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Commissioning notes
Contact type factory
setting
NO or NC contact
Setting the
switching unit
NO contact (red arrow)
Operating notes
Service notes
4 / 6
Siemens
Hindustan Hydraulics & Pneumatics, Chennai - 01.
Building Technologies
Contact person : V. Anandha krishnan - 98409 21885
The switching unit is factory set as a make contact, i.e. the reed contact opens if
the set switching point is breached.
Type of contact
NO
(closer)
NC
(opener)
The setting can be changed as needed by the customer:
Loosen the locking screw (Phillips-head screw) and position the switching unit
until the red or white arrow are visible at the entry of the switching contact guide
for a desired normally open (NO) or normally closed (NC) contact respectively.
You can use the arrow length to make fine adjustments to the switching point:
Adjust to the arrowhead means: Switching point is at a lower flow rate.
Adjust to the arrow end: Switching point is at a higher flow rate.
Carefully retighten the locking screw.
We recommend using thread locker to secure the locking screw on the switching
unit after carrying out individual adjustments.
Please make sure that there are no external magnetic fields in the immediate
vicinity of the flow switch, since these can impair device operation.
Ensure that the maximum operating pressure is not exceeded.
Never remove a flow switch or its body from a system under pressure.
The flow switch is maintenance-free and cannot be repaired by the user.
Flow switch QVE1902.0..
Setting
Flow rate
increasing
RED arrow
decreasing
increasing
WHITE arrow
decreasing
NC (white arrow)
Phone : 2534 3066, 2534 5625, 2534 5587
E-Mail : hhp@hindustanhydraulic.in
Electric contact
closing
opening
opening
closing
CM1N1596en
2017-02-16
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