VEGA VEGAPULS 61 (≥ 2.0.0 - ≥ 4.0.0) Modbus and Levelmaster protocol - Manual (Page 63)

63
11 Supplement
VEGAPULS 61 • Modbus and Levelmaster protocol
41361-EN-121011
Deviation with bulk solids The values depend to a great extent on the application.
Binding specifications are thus not possible.
Variables influencing measurement accuracy
Temperature drift - Digital output
±3 mm/10 K relating to the max. measuring range or
max. 10 mm
Additional deviation through strong, high
frequency electromagnetic fields acc. to
EN 61326
< ±50 mm
Characteristics and performance data
Measuring frequency
K-band (26 GHz technology)
Measuring cycle time
Ʋ Standard electronics approx. 450 ms
Ʋ Electronics with increased sensitivity
approx.
700 ms
Step response time 1) ≤ 3 s
Tracking speed of the measuring window
max.
1 m/min
Beam angle 2)
Ʋ Encapsulated antenna system 22°
Ʋ Plastic horn antenna 10°
Emitted HF power (depending on the parameter adjustment) 3)
Ʋ Average spectral transmission power
density
-14 dBm/MHz EIRP
Ʋ Max. spectral transmission power
density
+43 dBm/50 MHz EIRP
Ʋ Max. power density in a distance of
1 m
< 1 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 lower value
always applies.
Vessel pressure
Ʋ Encapsulated antenna system -1 … 3 bar (-100 … 300 kPa/-14.5 … 43.5 psi)
Ʋ Plastic horn antenna -1 … 2 bar (-100 … 200 kPa/-14.5 … 29.0 psig)
Ʋ Version with adapter flange from
DN 150 PP
-1 … 1 bar (-100 … 100 kPa/-14.5 … 14.5 psig)
1) 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).
2) Outside the specified beam angle, the energy of the radar signal has a level which is reduced by 50 % (-3 dB)
3) EIRP: Equivalent Isotropic Radiated Power