2
22YM07
Westward Operating Instructions Manual
Battery Load Tester
NOTE:
Avoid dropping the battery tester as this could
cause damage, which may prevent it from working.
Operation
STORAGE & CARE
Clean the grips after each use and wipe off any
battery acid that may have come in contact with the
clamps to prevent corrosion. Clean the case with a
soft cloth to remove dirt and grease, and to keep the
finish looking new.
BATTERY LOAD TEST
This test evaluates the battery’s ability to crank an
engine. The tester draws current from the battery
while measuring its voltage level. The voltage level of
a good battery will remain relatively steady under load,
but a defective battery will show a rapid loss in
voltage. Battery size (CCA rating) and temperature
will affect test results – follow these instructions
carefully.
1. Turn off engine, accessories and battery test
equipment.
2. Connect negative (Black) clamp to the negative
(NEG. N. -) battery post. Connect positive (Red)
clamp to positive (POS. P. +) battery post. “Rock”
clamps back and forth to insure a good electrical
connection.
3. Please set CCA rating of tested battery by using
“SET CCA” switch. The default is 500 CCA, but you
can adjust to 600, 700, 800, 900, 999(1000), 300,
400 CCA by clicking this switch. At each change of
CCA rating, there is a short beep sound.
4. With clamps connected, tester’s digital will indicate
battery’s STATE OF CHARGE. If state of charge is
less than 12.0 volts, the battery should be
recharged before load testing. If recharging does
not bring voltage more than 12.0 volts, battery is
defective. If state of charge is more than 15.0 volts,
do not continue to test because the Battery Tester
is ONLY for 12V battery. If the digital display does
not show a digit, check for loose or reversed
clamps; otherwise battery is defective.
5. Note battery’s rating in Cold Cranking Amps (CCA).
If the rating is not printed on the battery, use the
following guideline to estimate battery size. Small (4
cyl) 300 CCA; Medium (6 cyl) 400 CCA; Large (8
cyl) 500 CCA.
6. For load test, depress the “LOAD” switch with the
red button instantly. (In this case, there will be a
long beep sound. The Battery Tester automatically
completes the load test for 10 seconds. Therefore,
it is not necessary to push the load switch manually
for 10 seconds.) For a load test completed for a
battery with less than 12 volts, the digital display
will show “-L-“. This means the battery should be
recharged, then refer back to No. 4. For a load test
completed for a battery with more than 15 volts, the
digital display will show “-H-“. This means you must
stop the test and refer to No. 4.
7. After load test of 10 seconds, a beep sound will
signal that the “load test is done.” At this moment,
you can refer load volt at digital display or LED for
status of load test
(for example: good, weak or bad).
If the load volt becomes below 7 volt, under “load
volt” test procedure, there will be “-L-” in digital
display, as mentioned in NO. 6.
8. After reading load volt, please refer to LOAD TEST
ANALYSIS section.
IMPORTANT:
If there is “Er1” message at digital display during load
test, the load cannot be applied, and the battery tester
will not work.
If there is “Er2” message at digital display during load
test, the load cannot be removed, and remove the
clamps from the battery immediately.
CHARGING VOLTAGE TEST
This test measures the output voltage of the
alternator/regulator. Check for under or overcharging
– which leads to poor battery performance and short
life.
IMPORTANT:
Engine should be at normal operating
temperature.
1. Connect tester clamps to battery as described in
No. 1 and No. 2 under Battery Load Test.
2. Turn off all lights and accessories. Operate engine
at fast idle (approximately 1500 RPM).
3. Do not operate tester’s load switch.
4. Read the display voltage and compare it to the
following three results: