VEGA VEGAPULS 61 (≥ 2.0.0 - ≥ 4.0.0) 4 … 20 mA_HART - four-wire User Manual
Page 65
65
11 Supplement
VEGAPULS 61 • 4 … 20 mA/HART - four-wire
36500-EN-121011
Signal resolution
0.3 µA
Failure signal current output (adjustable) mA-value unchanged 20.5 mA, 22 mA, < 3.6 mA
Max. output current
22 mA
Starting current
≤ 3.6 mA
Load (4 … 20 mA/HART - active)
< 500 Ω
Damping (63 % of the input variable)
0 … 999 s, adjustable
HART output values
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)
- 10 mm (- 0.394 in)
2 mm (0.079 in)
- 2 mm (- 0.079 in)
0
1 2
3
Fig. 51: Deviation under reference conditions - encapsulated antenna system
1 Reference plane
2 Antenna edge
3 Recommended measuring range