INTRODUCTION STE/ICER (SIMPLIFIED TEST EQUIPMENT FOR INTERNAL
COMBUSTION ENGINES-REPROGRAMMABLE) PROCEDURESContinued
The back of each card also has three sections. The upper left-hand block lists the possible VTM displays and explains their
meanings. This block suggests corrective action for the user. The right-hand side of the card contains battery test limits for
three common military batteries. These limits may be used if the carrier/equipment TM does not provide limits. The lower
left-hand portion of the card contains a table showing how to apply the limits to evaluate the battery condition and state of
BATTERY EVALUATION PROCEDURE
Use Procedures On Battery Test Card To Hook-up VTM.
The following information will enable the user to determine the correct tests:
Use series 73 and 75 for the following conditions:
(1) Testing a battery pack that is also powering the VTM.
(2) Testing a battery series pair that is also powering the VTM.
(3) Testing an individual battery that is the only battery in the circuit and is powering the VTM.
Use series 77 and 79 for the following conditions:
(1) Testing a battery pack that is not powering the VTM.
(2) Testing a battery series pair that is not powering the VTM.
(3) Testing an individual battery that is not the only battery in a circuit or is not powering the VTM.
Use Test Procedure On Battery Test Card To Complete Evaluation.
Evaluate battery condition using battery resistance change test (#75 or #79). Note the result.
Evaluate battery state of charge using the battery internal resistance test (#73 or #77). Note the result.
Compare test results to limits in carrier/equipment TM. If carrier/equipment TM does not have test limits, use test limits
provided in this section. If the battery internal resistance test passes, then the batteries are fully charged. If the
battery internal resistance test fails, then the batteries are not adequately charged. If the battery resistance change test
passes, then the batteries are good and will retain their charge. If the battery resistance change test fails, then the
batteries are bad and will not retain their charge.
If batteries are out of limits, perform one or all of the following:
(1) Check battery electrolyte level.
(2) Check battery connections and terminals. Clean or tighten if necessary. Check connections between VTM and
(3) Refer to carrier/equipment TM to check battery specific gravity.
(4) Repeat battery resistance change and internal battery resistance tests one time. If internal battery resistance result
(test #73 or #77) is out of limits, then charge batteries. If battery resistance change result (test #75 or #79) is out of
limits, then continue testing to isolate bad batteries.