VEGA VEGAPULS SR 68 4 … 20 mA_HART - four-wire - Manual (Page 66)

66
11 Supplement
VEGAPULS SR 68 • 4 … 20 mA/HART - four-wire
38295-EN-130624
3
4
2
1
Fig. 47: Data of the input variable
1 Reference plane
2 Measured variable, max. measuring range
3 Antenna length
4 Useful measuring range
Max. measuring range 30 m (98.43 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), 95 mm (3.74 in) up to 30 m (98.43 ft)
Ʋ Parabolic antenna up to 30 m (98.43 ft)
Output variable
Output signals
4 … 20 mA/HART - active; 4 … 20 mA/HART - passive
Range of the output signal 3.8 … 20.5 mA/HART (default setting)
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