Blocking Distance; Measuring Frequency Spectrum; Output; Output Signal - Endress+Hauser Levelflex FMP51 Technical Information

Levelflex FMP51, FMP52, FMP54

Blocking distance

Measuring frequency
spectrum

Output signal

1) for FMP54 always contain, for FMP51/52 optionally available
Endress+Hauser
• Reduction of the max. possible measuring range through buildup, above all of moist products.
• Due to the high diffusion rate of ammonia it is recommended with gas-tight bushing
in this medium.
The upper blocking distance (= UB) is the minimum distance from the reference point of the measurement
(mounting flange) to the maximum level.
R
LN
R = reference point of measurement
LN = probe length
UB = upper blocking distance
Blocking distance (factory setting):
• with coax probes: 0 mm (0 in)
• with rod and rope probes up to 8 m (26 ft): 200 mm (8 in)
• with rod and rope probes exceeding a length of 8 m (26 ft): 0.025 * (length of probe)
The specified blocking distances are preset on delivery. Depending on the application these settings can
be changed.
For rod and rope probes and for media with DC > 7 (or generally for stilling well/bypass applications) the
blocking distance may be reduced to 100 mm (4").
Within the blocking distance, a reliable measurement can not be guaranteed.
A safety distance SD can be defined below the blocking distance. A warning is generated if the level rises
into this blocking distance.
100 MHz to 1.5 GHz

Output

HART
Signal coding
Data transmission rate
Galvanic isolation
UB
SD
E
E = empty calibration (= zero)
F = full calibration (= span)
SD = safety distance
FSK ±0.5 mA over currency signal
1200 Baud
Yes
1)
for measurements
100%
F
0%
A0011279
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