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

7.5OVERLOAD 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.

7.6Display and Accuracy Voltage

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%.

Current

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

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

NOTE: This is NOT a measurement of actual battery amp hours, but a running display of how many amp hours the battery is currently accumulating.

Charge Time

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.

8.BASIC OPERATION

8.1BATTERY CHARGE ACCEPTANCE TEST

NOTE: This is NOT the same as a conductance test, for which the battery analyzers mentioned in paragraph 7.4 are used.

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.

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Schumacher 85-8100 instruction manual Basic Operation, Overload Protection, Battery Charge Acceptance Test