KROHNE OPTISOUND 3040 C 4wire EN - Manual (Page 12)

1 3 2
100%
0%
4
Fig. 4: Version B, C, D – Measuring range (operating range) and max. measuring
distance
1 full (dead zone)
2 empty (max. measuring distance)
3 Measuring range
4 Reference plane
Gauge pressure in the vessel does not influence OPTISOUND
3040 C. Low pressure or vacuum, however, damp the
ultrasonic pulses. This influences the measuring result,
particularly if the level is very low. With pressures under -
0.2 bar (-20 kPa) you should use a different measuring
principle, e.g. radar or guided radar (TDR).
4.2 Mounting preparations
Version B is supplied in two parts:
l
Transducer
l
electronics housing
Assemble the version as follows:
1 Loosen the screws on the fixing ring (4) with a hexagon
spanner (size 4), remove the transducer tube out of the
swivelling holder
2 Mount the flange
3 Insert the transducer tube in the requested length from
below into the swivelling holder
4 Fasten with screws (4); torque max. 10 Nm
Pressure/Vacuum
Assembly – version B
12 OPTISOUND 3040 C - 4 ... 20 mA/HART - four-wire
Mounting
30515
-EN
-050914