User's Manual

DRAFT
Micropilot FMR51, FMR52
Endress+Hauser V. 1, Rev. 8, 4-10-2012 33
3 (0.12)
0
-3 (-12)
0 A 2 (6.6) D [m] ([ft])
20 (0.79)
-20 (-0.79)
R
D [mm] ([in])
A0019034
å 12
Maximum measured error in near-range applications; values for version with the "Advanced dynamics"
application package
D
Maximum measured error
D Distance from the reference point R
A Lower edge of the antenna
Measured value resolution
Dead band according to EN61298-2:
• digital: 1 mm
•
analog: 1 mA
Reaction time
The reaction time can be parametrized. The following step response times (as per DIN EN 61298-2)
1)
are
valid if the damping is switched off:
Tank height
Sampling rate Step response time
< 10 m (33 ft) ³ 3.6 s
–1
< 0.8 s
< 70 m (230 ft) ³ 2.2 s
–1
< 1 s
Influence of ambient
temperature
The measurements are carried out in accordance with EN 61298-3
• Digital (HART, PROFIBUS PA):
– Standard version: average T
K
= 2 mm/10 K; maximum 5 mm
– Version with advanced dynamics
2)
: average T
K
= 5 mm/10 K; maximum 15 mm
• 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
1) According to DIN EN 61298-2 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