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- Series VMZ
Commissioning and measuring operation
Technical changes reserved
- 11 -
6
Commissioning and measuring operation
Before switching on the VMZ for the first time, please follow the instructions in the following
section.
6.1
Commissioning
Check that
the VMZ 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.
6.2
Switching on and off
The VMZ 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 red LED lights up permanently. The VMZ is ready for use and
goes into measuring operation.
6.3
Measuring operation
In the measuring mode, the red LED is permanently lit and indi-
cates that the VMZ is operational.
The green LED flashes proportional to the measured flow.
The human eye cannot detect the flashing any longer from a frequency of ~30 …
40
Hz.
In that case the green LED seems to be lit permanently.
Frequency output:
The frequency output provides a flow-
proportional PNP/NPN square wave signal.
The frequency changes according to the flow
(
Fig.).