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9
Maintenance / Repair
Repair and maintenance activities may only be performed by authorized customer service
personnel.
When replacing or repairing individual components, original spare parts must be used.
Notice - Potential damage to parts!
The electronic components of the printed circuit board can be damaged by static electricity
(observe ESD guidelines). Make sure that the static electricity in your body is discharged
when touching electronic components.
9.1
Flowmeter sensor
Essentially maintenance is not required for the flowmeter sensor. The following items should be
checked annually:
•
Ambient conditions (air circulation, humidity)
•
Seal integrity of the process connections
•
Cable entry points and cover screws,
•
Operational reliability of the auxiliary power feed, the lightning protection and the grounds
The flowmeter sensor electrodes must be cleaned when the flowrate information on the
transmitter changes when recording the identical flowrate volume. If the display shows a higher
flowrate, the contamination is insulating. If the flowrate displayed is lower, the contamination
results in a short-circuit.
For repairs to the lining, electrodes or magnet coil, the flowmeter must be returned to the local
office of ABB.
Important
When sending the flowmeter sensor to the local office of ABB, complete the return form in the
appendix and include with device.
When cleaning the exterior of meters, make sure that the cleaning agent used does not corrode
the housing surface and the gaskets.
9.2
Gaskets
Some device designs are shipped with special gaskets. These gaskets must be used and
installed properly to prevent leakage.
For all other device designs, use commercially available gaskets made from a compatible
material for the fluid and prevailing temperature (rubber, PDFE, lt, EPDM, silicon, Viton, etc.).
Important
A flowmeter sensor in wafer configurations is installed without gaskets directly in the pipeline.
D184B140U02
FSM4000
Maintenance / Repair
105
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