Micropilot FMR51, FMR52
34 Endress+Hauser
3 (0.12)
0
-3 (-12)
A 2 (6.6) D [m] ([ft])
20 (0.79)
-20 (-0.79)
R
D [mm] ([in])
A0019034
11 Maximum measured error in near-range applications; values for version with the "Advanced dynamics"
application package
Δ Maximum measured error
A Lower edge of the antenna
D Distance from the lower edge A of the antenna
R Reference point of the distance measurement
Measured value resolution
Dead band according to DIN EN IEC 61298-2 / DIN EN IEC 60770-1:
• digital: 1 mm
• analog: 1 μA
Reaction time
The reaction time can be parametrized. The following step response times (as per DIN EN IEC
61298-2 / DIN EN IEC 60770-1)
1)
are valid if the damping is switched off:
Tank height Sampling rate Step response time
< 10 m (33 ft) ≥ 3.6 s
–1
< 0.8 s
< 70 m (230 ft) ≥ 2.2 s
–1
< 1 s
Influence of ambient
temperature
The measurements are carried out in accordance with DIN EN IEC 61298-3 / DIN EN IEC
60770-1
• Digital (HART, PROFIBUS PA, FOUNDATION Fieldbus):
– Standard version: average T
K
= 2 mm/10 K
– Version with advanced dynamics
2)
: average T
K
= 3 mm/10 K
• Analog (current output):
– zero point (4 mA): average T
K
= 0.02 %/10 K
– span (20 mA): average T
K
= 0.05 %/10 K
Influence of gas layer
High pressures reduce the propagation velocity of the measuring signals in the gas/vapor above the
fluid. This effect depends on the kind of gas/vapor and of its temperature. This results in a
systematic measuring error that gets bigger as the distance increases between the reference point of
the measurement (flange) and the product surface. The following table illustrates this measured
1) According to DIN EN IEC 61298-2 / DIN EN IEC 60770-1 the response time is the time which passes after a sudden change of the input signal
until the output signal for the first time assumes 90% of the steady-state value.
2) Feature 540 "Application Package", option EM
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