Endress+Hauser Levelflex FMP56 - Maximum Measured Error; Performance Characteristics; Reference Operating Conditions

Levelflex FMP56, FMP57
34 Endress+Hauser
Performance characteristics
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 %
• Reflection factor ≥ 0,8 (metal plate for rod and rope probe with min. 1 m (40 in) diameter)
• Flange for rod or rope probe ≥ 300 mm (12 in) diameter
• Distance to obstacles ≥ 1 m (40 in)
Maximum measured error
Typical data under reference operating conditions: DIN EN 61298-2, percentage values in relation to
the span.
Output: digital analog
1)
Sum of non-linearity,
nonrepeatability and
hysteresis
• Measuring distance up to 15 m (49 ft): ±2 mm (0.08 in)
• Measuring distance >15 m (49 ft): ±10 mm (0.39 in)
±0.02 %
Offset / Zero ±4 mm (0.16 in) ±0.03 %
1) Add error of the analogous value to the digital value.
If the reference conditions are not met, the offset/zero point arising from the mounting situation
may be up to ±12 mm (0.47 in) for rope and rod probes. This additional offset/zero point can be
compensated for by entering a correction (parameter "level correction") during commissioning.
Differing from this, the following measuring error is present in the vicinity of the lower probe
end:
-80 (-3.15)
-60 (-2.36)
-40 (-1.57)
-20 (-0.79)
0
20 (0.79)
40 (1.57)
60 (2.36)
80 (3.15)
0
A
D
DC = 2
DC = 80
50 (1.97)
100 (3.94) 150 (5.91)
200 (7.87)
40 (1.57) 80 (3.15)
20 (0.79)
250 (9.84) 300 (11.8)
A0021480
 11 Measuring error at the end-of-probe for rod and coax probes
A Distance from probe end [mm(in)]
D Measuring error: Sum of non-linearity, non-repeatability and hysteresis