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4.2.2
S
PECIFIC INSTALLATION INSTRUCTIONS
:
INSTRUMENT
-
SOLID APPLICATIONS
F
ALSE READINGS
:
1 Do not let the probe touch the side of the nozzle
Conical silo nozzles, false readings and traction on the cable probes
2 High traction forces:
We recommend that the probe should not be anchored to avoid excessive traction loads on the
cable.
3 Bending and traction:
Position the connection on the roof at ½ radius of the tank and with minimum nozzle height.
This will avoid damage due to bending and traction during emptying.
Traction load is dependent upon the height and shape of the tank, product particle size & density, and the rate at which the tank is emptied. The table below
gives the load up to which cable probes will hold.
Probe type
Material
Probe Length 6 m
Probe Length 12 m
Probe Length 24 m
Mono cable Ø8 mm, max. load: 3.0 T
Cement
0.6 T
1.2 T
2.4 T
Fly ash
0.3 T
0.6 T
1.2 T
Product build-up can occur under the nozzle: this may weaken the pulse.
Avoid cavities that permit the build-up of deposits.
Tank roofs should support loads of at least 3 T for instrument installations using Ø8 mm or 0.3” single cable probes.
