Designs, materials, weights and performance ratings are approximate and subject to change without notice. Visit
armstrong
international.com for up-to-date information.
113
Troubleshooting and Repair – continued
Determine the Fault – continued
Symptom: Meter Displays Temperature Fault
1. For remote mounted electronics, carefully check all the wiring connections in the remote mount junction box.
There are 15 connections that must be correct, verify each color (black and red), shield, and wire number.
2. Go to the first level 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 or the remote feed through board. Refer to Figure
5-1 or 5-2. Measure the resistance across the outside pins of the temperature sensor connector. It should read
approximately 1080 ohms at room temperature (higher resistance at higher temperatures).
4. Consult factory with findings.
Symptom: Meter Displays Pressure Fault
1. For remote mounted electronics, carefully check all the wiring connections in the remote mount junction box.
There are 15 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 or the remote feed through board. Measure the
resistance across the outside pins of the pressure sensor connector, then across the inside pins. Both readings
should be approximately 4000 ohms.
3. Go to the first level of the hidden diagnostics and record the Pe(V) and Pv(V) values and consult the factory with
findings.
Figure 5-4.Temperature Sensor Connector
Figure 5-5.Pressure Sensor Connector