VEGA VEGAPULS 62 (≥ 2.0.0 - ≥ 4.0.0) Modbus and Levelmaster protocol Approval according to LPR radio standard User Manual
Page 63
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False reflections
Largest false echo 20 dB smaller than the useful
echo
Deviation with liquids
See following diagrams
0,5 m (1.6 ft)
10 mm (0.394 in)
2 mm (0.079 in)
- 2 mm (- 0.079 in)
- 10 mm (- 0.394 in)
0
1 2
3
Fig. 44: Deviation under reference conditions
1
Reference plane
2
Antenna edge
3
Recommended measuring range
Reproducibility
≤ ±
1 mm
Deviation with bulk solids
The values depend to a great extent on the
application. Binding specifications are thus not
possible.
Variables influencing measurement accuracy
Temperature drift - Digital output
±
3 mm/10 K relating to the max. measuring range
or max. 10 mm
Additional deviation through strong, high
frequency electromagnetic fields acc. to EN
61326
< ±
50 mm
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.
VEGAPULS
62 • Approval according to LPR radio standard
63
10 Supplement
41722
-EN
-120706