74
11 Supplement
VEGAPULS 69 • Two-wire 4 … 20 mA/HART
47247-EN-200427
Recommended min. distance for typical bulk solids applications
4)
Ʋ Plastic horn antenna, metal-jacketed
lens antenna
250 mm (9.843 in)
Ʋ Thread with integrated horn antenna 500 mm (19.69 in)
Dead zone
150 mm (5.906 in)
Variables influencing the deviation
Specifications apply to the digital measured value
Temperature drift - Digital output
≤ 3 mm/10 K, max. 10 mm
Specifications apply also to the current output
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
Characteristics and performance data
Measuring frequency
W-band (within 75 - 85 GHz)
Measuring cycle time
approx. 700 ms
Step response time
5)
≤ 3 s
Beam angle
6)
Ʋ Plastic horn antenna
3.5°
Ʋ Metal-jacketed lens antenna
4°
Ʋ Thread with integrated horn antenna 7°
Emitted HF power (depending on the parameter setting)
7)
Ʋ Average spectral transmission power
density
-3 dBm/MHz EIRP
Ʋ Max. spectral transmission power
density
+34 dBm/50 MHz EIRP
Ʋ Max. power density at a distance of
1 m
< 3 µW/cm²
Ambient conditions
Ambient, storage and transport tempera-
ture
-40 … +80 °C (-40 … +176 °F)
Process conditions
For the process conditions, please also note the specifications on the type label. The lowest value
always applies.
Process temperature
4)
Depending of the reflective properties of the measured media.
5)
Time span (after a sudden measuring distance change of max. 2 m in bulk solids applications) until the output
signal has taken on 90 % of the final value for the first time (IEC 61298-2).
6)
Outside the specified beam angle, the energy level of the radar signal is 50% (-3 dB) less.
7)
EIRP: Equivalent Isotropic Radiated Power
