Levelflex FMP51, FMP52, FMP54
36 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 (water surface for coax probe, 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)
• For interface measurement:
– Coax probe
– DC of the lower medium = 80 (water)
– DC of the upper medium = 2 (oil)
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
Level measurement:
• Measuring distance up to 15 m (49 ft): ±2 mm (0.08 in)
2)
• Measuring distance >15 m (49 ft): ±10 mm (0.39 in)
±0.02 %
Interface measurement:
• Measuring distance up to 500 mm (19.7 in): ±20 mm
(0.79 in)
• Measuring distance >500 mm (19.7 in): ±10 mm (0.39 in)
• If the thickness of the upper medium is <100 mm (3.94 in):
±40 mm (1.57 in)
Offset / Zero ±4 mm (0.16 in) ±0.03 %
1) Add error of the analogous value to the digital value.
2) For probes with centering stars, the accuracy may deviate close to the centering stars.
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.
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