3
WHILE FAN IS RUNNING, OR SWITCH IS IN “MANUAL” POSITION
. To safely remove clamps depress the FAN switch to “Automatic” and turn LOAD CONTROL
KNOB counter-clockwise as far as possible. Fan will automatically be OFF and then the clamps may safely be removed from battery.
6.
DETERMINE STATE OF CHARGE OF BATTERY
a)
Adjust LOAD CONTROL knob clockwise (CW) to 100 amps for 3 seconds. Adjust LOAD CONTROL knob counter-clockwise until the meter reads zero. Read Voltmeter.
b)
Results:
1.
Pointer in green zone - proceed to LOAD TESTER.
2.
Pointer in red zone to left of green zone - battery is tool low to test. Recharge & repeat procedure.
c)
Green band indicates a battery that is at least 75% charged.
7.
LOAD TEST
a)
Figure the value of one-half of Cold Cranking Amps (CCA) rating of battery to be tested.
b)
Adjust “LOAD CONTROL” knob to the one-half of the battery’s cold cranking amperage (CCA) rating using AMPERES LOAD meter as a reference. Hold this reading. During this 15 seconds interval the
amperage will probably change due to resistance changes in the cables, carbons and the battery. Readjust the LOAD CONTROL during this 15 seconds interval to maintain the amp figure required. At the end
of 15 seconds and with the load on, read the battery’s voltage on the volt scale. TURN THE LOAD CONTROL KNOB COUNTER-CLOCKWISE AS FAR AS POSSIBLE. (OFF)
c)
The voltage reading obtained from a battery changes in relation to the temperature of the battery and also in relation to the amperage being drawn from the battery. The “Battery Temperature Compensation”
given here and on the face of the tester gives the minimum voltage that should be obtained for the test procedure given. i.e.: The outside temperature is 60 degrees F. From chart note that the minimum volts for a
good battery is 9.5 at 60 degrees F. When at the end of the 15 second test you find that the battery’s voltage is equal to or greater than 9.5, the battery is good. When the voltage is 9.4 or less the battery is
defective.
In some cases a six volt battery is to be tested. To do this simply divide the minimum volts of the chart by two to obtain the voltage reference to be used.
When smoke is emitted from any cell of the battery, the battery is defective regardless of the test indications
BATTERY TEMPERATURE COMPENSATION 15 SECOND LOAD TEST
°C
21
€
16
10
4
-1
-7
-12
-18
°F
70
€
60
50
40
30
20
10
0
MIN. VOLTS
9.6
9.5
9.4
9.3
9.1
8.9
8.7
8.5
8.
STRESS TEST:
a)
To determine if a battery is adequate for an application, a stress test may be applied to a battery. Determine the maximum current draw, minimum acceptable voltage, and maximum cranking time of the vehicle in
which the battery is to be installed.
b)
Run a load test at the determined current and time and check that the battery voltage is above the
minimum required.
APPLICATION DATA:
ALTERNATOR TEST:
Be sure that the battery in the car, test is good. Start engine with tester connected to the battery. The charging voltage of the alternator should allow the pointer to fall in the green
zone. If the pointer is in the red zone to the left of the green zone, the voltage is too low to fully charge the battery. If the pointer is in the red zone to the right of the green zone, the voltage is too high and may damage
the battery.
NOTE:
In very cold weather, the alternator may read above 14.8 VDC. Check owner’s service manual.
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 high- voltage spark that could cause a fire, someone getting shocked, or damage to the ignition system. (On GM car with HEI ignition, simply disconnect the small lead connected to the BAT.
terminal on the distributor.) Turn ignition switch on and allow starter to run for 5 seconds. Read the voltage on the VOLT scale while cranking. With car circuit off and with the tester connected to the battery terminals,
adjust LOAD CONTROL knob to give VOLTMETER reading the same as measured while cranking engine. Read Amps on ammeter and the reading is the starting current of the car.
VOLTMETER:
The tester may be
used as a voltmeter to
troubleshoot electrical
problems on any 6 or
12 volt vehicle. Read
voltages on volt scale.
NOTE:
A static
charge may build-up
on the meter face,
causing the needle to
be off zero. For the
meter to read
correctly, this charge
must be neutralized.
Spray “Static Guard”
or equivalent on the
meter or wipe with a
cloth dampened with
soap and water.
WIRING
DIAGRAM
