Vega VEGAPULS C 11 - Page 45

45
13 Supplement
VEGAPULS C 11 • Two-wire 4 … 20 mA
58340-EN-200806
Ʋ Reector Flatplatereector
Ʋ Falsereections Biggest false signal, 20 dB smaller than the useful signal
Deviation with liquids ≤5mm(meas.distance>0.25m/0.8202ft)
Non-repeatability
8)
≤5mm
Deviation with bulk solids The values depend to a great extent on the application.
Bindingspecicationsarethusnotpossible.
0,25 m (0.8202 ft)
10 mm (0.3937 in)
- 10 mm (- 0.3937 in)
5 mm (0.1969 in)
- 5 mm (- 0.1969 in)
0
1
2
Fig. 24: Deviation under reference conditions
9)
1 Antennaedge,referenceplane
2 Recommended measuring range
Variablesinuencingmeasurementaccuracy
Temperature drift - Current output <0.03%/10Krelatingtothe16mAspanor≤0.3%
Deviation in the current output due to
digital/analogue conversion
< 15 µA
Additional deviation through electromagnetic interference
Ʋ According to NAMUR NE 21 < 80 µA
Ʋ According to EN 61326-1 None
Ʋ According to IACS E10 (shipbuilding)/
IEC 60945
< 250 µA
Characteristics and performance data
Measuring frequency
W-band (80 GHz technology)
Measuring cycle time
10)
≤250ms
Step response time
11)
≤3s
Beam angle
12)
8°
8)
Already included in the meas. deviation.
9)
 Incaseofdeviationsfromreferenceconditions,theosetduetoinstallationcanbeupto+/-4mm.Thisoset
can be compensated by the adjustment.
10)
With operating voltage U
B
≥24VDC
11)
 Timespanafterasuddendistancechangefrom1mto5muntiltheoutputsignalreaches90%ofthenal
valueforthersttime(IEC61298-2).ValidwithoperatingvoltageU
B
≥24VDC.
12)
 Outsidethespeciedbeamangle,theenergyleveloftheradarsignalis50%(-3dB)less.