Maintenance, Cleaning - WIKA FSM-BSV Operating Instructions Manual

6. Faults / 7. Maintenance, cleaning
Faults
Contact chatter (repeated,
short-duration opening and
EN
closing)
Switching status remains
unchanged despite reaching
the switch point/reset point

7. Maintenance, cleaning

Personnel: Skilled personnel
Tools: cross-head/star screwdriver, open-ended spanner
For contact details, see chapter 1 "General information" or the back page of the operating instructions.
7.1 Maintenance
The instrument model FSM-BSV is low-maintenance. The switch point setting must be checked after 3 months. Carry
out switch point setting with matching test setup, see chapter 5.5 "Switch point setting".
Repairs must only be carried out by the manufacturer.
16
Causes
Turbulent flow oscillations
Error with switch point setting
Contacts defective (e.g. fused
contact zone)
Flow port blocked.
Leakage
Measures
Maintain a laminar flow with control valves, decouple the
flow switch mechanically
Carry out switch point setting with matching test setup, see
chapter 5.5 "Switch point setting"
Replace instrument. Before recommissioning the new
instrument, provide a protective circuit for the contact
Disassemble, clean and reinstall the instrument
Carry out a leak test. Seal the process connection or replace
the instrument.
WIKA operating instructions, model FSM-BVS