Battery Test Log

The battery test log should be used whenever a battery set is tested and a problem is suspected. Because battery testing is based on both specific data and comparison data the form will help identify specific batteries with a problem.

1. Check each battery and log information into table below:

   Battery Numbers	1	2	3	4	5	6	7	8
   Uncorrected Hydrometer Reading
   Cell Temperature Reading
   Temperature Corrected Hydrometer Reading

2. Look across the rows, comparisons between one battery and the rest of the set can be made.

3. By looking down the columns individual battery patterns can be identified.

4. Use formula to calculate results:

   • The following formula statements can be used to assist in determining the proper temperature correction to be added or subtracted to the uncorrected hydrometer readings. Formula statement 1 is to be used if the temperature of the electrolyte is above 26.7°C (80°F). Formula statement 2 is to be used if the temperature of the electrolyte is below 26.7°C (80°F).

     Formula Statement 1 is ____-80=____/10=____x .004=____ Add this number to your hydrometer readings.

     Formula Statement 2 is 80-____=____/10=____x .004=____ Subtract this number from your hydrometer readings.

   
   

5. Determining results:

   • If a battery set or battery consistently give good results, the battery set is good and any problem that may have initiated the testing is in some other vehicle operating system.
   • If a battery set or battery in a set consistently provides poor results, the battery set or battery within the set is bad and should be replaced.