WIKA FSD-4, Operating Instructions Manual

Page: 22 / 140

14399527.01 05/2021 EN/DE/FR/ES
22 WIKA operating instructions flow switch, model FSD-4
EN
5.8 Dampening function
The time constant “x” specifies the time duration which the digital display, the
switching output or the analogue signal requires to approach the end value with
a deviation of ± 1 % following a change in measured value. After a duration of
2 times “x”, the output value has reached 100 % with a deviation of ± 0.01 % of the
prevailing flow.
5.9 Measuring range scaling (turndown)
For versions with analogue signals, start of measuring range and end of measuring range can be set within the
permissible measuring range (turndown of 5:1 not exceeded).
5.10 Description of the IO-Link functionality (optional)
IO-Link is a point-to-point connection for the communication of the flow switch with an IO-Link master.
IO-Link specification: Version 1.1
A detailed description of the IO-Link functionality and the device description file (IODD) can be found online on the
product details page of the flow switch at www.wika.com or at https://io-link.com/en/.
6. Faults
CAUTION!
Physical injuries and damage to property and the environment
If faults cannot be eliminated by means of the measures listed, the flow switch must be removed from
the voltage supply immediately.
▶
Ensure that pressure or signal is no longer present and protect against accidental commissioning.
If measuring range scaling is set, despite an analogue value of 4 mA or 0 V, pressure can still be
present.
▶
Contact the manufacturer.
▶
If a return is needed, please follow the instructions given in chapter 8.2 “Return”.
100 %
0
x
Zeit
Time
5. Commissioning, operation / 6. Faults