Adjusting The Switching Unit (Optional) - SIKA VH Série Notice D'utilisation

VH / VK
4

Adjusting the switching unit (optional)

Standard contact
The flow switch can be operated as normally open contact or as normally closed contact. The
following table explains the two types of contact:
Contact
Normally open contact
(open without flow)
Normally closed
contact
(closed without flow)
If not otherwise agreed with the customer, the switching unit is factory set as a normally
•
open contact.
If there are no arrows on your switching unit, the contact type cannot be altered.
•
Changeover contact (only VH3)
For flow switches with a change-over contact a fine adjustment can only be carried out within
the red arrow. The contact switches after reaching the set setpoint.
Setpoint range
Adjustment of the switching unit is not required if a desired ex works setpoint setting has
•
been agreed with the customer.
• Fine adjustment is not possible with the types VHS06, VHS09, VKS06, VK306 and
VK309. You can only change the contact type by adjusting the switching unit.
Only if a setpoint range is specified on the type plate, the setpoint can be adjusted.
•
Flow switch of type VH...X
The flow switch type VH...X is supplied ex works with normally open contact and a fixed set-
point. Adjustment of the type of contact and the setpoint for flow switch version VH...X is not
permitted.
Opening the switch head (only VHS, VKS)
 Open the lid of the plug connector.
Technical changes reserved
Setting
Red arrow
White or
blue arrow
Adjusting the switching unit (optional)
Flow
Increasing
Decreasing
Increasing
Decreasing
Electric contact
Closed
Open
Open
Closed
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