GxT V044-01, Ferret 44 Battery Tester with Printer Manual - Manual (Page 6)

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Battery Test (Manual)
CAUTION
Wear Safety Glasses, Do not break live circuits at the battery
terminals, Avoid ac ci den tal ly shorting the insulated battery
terminal to any ground metal. Never put a wrench on a live
battery wire terminal. Burns may be the result. Dis con nect
the battery chassis cable fi rst.
1. Be sure the Load Knob is turned to OFF before con nect ing
the analyzer cables to the battery. Take note of the safety
pre cau tions on the back cover of this manual.
2. Connect the analyzer Battery Clamps to the battery
ter mi nals; Red to positive, Black to negative. The
cable jaw contact from each clamp must make a solid
con nec tion to the battery terminal to assure good voltage
mea sure ments and avoid sparks during load tests. Side
terminal bat ter ies may need special adapters attached to make solid con nec tions for high current load tests.
3. Press the Amps/Volts Test Button.
4. With the Amp Probe jaws closed and not around any wires, press the Zero Amps button until the Amps Display
shows “000”
5. Connect the Amp Probe around either analyzer load lead.
Open Circuit Voltage Test
Measure the open circuit (no load) stabilized voltage. A stabilized battery has no “sur face charge”, which means
that the electrolyte has had a chance to remix and shed gas bub bles after current fl ow has stopped. With less than
12.4 volts, fi rst recharge the battery.
Open Ckt. Volts 12.6 12.4 12.2 12.0
% of Charge 100 75 50 25
Load Test
1. Determine the battery load test amperes from the battery test specifi cation, 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. Watch the
battery voltage. After 15 seconds at the test amperage, or if the voltage goes below the min i mum value, turn
the load off. NOTE: The Load-on Lamp fl ashes 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 min i mum volt age from the table during the test the battery
is either dis charged 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 bat ter ies). When a battery is cooler than 70°F, the output voltage re quire ment is reduced to give equivalent
test con clu sions 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