Fluid Components International FR73B Complete Manual - Manual (Page 6)

FLUID COMPONENTS INTERNATIONAL LLC FR78B Flow Switch/Monitor
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Maintenance
The instrument requires very little maintenance. There are no moving parts or mechanical parts subject to wear.
Warning: To avoid hazards to personnel, ensure that any environmental isolation seals are properly maintained.
Without detailed knowledge of the environmental parameters of the application, surroundings, and process media, FCI cannot make
specific recommendations for periodic inspection, cleaning, or testing procedures. However, some suggested general guidelines for
maintenance steps are offered below. Use operating experience to establish the frequency of each type of maintenance.
Alarm Set Point Verification
Periodically verify the alarm set point.
Enclosure (If Present)
Periodically verify that the moisture barriers and seals of the remote enclosures are adequate and that no moisture is entering the
enclosure.
Electrical Wiring
Periodically inspect the power, flow element, and output wiring for signs of corrosion or deterioration.
Electrical Connections
Periodically inspect wire connections on the socket. Verify that terminal connections are tight and physically sound with no sign of
corrosion.
Process Connection
Periodically verify that all seals are performing properly and that there is no leakage of the process media. Check for deterioration of
the gaskets and environmental seals used.
Troubleshooting
Warning: Only qualified personnel should attempt to test this instrument. The operator assumes all responsibilities for
safe practices while troubleshooting.
Tools Needed
Digital Multimeter (DMM)
Quick Check
• Check the jumper positions of J12 and J13. If present, check the jumper positions of J16 and J17. Jumper J12 and J17 energize
the relay(s) at flow or wet. Jumpers J13 and J16 energize the relay(s) at no flow.
• Check that the control circuit is firmly seated into it’s socket.
• Check if power is present and customer fuses are good, if they are used.
• Follow the trouble shooting flow chart in Figure 4 near the end of this section.