VEGA VEGASON 66 4 … 20 mA_HART four-wire - Manual (Page 48)

Fulfilled NAMUR recommendation NE 43
Input variable
Parameter
- Version A distance between lower edge of the flange and
product surface
- version B, C and D distance between lower edge of the transducer
and product surface
Dead zone
- Version A 1.8 m (5.9 ft)
- Versions B, C, D 1.4 m (4.6 ft)
Measuring range
- Liquids up to 70 m (229.7 ft)
- Solids up to 45 m (147.6 ft)
Accuracy (similar to DIN EN 60770-1)
Reference conditions according to DIN EN 61298-1
- Temperature +18 … +30 °C (+64 … +86 °F)
- Relative humidity 45 … 75 %
- Air pressure 860 … 1060 mbar/86 … 106 kPa
(12.5 … 15.4 psi)
Characteristic curve deviation and measurement characteristics
7)
Average temperature coefficient of the
zero signal (temperature error elec-
tronics)
0.06 %/10 K
Resolution, general max. 1 mm
Ultrasonic frequency 10 kHz
Interval >2 s (dependent on the parameter adjustment)
Beam angle at -3 dB 6°
Adjustment time
8)
>3 s (dependent on the parameter adjustment)
Accuracy better than 0.2 % or ±6 mm (see diagram)
7) Relating to the nominal range, incl. hysteresis and repeatability, determined
according to the limit point method.
8) Time to output the correct level (with max. 10 % deviation) after a sudden
level change.
Supplement
48 VEGASON 66 - 4 ... 20 mA/HART - four-wire
28783
-EN
-060731