FCI ST100 series, Руководство по установке, эксплуатации и обслуживанию

Страница: 39 / 106

ST100 Series Flow Meter MAINTENANCE
Fluid Components International LLC 33
4 MAINTENANCE
Warning:
To avoid hazards to personnel, ensure that all environmental isolation seals are properly maintained.
Caution: The electronics contains electrostatic discharge (ESD) sensitive devices. Use standard ESD precautions when handling the
electronics. Refer to "ESD Precautions" on page 13.
The FCI instrument requires little maintenance. There are no moving parts or mechanical parts subject to wear in the instrument. The sensor
assembly which is exposed to the process media is all stainless steel construction.
Without detailed knowledge of the environmental parameters of the application surroundings and process media, FCI cannot make specific recom-
mendations for the periodic inspection, cleaning, or testing procedures. However, some suggested general guidelines for maintenance steps are
offered below. Use operation experience to establish the frequency of each type of maintenance.
Calibration
Periodically verify the calibration of the output and recalibrate if necessary. See Chapter 4: Troubleshooting. FCI recommends every 18 months at a
minimum.
Electrical Connections
Periodically inspect cable connection on terminal strips and terminal blocks. Verify that terminal connections are tight and physically sound with no
signs of corrosion
Remote Enclosure
Verify that the moisture barriers and seal protection of the electronics, in the local and remote enclosures, are adequate and that no moisture is
entering those enclosures.
Electrical Wiring
FCI recommends occasional inspection of the system’s interconnecting cable, power wiring and flow element wiring on a “common sense” basis as
appropriate to the application environment. Periodically inspect the conductors for corrosion and the cable insulation for signs of deterioration.
Flow Element Connections
Verify that all seals are performing properly and that there is no leakage of the process media. Check for deterioration of the gaskets and environ-
mental seals used.
Flow Element Assembly
Periodically remove the flow element for inspection based on historical evidence of debris, foreign matter, or scale build-up and appropriate plant
shutdown schedules and procedures. Check for corrosion, stress cracking, and/or build-up of oxides, salts, or foreign substances. The thermowells
must be free of excessive contaminants and be physically intact. Any debris or residue build-up could cause inaccurate flow measurement. Clean the
flow element, as necessary, with a soft brush and available solvents (compatible with stainless steel).