D-1034-126̲DM508S/DM1008S/PDM508S英文
1. Never apply a voltage to the measuring terminal when the tester
is in the M
Ω
measuring range.
2. Prior to measurement, disconnect the measuring object (circuit)
from the power supply.
3. Prior to measurement, make sure no voltage is applied to the
circuit to measure by the AC600V range.
4. During measurement, a high voltage is generated. Do not touch
the test pin, clip and measuring object.
5. The tester and measured circuit have been charged by high voltage
immediately after the measurement. Be careful not to get electric
shock.
6. There is a possibility of an accident of electric shock. After the
measurement, be sure to discharge the high voltage charged in
the measuring object. (See 5.4 Discharge Function)
− 7 −
5.3
Measurement of M
Ω
(Insulation Resistance)
WARNING
CAUTION
1. When the measuring object is grounded (earth), a normal practice
is to connect the lead with clip (EARTH) to ground (earth) and the
lead with test pin (LINE) to the circuit. (When this connection is
used, a measurement value becomes smaller than a value
obtained by the reverse connection.)
2. To prevent a measuring error, keep the test lead connected to
the LINE side out of contact with the measuring object and ground
(earth).
3. The insulation resistance varies largely depending on temperature
and humidity. It is also influenced by a voltage to apply (measuring
voltage).
Normally as temperature, humidity and voltage increase, the
insulation resistance decreases.
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