VEGA VEGAFLEX 86 4 … 20 mA_HART two-wire Rod and cable probe With SIL qualification - Manual (Page 85)

85
12 Supplement
VEGAFLEX 86 • 4 … 20 mA/HART two-wire
44234-EN-130823
Ʋ Displayed value 2 Electronics temperature
Resolution, digital < 1 mm (0.039 in)
Accuracy (according to DIN EN 60770-1)
Process reference conditions according to DIN EN 61298-1
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) 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
L
0
-2 mm (-0.079")
2 mm (0.079")
15 mm (0.591")
-5 mm (-0.197")
0,3 m
(11.811")
0,08 m
(3.15")
1
0,015 m
(0.591")
Fig. 48: Deviation VEGAFLEX 86 in rod version in water
1 Dead band - no measurement possible in this area
L 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.