VEGA VEGASON 64 Foundation Fieldbus User Manual
Page 49
Input variable
Measured value
-
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
Measuring range
-
Liquids
up to 25 m (82.02 ft)
-
Bulk solids
up to 15 m (49.21 ft)
Dead band
1 m (3.3 ft)
Reference conditions to measuring 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 psig)
Other reference conditions
-
Reflector
ideal reflector, e.g. metal plate 2 x 2 m (6.56 x 6.56 ft)
-
False reflections
Biggest false echo, 20 dB smaller than the useful
echo
Measuring characteristics
Ultrasonic frequency
30 kHz
Interval
> 2
s (dependent on the parameter adjustment)
Beam angle at 3 dB
4°
Adjustment time
6)
> 3
s (dependent on the parameter adjustment)
Measuring accuracy
Resolution, general
> 1
mm (0.039 in)
Deviation
7)
see diagram
6)
Time to output the correct level (with max. 10 % deviation) after a sudden
level change.
7)
Incl. non-linearity, hysteresis and non-repeatability.
VEGASON
64 • Foundation Fieldbus
49
10 Supplement
28793
-
EN
-081127