KROHNE CORIMASS G-MFM 4085 EN - Manual (Page 92)

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8.8.2 Remote Meter
The G meter can be supplied as remote meter with 5 m cable. Under no circumstances should
the cable cut be shorter or joined to increase its length. The meter is calibrated with this 5m
cable length. Any changes will influence the performance of the meter.
There are two different configurations of remote meter, on the first version the cable is cast on
the converter end and the second has a terminal junction box at the converter end. On the
junction box version, the measurements can be done at the terminals. On the cast version,
measurements can be done on the blue primary connector (see section 8.8.1).
Testing the resistance values of
the sensors and exciter Typical values Assesment of
measured values
1 Measuring tube driver:
Measure between white and
black
30 - 50 ohm
2 To check sensor A and B:
Measure between:
green and black
(Sensor A)
orange and black
(Sensor B)
50 - 130 ohm
Measurements outside
typical values:
Primary faulty
Replace or call Krohne
service.
3 To check the temperature
sensor (RTD):
Measure between blue and
black
500 - 550 ohm
(ambient temperature
dependant)
Measurements inside
typical values:
Sensor OK
4 To check the strain gauge:
Measure between black and
red.
400 - 600 ohm