WIKA FSD-4, Operating Instructions Manual

Page: 13 / 140

14399527.01 05/2021 EN/DE/FR/ES
13 WIKA operating instructions flow switch, model FSD-4
EN
5.1.5 Disturbing interferences in the piping system
For correct measurement, the flow switch requires a fully
developed flow profile. This is why calming sections must
be provided in the pipeline after a pump, a pipe elbow,
installed parts and changes in cross-section.
5.1.6 Mounting the instrument
The max. torque depends on the mounting
point (e.g. material and shape). If you
have any questions, please contact our
application consultant.
For contact details see chapter 1 “General
information” or the back page of the
operating instructions.
If a process connection adapter (optional) is used, first
screw it into the mounting point by hand and then tighten
it using a torque spanner. Use enclosed sealing.
1. Depressurise the system and switch off the flow.
2
.
Sealing the process connection (→ see chapter 5.1.4 “Sealing”).
3. At the mounting point, screw the flow switch in hand-tight.
4. Tighten with a torque spanner using the spanner flats.
5.2 Electrical mounting
Requirements for voltage supply
Supply voltage: DC 15 ... 35 V
This equipment is intended for operation with low voltages which are separated from the AC 230 V (50 Hz) mains voltage
or voltages greater than AC 50 V or DC 120 V for dry environments. A connection to an SELV circuit is recommended, or
alternatively to circuits with a different protective measure in accordance with IEC 60364-4-41 installation standard.
L > 3 ... 5 x D
L > 3 ... 5 x D
5. Commissioning, operation