Industrial Batteries & Energy Storage
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Chapter 3 Measurement
TO ENSURE SAFE MEASUREMENT, BE SURE TO READ THIS SECTION PRIOR TO MEASURING.
Observe the following to avoid electric shock and short circuits!
Do not measure voltages of 60V DC or higher.
Do not measure grounded voltages of more than 70V DC.
Do not measure alternating current.
Note that the instrument may be damaged if the applied voltage or current
exceeds the measurement range.
After measuring a high-voltage battery, before continuing to measure a low-
voltage battery first short the test leads together. This will discharge the DC
elimination capacitor which is connected across the leads. Otherwise an excess
voltage may be applied to the low-voltage battery, which may cause damage.
Internal battery resistance varies considerably depending on charge or discharge
status. In order to increase measure under similar conditions.
Lead-acid batteries (subjects of measurement) have high levels of terminal
resistance. For this reason, resistance values may differ between the case side
and the tip of a terminal. Be sure to connect the test lead to the terminals at a
fixed location.
To measure battery temperature, use the optional Clip Type Lead with
Temperature Sensor or, for safety purposes, a non-contact thermometer such as
a radiation thermometer.
Measurement may be impossible for insulated terminals, due to an insufficient
flow of current for measurement. In such a case, clean the terminal (removing the
insulation) before measurement.
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