Battery High Rate Discharge Test

BATTERY HIGH RATE DISCHARGE TEST

(dealers without midtronics)







The purpose of this test is to ensure that the battery is in a satisfactory condition for service. (This is a severe test for the battery and generally indicates the ability of the battery to perform under heavy load) It will determine if the battery can perform under such loads that it may have to deal with when starting in cold conditions for example.

NOTE: You should remove the battery from the vehicle when carrying out a High Rate Discharge test because it is essential that the battery is fully recharged subsequent to this test.

Perform an open circuit voltage test Open Circuit Voltage Test
Open circuit voltage - 12.5 volts or above and with a room temperature of 20 degrees C

Connect the high rate discharge tester as follows:
- Connect the testers red lead to the positive and the black lead to the negative battery leads.
- Set the current at 300 amps for new vehicles and new batteries, for 15 seconds OR 210 amps for in service vehicles and in service batteries.
- The voltmeter should read 9.6 volts or above after 15 seconds have elapsed.
- Enter the reading obtained on to the battery report form. Battery Report Form (Diagnosis)

The Battery must be charged after this test.

If the voltage is 9.6V> at 20 degrees > throughout the 15 sec test period then the battery is serviceable.

With open circuit temperatures that differ from those recommended for testing refer to the table below.

�K: