Instruction manual
OCM Pro CF
®
OCM Pro CF - Rev. 09 as of 07.06.2016
page 91
Sensor combination examples:
On the following pages you can find the combinations possible between the dif-
ferent sensor types.
Such combinations are required as soon as one single level sensor is not suffi-
cient for level detection covering the desired measurement range due to con-
structional reasons (see also Fig. 7-47)
Air-US NIVUS +
Internal pressure
Combination between sensor types 1 and 5.
This combination is recommended for measurement ranges from 0 cm level up
to flood. In this case the air-ultrasonic sensor type OCL or DSM detects low
levels; the pressure sensor detects the flood range. The pressure sensor may
be installed out of the centre if the risk of sedimentation or soiling should occur
(Fig. 7-39).
1 Sedimentation, soiling
Fig. 9-39
Combination: Air-ultrasound and internal pressure
2-Wire probe (Ex) +
internal pressure
Combination between sensor types 3 or 6 and sensor type 5.
Same area of use as described under version >air-US + internal pressure<.
However the air-ultrasonic sensor type OCL/DSM will be replaced by a 2-wire
probe.
Internal Water-US +
Internal pressure
Combination from sensor types 2 and 5.
This combination is recommended for level measurement ranges as from
approx. 0.5 cm up to flood. The pressure sensor is responsible for upper and
lower measurement range. The water-ultrasonic sensor detects the medium
part filled area.
The water-ultrasonic sensor must be installed in the centre of the channel
bottom. Otherwise there is the risk of echo loss and hence measurement failure.
P
1
