Battery Testing

Inspecting for battery specifications:

Make of battery: Lucds          Battery Number:X56C
Battery capacity in Cold Cranking Amps     CCA:550
Type of battery: ( Conventional, Maintenance Free, Gel Cell, Orbital, etc..)
Conventional
Can you get to the electrolyte? Yes
Explain how:  Using a 20c coin to unscrew the caps at the top of the battery.

Carry out visual checks:
Check all areas described in the above diagram for visual faults.
Are the terminals clean and tight? Yes
Does the battery show signs of swelling? ( Caused by over charging) No
Do any of the areas as described above require attention? No
What further action needs to be taken? No further action.

Check electrolyte levels:
Remove the battery cell covers (caps) and check all levels and record your findings on the chart below
Report electrolyte levels: (High, Ok, Low)

Cell           1          2          3          4          5          6 Level       OK      OK      OK      OK      OK      OK

Battery open circuit voltage (OCV) test:
Before doing the open circuit voltage test, there may be surface charge on the plates that must be removed. Surface charge voltage is excess voltage that can't be held over a period of time and is produced from charging the battery. On a vechicle surface can be removed by turning the head lights on for about a minute with the volt meter connected across the battery terminals.
The meter reading will fall and when you turn the lights off it will then start to rise.
When the meter stops rising this will be the true OCV.

Measure the terminal voltage across the battery
What range on the meter did you use? DC
What voltage result did you get? 12.60V
What is the state of charge? 95%
What voltage reading equates to 50% charged? 12.40V
Can you continue with the battery test? Yes
If battery is too discharged to load test, what further action should be taken?
The batteryshould be charged 10 hours slowly of 4 amps.
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Testing the battery electrolyte specific gravity:

Electrolyte specific gravity readings should be taken before the cells are topped up if possible. After topping up the battery, the specific gravity will be low.
To take a specific gravity readings introduce the hydrometer into the electrolyte and slowly squeezing the rubber bulb. Release the bulb slowly and watch the electrolyte rise up the tube until the float is floating. Check the colour of the fluid ( it should be clear, if it is murky it means that the plates are disintegrating; now take the reading on the float at the top level of the electrolyte ( fluid) and record your results on the chart below.

Record hydrometer test results and the colour of the fluid:

Cell               1               2               3               4               5               6
Reading     1250         1250         1250         1250         1274         1240
Colour       clear          clear          clear          clear          clear          clear
What is the specific gravity variation of your battery? 34 points

What is the allowable specific gravity variation specification of a battery? Max variation 50
Does the specific gravity vary in the cells of your battery? Pass
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High rate discharge test:
A load test should be performed to determine the battery's ability to supply cranking voltage, providing that the battery is at least 50% charged ( 12.4 volts open circuit voltage).
If less than 50% charged, then the battery should be recharged before a reliable load test can  be performed.

Note: Refer to pages 79 and 80 of Gregory's 50% of COA;minimum 9.5V. Electric's and Electronics to obtain spec's for below.

What load current are you going to apply? 275Amps.
What must the voltage hold above while load is applied? 9.5V
How long should load be applied? 10~15 second.
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Using a load tester:
When using a load tester ( high rate discharge tester)
Make sure the load control is off. On our tester turn the centre knob to decrease the load to a minimum this is off on there testers.
This can be either anti clockwise or clockwise depending on which tester you are using so refer to the machine.
Connect the positive lead to the positive terminal of the battery
Connect the negative lead to the negative terminal of the battery
Apply the specified load by turning the load control knob
Wait for the specified time and take voltage held and load current readings.
Turn off the load tester and disconnect the load tester's leads in the reverse order
Record your readings below
What was the voltage held while load is applied? 10.20V Pass
What was the load current held? 275Amps Pass
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Drain or Parasitic Draw:
When the vehicle is turned off , there should be little electricity flowing out of the battery. But if some device is still 'on', the battery may be discharged by this drain in just a couple of days. So the amps drain should be measured.
Be careful of removing the battery and losing memory in devices like radios and on-board computers. The radio may not work afterwards, or the vechicle may not run well. Try to connect the amp meter in series, without losing voltage to the systems that need to retain their memory. Or use a jumper pack to retain voltage to the systems while you connect the amp meter.

Check the amp fuse in your meter. Is it OK? It's Ok.

How did you check the fuse?
I used other meter, and put iy on Ohm then connect it to the meter being used which is on mA and checked if there is a reading in circuit.
Record radio stations in memory: not have radio stations.
Check the amp draw. Record here: 0m Amps
How many is OK？ N/A
Recheck radio stations. Was memory lost? N/A
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Battery Report:
Analyse your finding using a step process taken from the tasks that you have just performed and write them down in the area below.

What do you recommend needs to be done with this battery and system?
It's nothing needs to be done with this battery, the battery in good condition

If the terminals were corroded, how would you clean and protect them?

Sprinkle baking soda on the battery posts, the wires and the cables where ever corrosion is visible. Add water and wait a few minutes. Most of the corrosion will dissolve on contact. For remaining amounts, simply rub or brush with one of your chosen cleaning abrasives. Repeat as needed.

If the clamps or terminals are badly corroded at the battery, you can easily disconnect them. You may need pliers for this and/or wrenches to fit. Dry off the battery with a cloth to prevent splashing of the solution if you have already applied the baking soda. Disconnect the negative cable first, then the positive.

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Automotive battery testing assessment 
 Anslyse the condition of an antomotive battery
Vechicle type: Subaru
Model: Impreza          Year: 2009
Battery Number 55D23L

1. Determine the battery capacity in Cold Cranking Amps     CCA:500
2.Perform a visual check of  the battery
Report the areas that require attention? The battery looks good, no require attention
3. Determine what further action is required?
It's no action required.
4. Check electrolyte levels. (High, OK or Low)
Cell               1               2               3               4               5               6
Level           OK           OK           OK           OK           OK           OK
5. Perform an open circuit voltage ( OCV) test.
Open OCV test result? 12.7V
Interpret OCV result into state of charge as a percentage? 100%
Specify the voltage at which you can continue with the battery test?
Specified voltage           12.4V
6. Determine what further action should be taken at this point?
Nothing to do with the battery.
7. Perform specific gravity tests on all cells and report on the visual condition of the electrolyte?
Cell               1               2               3               4               5               6
Reading      1275         1275         1275         1265         1260         1250
Colour        clear          clear          clear         clear          clear          clear
What is the specific gravity variation of your battery? 25
What is the allowable specific gravity variation? 50
8. Perform a high rate discharge test.
Determine the load current to apply? 250A
Specify the voltage that the battery must hold above while load is applied? 9.5V
How long should load be applied? 10~15 seconed
9. Record your test results below
What was the voltage held while load is applied?
What was the load current held?
( When I did the test I can't remember the load current to apply and the voltage that the battery must hold above while load is applied so I was not allowed to do the test)
10. Analyse all of your results and document your findings and recommendations.
The battery looks good and the open circuit voltage test result in good condition, don't to be charged. The gravity variation of the battery was also good.