VEGA VEGASON 61 4 … 20 mA_HART - two-wire - Manual (Page 43)

43
10 Supplement
VEGASON 61 • 4 … 20 mA/HART - two-wire
28775-EN-130417
Ʋ Air pressure 860 … 1060 mbar/86 … 106 kPa (12.5 … 15.4 psig)
Other reference conditions
Ʋ Reflector ideal reflector, e.g. metal plate 2 x 2 m (6.56 x 6.56 ft)
Ʋ False reflections Biggest false signal, 20 dB smaller than the useful signal
Measuring characteristics
Ultrasonic frequency
70 kHz
Interval > 2 s (dependent on the parameter adjustment)
Abstrahlwinkel at -3 dB 11°
Step response or adjustment time 4) > 3 s (dependent on the parameter adjustment)
Measuring accuracy
Resolution, general
> 1 mm (0.039 in)
Deviation 5) see diagram
5 m (16.404 ft) 4 m (13.123 ft) 3 m (9.843 ft) 2 m (6.562 ft) 1 m (3.28 ft)
10 mm (0.394 in)
4 mm (0.157 in)
-10 mm (-0.394 in)
-4 mm (-0.157 in)
Fig. 29: Deviation VEGASON 61
Influence of the ambient temperature to the sensor electronics 6)
Average temperature coefficient of the
zero signal (temperature error)
0.06 %/10 K
Ambient conditions
Ambient, storage and transport tempera-
ture
-40 … +80 °C (-40 … +176 °F)
Process conditions
Process pressure
-20 … 200 kPa/-0.2 … 2 bar (-2.9 … 29 psig)
Process temperature (transducer tem-
perature)
-40 … +80 °C (-40 … +176 °F)
Vibration resistance mechanical vibrations with 4 g and 5 … 100 Hz 7)
Electromechanical data - version IP 66/IP 67 and IP 66/IP 68; 0.2 bar
Cable entry/plug
8)
4) Time to output the correct level (with max. 10 % deviation) after a sudden level change.
5) Incl. non-linearity, hysteresis and non-repeatability.
6) Relating to the nominal measuring range.
7) Tested according to the guidelines of German Lloyd, GL directive 2.
8) Depending on the version M12 x 1, according to DIN 43650, Harting, 7/8" FF.