Fuji Electric FCX-AII-V5 series Instructions Manual And Service Instructions page 105

Maintenance
Check of arrester :
Measure output current from the transmitter on the current loop 4/20mA and CK+/- of the
transmitter.
If the measured two output current are the same, the arrester is normal.
In case the measured values have a difference of 0.1% (0.016mA) or more, the arrester
is not functioning. In the above case, the arrester unit (terminal unit) should be replaced
with a new one.
Limitation of insulation resistance and dielectric strength test
An insulation resistance and dielectric strength test should be avoided as a rule, since it
may damage the arrester.
Output measurement at check terminals (CK+ and CK-)
Output measurement on the current loop (4/20 mA)
* Disconnect the wire from the "-" terminal and connect the measurement device a shown
below.
DC power
supply
TN5FCXA2V5h-E
To (–)
terminal
To (+)
terminal
Standard resistor
(1 or 10 )
To (+) terminal
To (+) side wiring
To (–) side wiring
Digital voltmeter
To (–) terminal
Digital voltmeter
Standard resistance
(1 or 10 )
103