VEGA VEGAFLEX 83 4 … 20 mA_HART two-wire PFA insulated - Manual (Page 79)

79
11 Supplement
VEGAFLEX 83 • 4 … 20 mA/HART two-wire
41834-EN-130612
Ʋ Medium Water/Oil (dielectric constant ~2.0) 4)
Ʋ Installation Probe end does not touch the vessel bottom
Sensor parameter adjustment No gating out of false signals carried out
Typical deviation - Interface measure-
ment
± 5 mm (0.197 in)
Typical deviation - Total level interface
measurement
See following diagrams
Typical deviation - Level measurement 5)6) See following diagrams
0,2 m
(7.874 " )
0,1 m
(3.937 " )
0,04 m
(1.575 ")
1
L
0
-2 mm
(-0.079 ")
2 mm
(0.079 ")
15 mm
(0.591 " )
-15 mm
(-0.591 ")
Fig. 44: Deviation VEGAFLEX 83 in rod version (coated) in water
1 Dead band - no measurement possible in this area
L Probe length
Deviation - level measurement from 6 m
probe length
0.5 % of the probe length
4) With interface measurement = 2.0
5) Depending on the installation conditions, there can be deviations which can be rectified with an adaptation of
the adjustment or a change of the measured value offset in the DTM service mode
6) The dead bands can be optimizes by a false signal suppression.