Commissioning And Operating; Commissioning; Switching On And Off; Measuring Operation - SIKA VVX Série Notice D'utilisation

Commissioning and operating

VVX
5 Commissioning and operating
Before switching on the VVX for the first time, please follow the instructions in the following
section.

5.1 Commissioning

Please check before initial start-up whether
 the VVX has been installed correctly and that all screw connections are sealed.
 the electrical wiring has been connected properly.
 the measuring system is vented by flushing.

5.2 Switching on and off

The VVX has no switch and cannot be switched on or off on its own. Switching on and off is
carried out by the applied supply voltage.
 Switch on the supply voltage.
 The VVX is ready for use and goes into measuring operation.

5.3 Measuring operation

The following sections apply only to devices equipped with the corresponding functions.

5.3.1 Flow measurement

VVX with frequency output:
Depending upon the product version, the VVX
generates an NPN, PNP or push-pull square
wave signal proportional to the flow.
The frequency corresponds to the flow
( Fig.).
VVX with analogue, voltage or current out-
put (optional):
The output of the VVX is either the voltage U or the current I .
Flow Flow
The output signal is proportional to the measured flow. The scaling of the output can be
found on the type plate and on p. 33.

5.3.2 Temperature measurement (optional)

The temperature is measured by an additional sensor R integrated into the measuring
Temp
tube.
This is a version dependent NTC thermistor or Pt1000 sensor.
If the VVX has an analogue output (0.5...3.5 V)), U may optionally be accessed in place
Temp
of the flow signal. The scaling of the output can be found on the type plate and on p. 33.
- 30 - © SIKA • Ba_VVX • 09/2021