GENERAL INFORMATION CU800 Service Manual
20
An Insulation tester (Figure 34) is an essential
tool for electrical system diagnosis. Insulation tester
is suitable for insulation test in maintenance, repair,
test and verification of various electrical equipment.
Insulation tester is used to test the insulation
resistance between electrical components or
different Voltage system. In order to ensure that
these equipment, electrical appliances and lines
work in a normal state and avoid accidents such as
electric shock casualties and equipment damage.
Such requirements are noted when applicable.
1. Make sure the meter battery is in good condition.
2. Make sure the meter probes are in good
condition.
WARNING:
·
High Voltage Danger: High voltage electrical
hazards may cause serious injuries and be life-
threatening. The user must wear insulating gloves.
Irrelevant personnel are not allowed to approach
the test area during the test.
1.9.3 Multimeter
A multimeter (Figure 34) is an essential tool
for electrical system diagnosis. The voltage function
indicates the voltage applied or available to various
electrical components. The ohmmeter function tests
circuits for continuity, or lack of continuity, and
measures the resistance of a circuit.
Some manufacturer’s specifications for electrical
components are based on results using a specific
test meter. Results may vary if using a meter not
recommended by the manufacturer. Such
requirements are noted when applicable.
1.9.4 Ohmmeter (analog) calibration
Each time an analog ohmmeter is used or if the scale is changed, the ohmmeter must be calibrated.
Digital ohmmeters do not require calibration.
1. Make sure the meter battery is in good condition.
2. Make sure the meter probes are in good condition.
3. Touch the two probes together and observe the needle location on the ohms scale. The needle
must Align with the 0 mark to obtain accurate measurements.
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