.0 0
NOTE: if smoke is emitted from any cell, the battery is defective regardless of meter indication.
d. If battery is okay, wait 15 seconds and read voltage. Recharge if below 75% state of charge.
e. To test two, six volt batteries, or two 12-Volt batteries in series, the jumper between the batteries must be
removed and each battery tested individually.
HOW TO DETERMINE CCA OF BATTERY:
If the CCA of a battery is unknown, it may be determined by a quick test.
a. Determine the temperature of the battery.
b. Check the chart in the load test section for minimum acceptable voltage for a battery of the determined
temperature.
c. Apply a load to the battery for 15 seconds while holding the voltage at the minimum acceptable level
determined in step b.
d. At the end of 15 seconds, read the current applied to the battery. Multiply by two to get the CCA rating of the
battery.
●
Do not exceed 300 Amps on a 24-Volt battery.
APPLICATION DATA:
9.
ALTERNATOR TEST:
Be sure battery in car tests good. Start engine with tester connected to battery. Allow engine to fast idle
approximately one minute to recharge battery. Voltage reading should be between 13.5 and 15.0 volts in most
cases. Cold battery and regulator temperatures may make the reading higher.
10.
STARTER CURRENT TEST:
Connect tester to battery. Be sure battery is fully charged. Ground the ignition by removing the coil cable from the
distributor cap. Ground the cable to the block with a jumper wire to prevent arcing of the high-voltage spark that
could cause a fire, shock you, or damage the ignition system. (On GM cars with HEI ignition, simply disconnect
the small lead connected to the BAT terminal on the distributor). Turn ignition switch on and allow starter to turn.
Do not crank engine more than 5 seconds. Read the voltage on VOLTS scale while cranking. With automobile
circuits OFF and with tester connected to battery terminals, adjust LOAD CONTROL knob to give voltmeter
reading the same as measured while cranking engine. Read amps on ammeter. The measured amps is starting
current of car.
