ONICON F-2600 - Manual (Page 107)

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F-2600 & F-2700 Vortex Flow Meter Manual 02/15 - 0808-7 / 19204 Page 107
5.6.3 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 54 or 55. 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 56. Vortex Sensor Connector
With the sensor still disconnected, go to the first column 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 the factory if necessary.
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