Micropilot FMR60B PROFINET with Ethernet-APL
Endress+Hauser 19
Differing values in near-range applications
0.8 (2.62)
4 (0.16)
1 (0.04)
-1 (-0.04)
-4 (-0.16)
D [m (!)]
∆ [mm (in)]
R
0
A0032636
9 Maximum measured error in near-range applications
Δ Maximum measured error
R Reference point of the distance measurement
D Distance from reference point of antenna
Measured value resolution
Dead band according to DIN EN IEC 61298-2/DIN EN IEC 60770-1:
Digital: 1 mm
Response time
According to DIN EN IEC 61298-2 / DIN EN IEC 60770-1 , the step response time is the time
following an abrupt change in the input signal up until the changed output signal has adopted 90 %
of the steady-state value for the first time.
The response time can be configured.
The following step response times apply (in accordance with DIN EN IEC 61298-2/DIN EN IEC
60770-1) when damping is switched off:
• Pulse frequency ≥ 5/s (cycle time ≤ 200 ms)
• Step response time < 1 s
Influence of ambient
temperature
The output changes due to the effect of the ambient temperature with respect to the reference
temperature.
The measurements are performed according to DIN EN IEC 61298-3/DIN EN IEC 60770-1
Average T
C
= 2 mm/10 K
Influence of gas phase
High pressure reduces the speed of propagation of the measuring signals in the gas/vapor above the
medium. This effect depends on the type of gas phase and its temperature. This results in a
systematic measured error that increases with increasing distance between the reference point of
the measurement (flange) and the surface of the product. The following table shows this measured
error for some typical gases/vapors (with regard to the distance, a positive value means that an
excessively large distance is measured):
Measured error for some typical gases/vapors
Gas phase Temperature Pressure
1 bar (14.5 psi) 10 bar (145 psi) 25 bar (362 psi)
Air/nitrogen +20 °C (+68 °F) 0.00 % +0.22 % +0.58 %
+200 °C (+392 °F) –0.01 % +0.13 % +0.36 %
+400 °C (+752 °F) –0.02 % +0.08 % +0.29 %
Hydrogen +20 °C (+68 °F) –0.01 % +0.10 % +0.25 %
+200 °C (+392 °F) –0.02 % +0.05 % +0.17 %
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