Siemens SITRANS LG250 Operating Instructions Manual page 65

Ʋ Relative humidity
Ʋ Air pressure
Installation reference conditions
Ʋ Min. distance to installations
Ʋ Vessel
Ʋ Medium
Ʋ Installation
Sensor parameter adjustment
Typical deviation - Interface measure-
ment
Typical deviation - Total level interface
measurement
Typical deviation - Level measurement
Max. deviation - Version with reference
distance
Deviating upper dead band - Version with
reference distance
5 mm (0.197
")
2 mm (0.079
")
0
-2 mm (-0.079 ")
1
-10 mm (0.394 ")
0,03 m (1.181
Fig. 32: Deviation SITRANS LG250 in coax version in water
1 Dead band - no measurement possible in this area
L Probe length
With interface measurement = 2.0
2)
Depending on the installation conditions, there can be deviations which can be rectified with an adaptation of
3)
the adjustment or a change of the measured value offset in the DTM service mode
The dead bands can be optimizes by a false signal suppression.
4)
PBD-51041056
45 ... 75 %
+860 ... +1060 mbar/+86 ... +106 kPa
(+12.5 ... +15.4 psig)
> 500 mm (19.69 in)
metallic, ø 1 m (3.281 ft), centric installation, process
fitting flush with the vessel ceiling
Water/Oil (dielectric constant ~2.0)
Probe end does not touch the vessel bottom
No gating out of false signals carried out
± 5 mm (0.197 in)
± 5 mm (0.197 in)
See following diagrams
3)4)
± 10 mm (0.39 in)
450 mm (17.7 in)
" )
0,15 m (5.906 )
"
SITRANS LG250 - Operating Instructions
L
2)
0,05 m
(1.969
")
65