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DO NOT attempt to start a vehicle without the battery properly installed. Damage may result

to the vehicle’s electrical system.

7.5  OVERLOAD PROTECTION

The charger uses an output circuit breaker and a thermal breaker to prevent overheating and

damage to the charger and the vehicle. If after repeated starting attempts, the charger does not

indicate any output on its meter, it may be because one of the two breakers has opened. If the

output breaker opens due to excessive current, a popping noise will be heard. It will automatically

reset itself in a few minutes. If the thermal breaker opens, it will automatically reset itself in about

15 to 30 minutes. Output over-voltage will show as 19.9 and the

FAIL LED will light.

•  Open circuit voltage between 12.0–13.0 is displayed to 0.1 V and is accurate to +/- 0.1 V at

DC levels.

•  Open circuit voltage below 12.0 or above 13.0 is displayed to 0.1 V and is accurate to +/- 2%.
•  Charging voltage is displayed to 0.1 V and is accurate to +/- 2%.

•  Below 10 A, current is displayed to 0.1 A and is accurate to +/- 0.3 A.
•  At 10 A or above, current is displayed to 0.1 A and is accurate to +/- 5%

•  Amp Hours are measured in whole units and represent the charge sent to the battery

•  In Battery Test Mode, the timer displays a countdown timer from 15 minutes to zero.
•  In Battery Charge Mode, the timer displays a total elapsed time.

a.  With charger

unplugged, set both dials to test mode (point to white battery illustration

boxes on each dial).

b.  Hook the cables to battery, red to positive (+) post and black to negative (-) post. (If polarity

is reversed, attaching the second clamp will cause a spark. Reverse the clamps.) The

battery voltage will appear on the front panel display, and the

PASS/FAIL LEDs will blink

alternatively until the 15 minute test time elapses.