Associated Equipment 6039 - Manual (Page 4)

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.
11. MAINTENANCE:
A 9 volt battery provides power for each of the LCD digital meters. To increase battery life, turn the meters off when the
tester is not in use.
To replace the instrument batteries, turn the power switch to the OFF position. Remove the two screws on the battery cover
in the back of the cabinet. Replace both batteries with fresh alkaline batteries and replace the cover.