VEGA VEGAPULS 62 (≥ 2.0.0 - ≥ 4.0.0) 4 … 20 mA_HART - two-wire User Manual
Page 67
67
11 Supplement
VEGAPULS 62 • 4 … 20 mA/HART - two-wire
36503-EN-121011
Max. output current
22 mA
Starting current
≤ 3.6 mA; ≤ 10 mA for 5 ms after switching on
Load
see load diagram under Power supply
Damping (63 % of the input variable),
adjustable
0 … 999 s
HART output values according to HART 7.0
1)
Ʋ PV (Primary Value)
Distance to the level
Ʋ SV (Secondary Value)
Level as percentage value
Ʋ TV (Third Value)
Linearised percentage value
Ʋ QV (Fourth Value)
Scaled measured value
Resolution, digital
< 1 mm (0.039 in)
Accuracy (according to DIN EN 60770-1)
Process reference conditions according to DIN EN 61298-1
Ʋ Temperature
+18 … +30 °C (+64 … +86 °F)
Ʋ Relative humidity
45 … 75 %
Ʋ Air pressure
860 … 1060 mbar/86 … 106 kPa (12.5 … 15.4 psig)
Installation reference conditions
Ʋ Min. distance to installations
> 200 mm (7.874 in)
Ʋ Reflector
Plane plate reflector
Ʋ 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. 56: 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
Specifications apply to the HART signal and the current output
1)
Default values, can be assigned individually