Sanwa mg5000, Инструкция по эксплуатации, Страница: 12 / 28

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4. When the object measured is grounded, usually connect
the EARTH (ground) lead to the grounded side and the
LINE lead to the circuit (the value read with this method is
lower than that read with the reverse connection).
5. To prevent measurement errors, keep the LINE cord away
from the object measured and the ground whenever
possible. Particularly, when measuring high resistance of
100 GΩ or more, the reading can be stabilized by keeping
the test cord as apart as possible from each other.
6. The insulation resistance varies widely depending on the
temperature and humidity as well as on the test voltage.
In general, it decreases as the temperature, humidity or
voltage increases.
7. The tester may generate a sound during voltage generation,
particularly when the resistance is low. This is not malfunction.
Nominal test
voltage
Measurement
range
Accuracy Note
250 V 0.0-104.9 MΩ
±(5%rdg + 3 dgt)
OL at 105.0 MΩ
or more
500 V
0.0-99.9 MΩ
80-1049 MΩ
OL at 1050 MΩ
or more
1000 V
0.0-99.9 MΩ
80-999 MΩ
0.80-2.09 GΩ
OL at 2.10 GΩ
or more
2500 V
0.0-99.9 MΩ
80-999 MΩ
0.80-9.99 GΩ
8.0-104.9 GΩ
OL at 105.0 GMΩ
or more
5000 V
0.0-99.9 MΩ
80-999 MΩ
0.80-9.99 GΩ
8.0-99.9 GΩ
OL at 1200 GΩ
or more
80-1000 GΩ ±20%rdg
1001-1199 GΩ -