• | J 39200 Digital Multimeter |
• | GM P/N 12303040 GM P/N 12303040 |
Caution: Batteries produce explosive gases. Batteries contain corrosive acid.
Batteries supply levels of electrical current high enough to cause burns.
Therefore, in order to reduce the risk of personal injury while working
near a battery, observe the following guidelines:
• Always shield your eyes. • Avoid leaning over the battery whenever possible. • Do not expose the battery to open flames or sparks. • Do not allow battery acid to contact the eyes or the skin. - Flush any contacted areas with water immediately and thoroughly. - Get medical help.
1.1. | If damage is noted, replace the battery. |
1.2. | Determine the cause of the damage and correct the problem. |
2.1. | A green dot (1) means the battery is ready for testing. |
2.2. | A dark dot (2) or when the green dot is not visible means the battery needs to be charged. Refer to Battery Charging . |
2.3. | A clear or yellow dot (3) means the battery is low on electrolyte. Replace the battery. |
Important: Do not load test a frozen battery. Replace the battery, if the battery is frozen.
3.1. | Install the GM P/N 12303040 on a battery with side terminals in order to ensure a good connection. |
3.2. | Measure the voltage across the terminals using the J 39200 . Replace the battery if the voltage is below 12 volts. |
3.3. | With the J 39200 still attached, connect a battery load tester across the battery terminals. |
Important: Do not complete this step if the battery has not been recently charged. |
3.4. | If the battery has been charging, apply a 300 ampere load for 15 seconds in order to remove the surface charge from the battery. |
3.4.1. | Remove the load. |
3.4.2. | Wait 15 seconds in order to let the battery recover. |
3.5. | Apply the load specified on the label of the battery or the load listed in Battery Usage . |
3.5.1. | Read the voltage after 15 seconds. |
3.5.2. | Remove the load. |
Important: Estimate the battery temperature by feel and by the temperature the battery has been exposed to in the proceeding few hours.
°C | °F | Minimum Voltage |
---|---|---|
21 | 70 | 9.6 |
10 | 50 | 9.4 |
-1 | 30 | 9.1 |
-10 | 15 | 8.8 |
-18 | 0 | 8.5 |
Below -18 | Below 0 | 8.0 |