NivoRadar
®
Continuous level measurement
Series NR 4000
Technical information / Instruction manual
Technical data
page 12
0,25 m (0.8202 ft)
10 mm (0.3937 in)
- 10 mm (- 0.3937 in)
2 mm (0.0787 in)
- 2 mm (- 0.0787 in)
0
1
2
Fig. 6: Deviation under reference conditions
1)
1
Antenna edge, reference plane
2
Recommended measuring range
Variables influencing measurement accuracy
2)
Specifications apply to the digital measured value
Temperature drift - Digital value
< 3 mm/10 K, max. 5 mm
Specifications apply also to the current output
Temperature drift - Current output
< 0.03 %/10 K or max. 0.3 % relating to the 16.7 mA
span
Deviation in the current output due to
digital/analogue conversion
< 15 µA
Additional measurement 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
3)
≤ 250 ms
Step response time
4)
≤ 3 s
Beam angle
5)
4°
Emitted HF power (depending on the parameter setting)
6)
Ʋ
Average spectral transmission power
density
-3 dBm/MHz EIRP
1) In case of deviations from reference conditions, the offset due to installation can be up to ± 4 mm. This offset
can be compensated by the adjustment.
2) Determination of the temperature drift acc. to the limit point method
3) With operating voltage U
B
≥ 24 V DC
4) Time span after a sudden distance change from 1 m to 5 m until the output signal reaches 90 % of the final
value for the first time (IEC 61298-2). Valid with operating voltage U
B
≥ 24 V DC.
5) Outside the specified beam angle, the energy level of the radar signal is 50% (-3 dB) less.
6) EIRP: Equivalent Isotropic Radiated Power
