Emerson Model 1700 User Manual

Moisture inside the junction box

Ensure that the junction box is dry and no corrosion is
present.

Liquid or moisture inside the sensor
case

Contact Micro Motion.

Internally shorted feedthrough

Contact Micro Motion.

Faulty cable

Replace the cable.

Improper wire termination

Verify wire terminations inside sensor junction box. The
Micro Motion document titled 9-Wire Flowmeter Cable Prep-
aration and Installation Guide may offer some assistance.

10.28.1

Check the sensor coils

Checking the sensor coils can identify electrical shorts.

This procedure applies only to 9-wire remote-mount transmitters and remote transmitters with
remote core processors.

1.

Disconnect power to the transmitter.

2.

Remove the end-cap from the core processor housing.

3.

Unplug the terminal blocks from the terminal board on the core processor.

4.

Using a digital multimeter (DMM), check the pickoff coils by placing the DMM leads
on the unplugged terminal blocks for each terminal pair. See 

the coils. Record the values.

Drive coil

All

Brown to red

Left pickoff coil (LPO)

All

Green to white

Right pickoff coil (RPO)

All

Blue to gray

Resistance temperature detector (RTD) All

Yellow to violet

Lead length compensator (LLC)

All except T-Series and CMF400
(see note)

Yellow to orange

Troubleshooting

210