Operating Instructions
OIO 15en Edition 2020-05
17
Signal generation
Function description
Signal generation
A pick up samples the measuring pulses directly on the screw. The pick up generates a specific number
of pulses per flow volume unit - depending on the size and working point. This device-specific
characteristic is called the K-factor (unit: Pulse/Liter) and can be found on the rating plate and the
enclosed calibration certificate. Possible formats of the signals are:
□
PNP
□
NAMUR
As a consequence of the mode of assembly the pick up can be mounted without contact to the fluid to
be measured. Two different pick ups are employed, depending on the application (standard, or for use in
areas where there is an explosion hazard):
□
Pick up based on the Hall effect
□
Inductive pick up
Housing variants
A variety of housing variants is available, depending on the application:
Tab. 1 Housing variants
Application
Housing variant
Sensors
Standard
Signal: PNP
□
1 pick up
or
□
2 pick ups
□
1 pick up
□
1 temperature sensor
or
□
2 pick ups
□
1 temperature sensor
Use in areas where there
is an explosion hazard
Signal: Namur
□
1 pick up
□
2 pick ups
□
1 pick up
□
1 temperature sensor
□
2 pick ups
□
1 temperature sensor
