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Configuration and Use Manual 111
Troubleshooting
Troubleshooting DisplayDiagramsOperation
8. Test the terminal pairs as follows:
• Brown against all other terminals except Red
• Red against all other terminals except Brown
• Green against all other terminals except White
• White against all other terminals except Green
• Blue against all other terminals except Gray
• Gray against all other terminals except Blue
• Orange against all other terminals except Yellow and Violet
• Yellow against all other terminals except Orange and Violet
• Violet against all other terminals except Yellow and Orange
Note: D600 sensors and CMF400 sensors with booster amplifiers have different terminal pairs.
Contact Micro Motion Customer Service for assistance.
There should be infinite resistance for each pair. If there is any resistance at all, there is a short
between terminals.
9. See Table 6-13 for possible causes and solutions.
10. If the problem is not resolved, contact Micro Motion Customer Service.
Note: When reassembling the meter components, be sure to grease all O-rings.
6.14.2 4-wire remote or integral installation
If you have a 4-wire remote installation or an integral installation:
1. Power down the transmitter.
2. If the transmitter is in a hazardous environment, wait five minutes.
3. If you have a 4-wire remote installation, remove the core processor lid.
4. If you have an integral installation:
a. Loosen the four cap screws that fasten the transmitter to the base (Figure 6-1).
b. Rotate the transmitter counter-clockwise so that the cap screws are in the unlocked
position.
c. Gently lift the transmitter straight up, disengaging it from the base.
Note: You have the option of disconnecting the 4-wire cable or leaving it connected.
Table 6-13 Sensor and cable short to case possible causes and remedies
Possible cause Solution
Moisture inside the sensor junction box Make sure that the junction box is dry and no corrosion is
present.
Liquid or moisture inside the sensor case Contact Micro Motion Customer Service.
Internally shorted feedthrough (sealed passage for
wiring from sensor to sensor junction box)
Contact Micro Motion Customer Service.
Faulty cable Replace cable.
Improper wire termination Verify wire terminations inside sensor junction box. See the
Micro Motion 9-Wire Flowmeter Cable Preparation and
Installation Guide or the sensor documentation.