VEGA VEGAFLEX 83 4 … 20 mA_HART two-wire Polished version - Manual (Page 80)

80
11 Supplement
VEGAFLEX 83 • 4 … 20 mA/HART two-wire
41839-EN-130612
Ʋ Temperature +18 … +30 °C (+64 … +86 °F)
Ʋ Relative humidity 45 … 75 %
Ʋ Air pressure +860 … +1060 mbar/+86 … +106 kPa
(+12.5 … +15.4 psig)
Installation reference conditions
Ʋ Min. distance to installations > 500 mm (19.69 in)
Ʋ Vessel metallic, ø 1 m (3.281 ft), centric installation, process
fitting flush with the vessel ceiling
Ʋ Medium Water/Oil (dielectric constant ~2.0) 5)
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 6)7) See following diagrams
L
0
-2 mm
(-0.079 ")
2 mm
(0.079 ")
15 mm
(0.591 " )
-15 mm
(-0.591 ")
0,2 m
(7.874 " )
0,08 m
(3.15 " )
0,04 m
(1.575 ")
1
Fig. 47: Deviation VEGAFLEX 83 in rod version in water
1 Dead band - no measurement possible in this area
L Probe length
5) With interface measurement = 2.0
6) 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
7) The dead bands can be optimizes by a false signal suppression.