GxT V040-01, Battery Tester - Manual (Page 5)

CHASSIS
BLACK RED
BATTERY
SOLENOID
RELAY
STARTER
KEY SWITCH
TRANSMISSION
SAFETY
SWITCH
Connections For
STARTER TEST
STARTER TEST
When testing the starting system, first test for battery performance.
With a known good battery, the starter motor, cables and starter
solenoid can be checked. Starter amps should not exceed the
maximum specified for the vehicle being tested, and the cranking
RPM should be satisfactory.
1. Engine should be at normal
operating temperature. Make
sure all lights and accesso-
ries are off and vehicle doors
are closed.
2. Be sure the Load Knob is
turned to OFF before con-
necting the analyzer cables
to the battery. Take note of the safety precautions on the
back cover of this manual.
3. Connect the analyzer Battery Clamps to the battery termi-
nals; Red to positive, Black to negative.
4. With the Amp Probe jaws closed and not around any wires,
press the Zero Amps buttons until the Amps Display shows
“000”
5. Place the Amp Probe around either of the engines battery
cables.
6. Set the Volts Selector to Battery Volts.
7. Disable the ignition by either disconnecting its power, un-
plugging the coil primary, or grounding the coil secondary
wire.
8. Crank engine for 15 seconds with ignition key and note the
cranking amperage reading. Also, watch to see that the bat-
tery voltage stays above 9.6.V. Wait a few minutes for the
starter to cool if the cranking test is repeated.
1. Determine the battery load test amperes from the battery test
specification, CCA, or Ah ratings. To give consistent results
a load test requires that a battery be at least 75% charged
and not have been heavily used within the last 10 minutes.
Cold Cranking Amperes at 0°F. (CCA)
Use 1/2 the CCA for a load test. For example, 360 CCA divided
by 2 equals a 180 ampere test load.
Ampere Hour Rating (Ah)
Multiply the Amp Hour Rating by 3 to obtain the load. For
example, a 60 Ah battery times 3 equals a 180 ampere load.
2. Turn the Load Control Knob clockwise until the amps reading
gradually reaches the required load. While the load is being
applied, watch the battery voltage. After 15 seconds at the
test amperage, or if the voltage goes below the minimum
value, turn the load off. NOTE: The Load-on Lamp flashes
and beeps once per second. After 16 seconds of load
current, the beeper will sound continuously.
LOAD TEST CAUTION
If a battery smokes while being loaded, stop testing
immediately. It is not safe.
3. Test Conclusions. If the battery voltage went below the
minimum voltage from the table during the test the battery
is either discharged or defective. Recharge and test again if
necessary.
At 70°F and higher a good battery will maintain an output of
9.6 volts or more during the loading period (4.8 volts for 6 volt
batteries). When a battery is cooler than 70°F, the output voltage
requirement is reduced to give equivalent test conclusions per
the following table:
ELECTROLYTE TEMP. MINIMUM
——°F—— ——°C—— LOADED VOLTS
70 21 9.6
60 16 9.5
50 10 9.4
40 4 9.3
30 – 1 9.1
20 – 7 8.9
10 –12 8.7
0 –18 8.5
USE HALF VOLTAGE FOR 6 VOLT BATTERIES.