multicomp pro MP700499, Руководство пользователя

Страница: 21 / 51

21
Chapter 3 Basic Measurement
Before measurement, be sure to read this chapter.
To avoid electric shock accident and short circuit, please operate the instrument as following:

Do not test the voltage over 70 VDC

Do not test the terminal-to-ground voltage over 70 VDC.

Do not test AC voltage.

If a voltage or current is applied beyond the rated range, the instrument will be damaged.

After measuring the high voltage battery, you should put the test leads together and make
them shored first, and then test the low voltage batteries. In this way, the power of DC
cutoff capacitance can be removed, otherwise the overvoltage may damage the
low-voltage battery.

Internal battery resistance varies considerably depending on charge or discharge status. To
increase measurement accuracy, make measurements under similar conditions (for
example, a fully charged battery).

Lead-acid batteries (measuring objects) have high levels of terminal resistance. For this
reason, resistance values may differ between the case and the tip of the terminal. Be sure
to connect the test lead to the terminals at a fixed location.

Use the optional Clip Type Lead with Temperature Sensor to measure the battery
temperature. Or, use a non- contact thermometer, such as a radiation thermometer, for
safety.

Measurement may not be possible for insulated terminals, due to insufficient flow of
current for measurement. In such a case, clean the terminal (remove the insulation) before
measurement.
3.1 Pre-operation Inspection