FCI ST75 Installation And Operation Manual - page 10
Fluid Components International LLC
ST75/ST75V Mass Flow Meter
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10
06EN003368 Rev. G
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 composed of 316 SS and Hastelloy C.
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.
Calibration
Periodically verify the calibration of the output and recalibrate if necessary. FCI recommends every 18 months at a minimum.
Electrical Connections
Periodically inspect cable connections on terminal strips and terminal blocks. Verify that terminal connections are tight and physically
sound with no sign of corrosion.
Remote Enclosure
Verify that the moisture barriers and seals protecting the electronics in the local enclosure is adequate and that no moisture is entering
the enclosure.
Electrical Wiring
FCI recommends occasional inspection of the system’s interconnecting cable, power wiring and flow element wiring on a “common
sense” basis related to the application environment. Periodically inspect the conductors for corrosion and check 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 environmental seals used.
Maintenance
The last saved mode of the next menu item displays:
“Sample Period”
...followed by the prompt:
“Change? (Y/N)>”
Respond with “Y” to enter a sample period value
from 0.5 to 5 seconds.
If no change, select N and/or [ENTER] to continue.
The last saved mode of the next menu item displays:
“Source state:”
“High to Low”
...followed by the prompt:
Change to “Low to High?>”
Respond with “Y” to toggle to the alternate setting.
If no change, select N and/or [ENTER] to continue.
The last saved mode of the next menu item displays:
“Switchpt1”
“0.0000000”
...followed by the prompt:
“Change? (Y/N)>”
Respond with “Y” to enter a setpoint value (value
is in same units as the flow and must be within the
calibrated range).
If no change, select N and/or [ENTER] to continue.
The last saved mode of the next menu item displays:
“Sink state: ”
“High to Low”
...followed by the prompt:
Change to “Low to High?>”.
Respond with “Y” to toggle to the alternate setting.
If no change, select N and/or [ENTER] to continue to normal operation (programming finished).