Vega VEGASON 61 Operating Instructions Manual page 50

10 Supplement
Ʋ HART value (3rd Value)
Resolution
Fault signal, current output (adjustable)
Current limitation
Load
Damping (63 % of the input variable)
Met NAMUR recommendation
Deviation
Deviation
11)
10 mm (0.394 in)
4 mm (0.157 in)
-4 mm (-0.157 in)
-10 mm (-0.394 in)
Fig. 30: Deviation VEGASON 61
Reference conditions to measurement accuracy (according to DIN EN 60770-1)
Reference conditions according to DIN EN 61298-1
Ʋ Temperature
Ʋ Relative humidity
Ʋ Air pressure
Other reference conditions
Ʋ Reflector
Ʋ False reflections
Measuring characteristics
Ultrasonic frequency
Interval
Abstrahlwinkel at -3 dB
Step response or adjustment time
Influence of the ambient temperature to the sensor electronics
Average temperature coefficient of the
zero signal (temperature error)
With inductive load ohmic share min. 25 Ω/mH.
10)
Incl. non-linearity, hysteresis and non-repeatability.
11)
Time to output the correct level (with max. 10 % deviation) after a sudden level change.
12)
Relating to the nominal measuring range.
13)
50
Distance to the level - scaled
1.6 µA
mA-value unchanged 20.5 mA, 22 mA, < 3.6 mA
22 mA
< 500 Ω
0 ... 999 s, adjustable
NE 43
≤ 4 mm (meas. distance ≤ 2.0 m/6.562 ft)
1 m (3.28 ft) 2 m (6.562 ft)
+18 ... +30 °C (+64 ... +86 °F)
45 ... 75 %
860 ... 1060 mbar/86 ... 106 kPa (12.5 ... 15.4 psig)
ideal reflector, e.g. metal plate 2 x 2 m (6.56 x 6.56 ft)
Biggest false signal, 20 dB smaller than the useful signal
70 kHz
> 2 s (dependent on the parameter adjustment)
11°
> 3 s (dependent on the parameter adjustment)
12)
0.06 %/10 K
10)
3 m (9.843 ft) 4 m (13.123 ft)
13)
VEGASON 61 • Four-wire 4 ... 20 mA/HART
5 m (16.404 ft)