Vega VEGAPULS 63 Operating Instructions Manual page 62

11 Supplement
Ʋ QV (Fourth Value)
Resolution, digital
Accuracy (according to DIN EN 60770-1)
Process reference conditions according to DIN EN 61298-1
Ʋ Temperature
Ʋ Relative humidity
Ʋ Air pressure
Installation reference conditions
Ʋ Min. distance to installations
Ʋ Reflector
Ʋ False reflections
Deviation with liquids
10 mm (0.394 in)
2 mm (0.079 in)
0
- 2 mm (- 0.079 in)
- 10 mm (- 0.394 in)
1 2
Fig. 48: Deviation under reference conditions
1 Reference plane
2 Antenna edge
3 Recommended measuring range
Repeatability
Variables influencing measurement accuracy
Specifications apply to the HART signal and the current output
Temperature drift - Digital output
Additional deviation through electromag-
netic interference acc. to EN 61326
Specifications apply also to the current output
Temperature drift - Current output
Deviation on the current output by ana-
logue/digital conversion
Deviation on the current output due to
strong, high frequency electromagnetic
fields acc. to EN 61326
62
Scaled measured value
< 1 mm (0.039 in)
+18 ... +30 °C (+64 ... +86 °F)
45 ... 75 %
860 ... 1060 mbar/86 ... 106 kPa (12.5 ... 15.4 psig)
> 200 mm (7.874 in)
Plane plate reflector
Biggest false signal, 20 dB smaller than the useful signal
See following diagrams
0,5 m (1.6 ft)
≤ ±1 mm
±3 mm/10 K relating to the max. measuring range or
max. 10 mm
< ±50 mm
±0.03 %/10 K relating to the 16 mA span max. ±0.3 %
< ±15 µA
< ±150 µA
VEGAPULS 63 • 4 ... 20 mA/HART two-wire
3