VEGA VEGAFLEX 86 4 … 20 mA_HART two-wire Coax probe With SIL qualification - Manual (Page 79)

79
12 Supplement
VEGAFLEX 86 • 4 … 20 mA/HART two-wire
44231-EN-130823
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. 42: 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. 43: Deviation VEGAFLEX 86 in coax version in oil
1 Dead band - no measurement possible in this area
L Probe length
Repeatability ≤ ±1 mm
Specification for safety accuracy (SIL) Siehe Safety Manual
Influence of the superimposed gas and pressure to the accuracy
The propagation speed of the radar impulses in gas or vapour above the medium is reduced by
high pressure. This effect depends on the superimposed gas or vapour and is especially large at
low temperatures.
The following table shows the resulting deviation for some typical gases and vapours. The specified
values refer to the distance. Positive values mean that the measured distance is too large, negative
values that the measured distance is too small.