1
8
10 Supplement
NCR-21 4 … 20 mA
54408-01-190131
Damping (63 % of the input variable),
adjustable
0 … 999 s
Deviation (according to DIN EN 60770-1)
Process reference conditions according to DIN EN 61298-1
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)
Installation reference conditions
Ʋ Min. distance to internal installations > 200 mm (7.874 in)
Ʋ Reflector
Flat plate reflector
Ʋ False reflections
Biggest false signal, 20 dB smaller than the useful signal
Deviation with liquids
≤ 5 mm (meas. distance > 0.5 m/1.640 ft)
Non-repeatability
5)
≤ 1 mm
Deviation with bulk solids
The values depend to a great extent on the application.
Binding specifications are thus not possible.
0,5 m (1.640 ft)
10 mm (0.394 in)
- 10 mm (- 0.394 in)
5 mm (0.197 in)
- 5 mm (- 0.197 in)
0
1
2
Abb. 33: Deviation under reference conditions
1 Reference plane
2 Measuring range
Characteristics and performance data
Measuring frequency
K-band (26 GHz technology)
Measuring cycle time
approx. 450 ms
Step response time
6)
≤ 3 s
Beam angle
7)
10°
Emitted HF power
8)
Ʋ Average spectral transmission power
density
-34 dBm/MHz EIRP
Ʋ Max. spectral transmission power
density
+6 dBm/50 MHz EIRP
Ʋ Max. power density at a distance of
1 m
< 1 µW/cm²
5)
Already included in the meas. deviation
6)
Time span after a sudden distance change of max. 0.5 m until the output signal reaches for the first time 90% of
the final value (IEC 61298-2).
7)
Outside the specified beam angle, the energy level of the radar signal is 50% (-3 dB) less.
8)
EIRP: Equivalent Isotropic Radiated Power
925-0374
