WIKA FSD-3 - Page 20

20 WIKA operating instructions flow switch, model FSD-3
EN
14153887.01 09/2016 EN/DE/FR
5. Commissioning, operation
5.6 Adjustment
1. Depressurise the system and switch o the ow.
2
.
Mount the ow switch and connect it electrically.
(→ refer to chapter 5.1 “Mechanical mounting” and 5.2 “Electrical mounting”)
3. Recall menu item “SETF” ▶ “MIN” and conrm “0”.
4. Set the maximum ow in the system.
Observe measuring ranges (→ see chapter 9 “Specications”).
5. Recall menu item “SETF” ▶ “MAX” and conrm “100”.
5.7 Switching functions
Hysteresis function
If the ow rate uctuates around the set point, the hysteresis keeps the
switching status of the outputs stable. With increasing ow rate, the output
switches when reaching the switch point (SP).
■
Contact normally open (HNO): Active
■
Contact normally closed (HNC): Inactive
With the ow rate falling again, the output will not switch back before the
reset point (RP) is reached.
■
Contact normally open (HNO): Inactive
■
Contact normally closed (HNC): Active
Fig.: Hysteresis function