VEGA VEGASON 61 Foundation Fieldbus - Manual (Page 42)

42
10 Supplement
VEGASON 61 • Foundation Fieldbus
28790-EN-130417
Ʋ Temperature +18 … +30 °C (+64 … +86 °F)
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
70 kHz
Interval > 2 s (dependent on the parameter adjustment)
Abstrahlwinkel at -3 dB 11°
Step response or adjustment time 6) > 3 s (dependent on the parameter adjustment)
Measuring accuracy
Resolution, general
> 1 mm (0.039 in)
Deviation 7) 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. 28: Deviation VEGASON 61
Influence of the ambient temperature to the sensor electronics 8)
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 9)
6) Time to output the correct level (with max. 10 % deviation) after a sudden level change.
7) Incl. non-linearity, hysteresis and non-repeatability.
8) Relating to the nominal measuring range.
9) Tested according to the guidelines of German Lloyd, GL directive 2.