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Designs, materials, weights and performance ratings are approximate and subject to change without notice. Visit
armstrong
international.com for up-to-date information.
Troubleshooting and Repair – continued
Determine the Fault – continued
Symptom: No Output
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. Turn on the pressure and temperature display in the Display Menu and verify that the pressure and temperature are
correct.
3. Using ESD precautions and hazardous area precautions, remove the electronics enclosure window cover.
Disconnect the vortex sensor from the electronics stack or remote feed through board. Refer to Figure 5-1 or 5-2.
Measure the resistance from each outside pin to the meter ground - each should be open. Measure the resistance
from the center pin to the meter ground – this should be grounded to the meter.
Figure 5-1.Electronics Stack Sensor Connections
Figure 5-2.Remote Feed Through Board Sensor Connections
Figure 5-3.Vortex Sensor Connector
With the sensor still disconnected, go to the first level of the hidden diagnostics and display the vortex shedding
frequency, f. Hold a finger on the three exposed pins on the analog board. The meter should read electrical noise,
60 Hz for example. If all readings are correct, re-install vortex sensor wires.
4. Verify all meter configuration and troubleshooting steps previously described. There are many possible causes of
this problem, consult factory if necessary.
