Prosonic S FDU90/91/91F/92/93/95/96
Hauser
11
Installation conditions for
level measurements
L00-FDU9xxxx-17-00-00-xx-003
• If possible, install the sensor so that its lower edge projects into the vessel.
• Make sure, that the maximum level does not reach into the blocking distance (BD, see table).
• Do not install the sensor in the middle of the tank (2). We recommend leaving a distance (1) between the
sensor and the tank wall measuring 1/6 of the tank diameter.
• Avoid measurements through the filling curtain (3).
• Make sure that equipment (4) such as limit switches, temperature sensors, baffles etc. are not located within
the emitting angle
. Emitting angles of the individual sensors are given in the table below. In particular,
symmetrical equipment (5) such as heating coils etc. can influence the measurement.
• Align the sensor vertically to the product surface (6). An alignment unit (FAU40) is available as an accessory
• If the two-channel version of the transmitter FMU90 or the multi-channel version of the transmitter FMU90
is used, both sensors can be mounted in one vessel.
• To estimate the detection range, use the 3 dB emitting angle
:
Warning!
All national guidelines applicable must be observed in explosion hazardous areas.
1
4
5
1/6D
r
a
L
BD
6
BD
2
3
D
BD
Sensor
(typically)
L (max)
r (max)
FDU90 12°
3
(9.8)
0.31
(1.0)
FDU91 9°
10
(33)
0.79
(2.6)
FDU91F 12°
10
(33)
1.05
(3.4)
FDU92
11°
20 (66)
1.92 (6.3)
FDU93
4°
25 (82)
0.87 (2.9)
FDU95
5°
45 (148)
1.96 (6.4)
FDU96
6°
70 (230)
3.6 (12)
m (ft)
