Load Testing a Battery Load Testing a Battery

SC4BSC4B

ObjectiveObjective

Student will determine the Student will determine the state of charge of a battery state of charge of a battery

and load test a battery and load test a battery in or out of the vehicle.in or out of the vehicle.

Do you need to buy a new battery?Do you need to buy a new battery?

MATERIALS REQUIREDMATERIALS REQUIRED

1. EYE PROTECTION1. EYE PROTECTION2. VOLT-OHM-METER2. VOLT-OHM-METER3. BATTERY LOAD TESTER3. BATTERY LOAD TESTER4. BATTERY4. BATTERY

ProcedureProcedure

CAUTION! CAUTION! Never Make Sparks or Flame by Battery Never Make Sparks or Flame by Battery

The Hydrogen Gas Given Off by the Battery isThe Hydrogen Gas Given Off by the Battery is

Explosive!Explosive!

STEP 1STEP 1WEAR EYE PROTECTION!WEAR EYE PROTECTION!

STEP 2STEP 2Determine battery voltageDetermine battery voltage

(Use 20 Volt DC Scale)(Use 20 Volt DC Scale)

Write It Down! Write It Down!

STEP 3STEP 3Determine State of ChargeDetermine State of Charge

Record Battery Voltage &Record Battery Voltage &EstimateEstimate Percentage of Charge & Record Percentage of Charge & Record

11.7 or Lower…………………0% Charge 11.7 or Lower…………………0% Charge 12.0 ………………………………….25% Charge12.0 ………………………………….25% Charge12.2 ………………………………….50% Charge12.2 ………………………………….50% Charge12.4 ………………………………….75% Charge12.4 ………………………………….75% Charge12.6 or Higher …………….100% Charge12.6 or Higher …………….100% Charge

IF BATTERY VOLTAGE IS BELOW 12.4 VOLTS,BELOW 12.4 VOLTS,BATTERY MUST BE CHARGED TO PROCEED!IF BATTERY VOLTAGE IS ABOVE 12.4 VOLTS,ABOVE 12.4 VOLTS,YOU MAY PROCEED WITH TEST!

STEP 4STEP 4Hook Up Battery Load TesterHook Up Battery Load Tester

Red to Positive(+)Red to Positive(+)Black to Negative -Black to Negative -

STEP 5STEP 5Load Test Battery for 10 SecondsLoad Test Battery for 10 Seconds

Note Voltage Reading @ 10 SecondsNote Voltage Reading @ 10 SecondsWhile Still Pressing the Button !While Still Pressing the Button !

STEP 6STEP 6ResultsResults

IF LOADED TEST VOLTAGE IS ABOVE 9.6 VOLTSIF LOADED TEST VOLTAGE IS ABOVE 9.6 VOLTS

IF LOADED TEST VOLTAGE IS BELOW 9.6 VOLTSIF LOADED TEST VOLTAGE IS BELOW 9.6 VOLTS

BATTERY PASSES TESTBATTERY PASSES TEST

BATTERY FAILS TESTBATTERY FAILS TEST

NOW, CLEAN UP! NOW, CLEAN UP!

CLEAN, SHUT OFF CLEAN, SHUT OFF & PUT AWAY & PUT AWAY

VOLT-OHM-METERVOLT-OHM-METER AND BATTERY TESTERAND BATTERY TESTER

FILL OUT YOUR FILL OUT YOUR SKILL SHEET COMPLETELYSKILL SHEET COMPLETELY

& GET IT SIGNED!& GET IT SIGNED!

QUESTIONS? QUESTIONS?

ASKASKINSTRUCTORINSTRUCTOR

THE END THE END