VEGA VEGAPULS 68 (≥ 2.0.0 - ≥ 4.0.0) 4 … 20 mA_HART - four-wire - Manual (Page 65)

65
11 Supplement
VEGAPULS 68 • 4 … 20 mA/HART - four-wire
36536-EN-121011
Input variable
Measured variable
The measured quantity is the distance between process
fitting of the sensor and product surface. The reference
plane is the seal surface on the hexagon or the lower
side of the flange.
3
4
2
1
Fig. 48: Data of the input variable
1 Reference plane
2 Measured variable, max. measuring range
3 Antenna length
4 Useful measuring range
Max. measuring range 75 m (246.1 ft)
Recommended meas. range depending on the antenna diameter
Ʋ ø 40 mm (1.575 in) up to 15 m (49.21 ft)
Ʋ ø 48 mm (1.89 in) up to 20 m (65.62 ft)
Ʋ ø 75 mm (2.953 in) up to 40 m (131.2 ft)
Ʋ ø 95 mm (3.74 in) up to 50 m (164 ft)
Ʋ Parabolic antenna up to 75 m (246.1 ft)
Output variable
Output signals
4 … 20 mA/HART - active; 4 … 20 mA/HART - passive
Terminal voltage passive 9 … 30 V DC
Shortcircuit protection Available
Potential separation Available
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