Emerson Micro Motion 3711 Configuration And Use Manual page 195

Maintenance and Troubleshooting
With the DMM set to its highest range, there should be infinite resistance on each lead. If there
is any resistance at all, there is a short to case. See Table 15-9 for possible causes and
solutions.
6. Test pin pairs as follows:
a. Drive + against all other pins except Drive –
b. Drive – against all other pins except Drive +
c. Left pickoff + against all other pins except Left pickoff –
d. Left pickoff – against all other pins except Left pickoff +
e. Right pickoff + against all other pins except Right pickoff –
f. Right pickoff – against all other pins except Right pickoff +
g. RTD + against all other pins except LLC + and RTD/LLC
h. LLC + against all other pins except RTD + and RTD/LLC
i. RTD/LLC against all other pins except LLC + and RTD +
Note: D600 sensors and CMF400 sensors with booster amplifiers have different terminal pairs.
Contact Micro Motion for assistance (see Section 1.8).
There should be infinite resistance for each pair. If there is any resistance at all, there is a short
between pins. See Table 15-9 for possible causes and solutions.
7. If the problem is not resolved, contact Micro Motion (see Section 1.8).
To return to normal operation:
1. Align the three guide pins on the bottom of the core processor with the corresponding holes in
the base of the core processor housing.
2. Carefully mount the core processor on the pins, taking care not to bend any pins.
3. Tighten the captive screw to 6 to 8 in-lbs (0,7 to 0,9 N-m) of torque.
4. Replace the core processor lid.
Note: When reassembling the meter components, be sure to grease all O-rings.
Configuration and Use Manual 187