Panametrics PanaFlow MV80, Руководство пользователя, Страница: 152 / 184

Chapter 5. Troubleshooting and Repair
140 PanaFlow™ MV80, MV82 & MV84 User’s Manual
5.5.5 Symptom: Meter Displays Pressure 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. Using ESD precautions and hazardous area precautions, remove the electronics enclosure window cover.
Disconnect the pressure 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 pressure
sensor connector, then across the inside pins (see Figure 125 below). Both readings should be approximately
4400 ohms.
OUTSIDE
INSIDE
OUTSIDE
INSIDE
Figure 125: Pressure Sensor Connector
3. 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.
4. Go to the first column of the hidden diagnostics and record the Pe(V) and Pv(V) values and consult Panametrics
with your findings.