3
22YM05
Westward Operating Instructions Manual
Battery Load Tester
Troubleshooting Chart
BATTERY ANALYSIS
(Meter Reading After 10s with Load Switch On)
LOAD TEST
BATTERY CONDITION
OK
(green band)
Battery capacity is good. May or may not be fully
charged. Check the state of charge by checking Specific
Gravity (SG) with a hydrometer. If SG is less than full
charge, check for possible charging system trouble.
Recharge battery to full level.
Weak or Bad
(needle steady)
Battery capacity is unsatisfactory. Battery may be
defective, or partly discharged. To determine which,
check SG. If SG is over 1.225, the battery is considered
defective. If SG is below 1.225, recharge battery and re-
test. If difference in cell to cell SG is greater than 0.025(2
points), cell trouble may exist. If charge does not bring
SG to full charge level, then battery is either sulfated, or
has lost its active material.
Weak or Bad
(needle failing)
Battery may be defective (i.e., a bad cell). For a quick
check, release load switch, and note volt meter reaction.
If voltage recovers to its full potential after only a few
seconds, the battery is probably defective. If the voltage
recovers slowly, the battery may only be very run down.
For more accurate results, check SG and follow above
procedure.
TEMPERATURE COMPENSATION
Battery temperature
0
℃
-10
℃
-20
℃
Decrease battery rating by
1 step
2 step
3 step
1 step = 200 cranking amps
Warranty
LIMITED ONE-YEAR WARRANTY
Should this product fail to perform satisfactorily due to a defect or poor workmanship within ONE YEAR from the date
of purchase, return it to the place of purchase and it will be replaced, free of charge. Incidental or consequential
damages are excluded from this warranty.
Manufactured for Grainger International, Inc.
100 Grainger Pkwy., Lake Forest IL 60045 U.S.A.
