VEGA VEGASON 62 4 … 20 mA_HART - four-wire - Manual (Page 41)

41
10 Supplement
VEGASON 62 • 4 … 20 mA/HART - four-wire
28779-EN-130417
Ʋ Relative humidity 45 … 75 %
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
55 kHz
Interval > 2 s (dependent on the parameter adjustment)
Abstrahlwinkel at -3 dB 11°
Adjustment time 5) > 3 s (dependent on the parameter adjustment)
Measuring accuracy
Resolution, general
max. 1 mm
Deviation 6) see diagram
16 mm (0.63 in)
-16 mm (-0.63 in)
5 m
(16.404 ft)
6 m
(19.685 ft)
7 m
(22.966 ft)
8 m
(26.247 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. 25: Deviation VEGASON 62
Influence of the ambient temperature to the sensor electronics 7)
Average temperature coefficient of the
zero signal (temperature error)
0.06 %/10 K
Ambient conditions
Ambient, storage and transport tempera-
ture
-40 … +70 °C (-40 … +158 °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)
5) Time to output the correct level (with max. 10 % deviation) after a sudden level change.
6) Incl. non-linearity, hysteresis and non-repeatability.
7) Relating to the nominal measuring range.