UWT NivoGuide 8100, Instruction Manual

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61
NivoGuide® 8100 • Two-wire 4 … 20 mA/HART
9 Supplement
58878-EN-190215
L
2 mm
(0.079 ")
0
-2mm
(-0.079")
15mm
(0.591
"
)
-15mm
(-0.591")
0,35 m
(13.78")
0,2 m
(7.874")
0,2 m
(7.874")
0,05 m
(1.969")
1 1
Fig. 37: Deviation NivoGuide 8100 in cable version (ø 4 mm/0.157 in, PFA-coated), 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)
Specifications apply also to the current output
6)
Temperature drift - Current output ±0.03 %/10 K relating to the 16 mA span or max. ±0.3 %
Deviation in the current output due to digital/analogue conversion
Ʋ Non-Ex and Ex-ia version < ±15 µA
Additional deviation through electromag-
netic interference acc. to EN 61326
< ±150 µA
Influence of the superimposed gas and pressure on measurement 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 vapours.
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.
6)
Also for the additional current output (optional).