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Level Radar LCR20
Performance Characteristics
9
Performance Characteristics
9.1
Reference Operating Conditions
•
Temperature = +24 °C (+75 °F) ±5 °C (±9 °F)
•
Pressure = 960 mbar abs. (14 psia) ±100 mbar (±1.45 psi)
•
Humidity = 60 % ±15 %
•
Reflector: metal plate with diameter ≥ 1 m (40 inch)
•
No major interference reflections inside the signal beam
9.2
Maximum Measured Error
Typical data under reference operating conditions: DIN EN 61298-2, percentage values in
relation to the span.
Output, digital
(HART, P+F Level (app))
•
Sum of non-linearity, non-repeatability and hysteresis: ±2 mm (±0.08 inch)
•
Offset/zero point: ±4 mm (±0.16 inch)
Output, analog
Only relevant for 4 to 20 mA current output; add error of the analog value to the digital value
•
Sum of non-linearity, non-repeatability and hysteresis: ±0.02 %
•
Offset/zero point: ±0.03 %
Differing values in near-range applications
Figure 9.1
Maximum measured error
R
Reference point of the distance measurement
D
Distance from reference point of antenna
20 (0.79)
10 (0.39)
2 (0.08)
0
-2 (-0.08)
-10 (-0.39)
-20 (-0.79)
0.1 (0.33)
R
Maximum measured error in near-range applications; values for standard version
0.5 (1.67)
D[m (ft)]
19
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