27
10.8.
Insulation Check
10.8.1.
When a insulation resistance tester is available at hand
You may receive electric shock if you touch the sensor head or
anode during insulation check.
Do not touch the sensor head.
Connect a insulation resistance tester to the anode pin and sensor head body and
make insulation check. If the insulation resistance is 10,000 M (10G)
Ω
or more, there is
no problem. If it is less than 10,000 M (10 G)
Ω
, reassemble the sensor head as described
in 5.
Fig. 10-20 Insulation check
10.8.2.
If a insulation resistance tester is not available at Hand
Do not touch the sensor head during insulation check. If the anode
and sensor head are shorted, the sensor head is energized with a
high voltage of 2.6 kV DC.
Do not touch the sensor head.
When turning on the high voltage to this instrument under
atmospheric pressure, do not make check in combustible gas
atmosphere. If a high voltage of about 2.6 kV DC. is applied, spark
will be emitted and may cause fire.
Do not check insulation in a combustible gas atmosphere.
If a insulation resistance tester is not available at hand,
①
check the anode and
magnetic pole for contact and
②
connect the sensor unit for check.
①
To check the anode and magnetic pole for contact, make sure that the anode and
sensor head body are not in continuity using a insulation resistance tester like
digital multi-meter.
②
To check contact with the sensor unit connected, input a driving power of 24 V DC.
and HV ON signal to SC1 and make sure that the output voltage is 10 V DC or
more. If it is not higher than 9.6 V DC, it is likely that the insulation resistance of
the anode has dropped. In this case, replace the anode with a new one. (Refer to
Table 6.1 SC1 Pin Assignment).
Insulation
Tester
Summary of Contents for G-Tran BMR2
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