Panametrics PanaFlow MV80, User Manual, Page: 151 / 184

PanaFlow™ MV80, MV82 & MV84 User’s Manual 139
Chapter 5. Troubleshooting and Repair
5.5.4 Symptom: Meter Displays Temperature Fault
1. For remote mounted electronics, carefully check all the wiring connections in the remote mount junction box.
There are 18 connections that must be correct. Verify each color (black and red), shield, and wire number.
2. Go to the first column of the hidden diagnostics and check the resistance of the RTD1. It should be about 1080
ohms at room temperature.
3. Using ESD precautions and hazardous area precautions, remove the electronics enclosure window cover.
Disconnect the temperature sensor from the electronics stack (see
Figure 121 on page 137 ) or the remote feed
through board (see Figure 122 on page 137 ). Measure the resistance across the outside pins of the temperature
sensor connector (see Figure 124 below). It should read approximately 1080 ohms at room temperature (higher
resistance at higher temperatures). Measure the resistance across the inside pins, they should read the same.
4. Measure the resistance from one of the outside pins to case ground then from one of the inside pins to case
ground. They should read open.
OUTSIDE
OUTSIDE
INSIDE
Figure 124: Temperature Sensor Connector Pins
5. Consult Panametrics with your findings