Vega VEGAPULS 63, Руководство по эксплуатации

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72
11 Supplement
VEGAPULS 67 • 4 … 20 mA/HART - four-wire
36532-EN-160224
10 mm (0.394 in)
- 10 mm (- 0.394 in)
2 mm (0.079 in)
- 2 mm (- 0.079 in)
0
1 2 3
1,0 m
(3.280 ft)
Fig. 47: Deviation under reference conditions
1 Reference plane
2 Antenna edge
3 Recommended measuring range
Repeatability ≤ ±1 mm
Deviation with bulk solids The values depend to a great extent on the application.
Binding specifications are thus not possible.
Deviation under EMC influence ≤ ±30 mm
Variables influencing measurement accuracy
Specifications apply to the digital measured value
Temperature drift - Digital output ±3 mm/10 K, max. 10 mm
Additional deviation through electromag-
netic interference acc. to EN 61326
< ±50 mm
Specifications apply also to the current output
Temperature drift - Current output ±0.03 %/10 K relating to the 16 mA span max. ±0.3 %
Deviation on the current output through
analogue/digital conversion
< ±15 µA
Deviation in the current output due to
strong, high-frequency electromagnetic
fields acc. to EN 61326
< ±150 µA
Characteristics and performance data
Measuring frequency K-band (26 GHz technology)
Measuring cycle time approx. 700 ms
Step response time
2)
≤ 3 s
Beam angle
3)
10°
Emitted HF power (depending on the parameter adjustment)
4)
Ʋ Average spectral transmission power
density
-14 dBm/MHz EIRP
2)
Time span after a sudden measuring distance change by max. 0.5 m in liquid applications, max 2 m with bulk
solids applications, until the output signal has taken for the first time 90 % of the final value (IEC 61298-2).
3)
Outside the specified beam angle, the energy level of the radar signal is 50% (-3 dB) less.
4)
EIRP: Equivalent Isotropic Radiated Power.