VEGA VEGAFLEX 86 4 … 20 mA_HART - four-wire Coax probe - Manual (Page 67)

67
11 Supplement
VEGAFLEX 86 • 4 … 20 mA/HART - four-wire
42285-EN-130314
Typical deviation - Level measurement 4)5) See following diagrams
Max. deviation - Version with reference
distance
± 10 mm (0.39 in)
Deviating upper dead band - Version with
reference distance
450 mm (17.7 in)
L
0
-2 mm (-0.079")
2 mm (0.079")
-10 mm (-0.394")
5 mm (0.197")
-5 mm (-0.197")
0,15 m (5.906")
0,03 m (1.18") 0,1 m
(3.937")
1
Fig. 32: Deviation VEGAFLEX 86 in coax version in water
1 Dead band - no measurement possible in this area
L Probe length
L
0
-2 mm (-0.079")
2 mm (0.079")
-10 mm (-0.394")
10 mm (0.394")
0,1 m (3.937")
0,05 m
(1.968")
0,1 m
(3.937")
0,25 m (9.842")
1 1
Fig. 33: Deviation VEGAFLEX 86 in coax version in oil
1 Dead band - no measurement possible in this area
L Probe length
Repeatability ≤ ±1 mm
Variables influencing measurement accuracy
Specifications for the digital measured value
Temperature drift - Digital output
±3 mm/10 K relating to the max. measuring range or
max. 10 mm (0.394 in)
Additional deviation through electromag-
netic interference acc. to EN 61326
< ±10 mm (< ±0.394 in)
4) 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
5) The dead bands can be optimizes by a false signal suppression.