Pepperl+Fuchs NVD-111 Anleitungen Seite 17

WARNING DEVICE NVD-111
Installation
If a non-electrically conductive fat layer settles on the surface, there is a risk that a
possible overflow will not be detected by the sensor. Therefore we recommend
mounting a pitot tube for overflow sensor KVF-O. This ensures that the sensor
only comes into contact with water and the overflow is detected. The following
diagram shows the composition.
Figure 3.3
1 Overflow sensor KVF-O
A Air
B Fat, oil, grease (FOG)
C Water
D Open pitot tube (not supplied)
L Water zero line
S Sensor switching point
X Alarm limit (maximum liquid level)
1
A
B
C
D
Mounting the overflow sensor KVF-O with pitot tube
S
L
EN
EN - 15