Levelflex FMP55
52 Endress+Hauser
Storage temperature
–40 to +80 °C (–40 to +176 °F)
Climate class
DIN EN 60068-2-38 (test Z/AD)
Altitude according to
IEC61010-1 Ed.3
• Generally up to 2 000 m (6 600 ft) above MSL.
• Above 2 000 m (6 600 ft) if the following conditions are met:
– Ordering feature 020 "Power supply; Output" = A, B, C, E or G (2-wire versions)
– Supply voltage U < 35 V
– Supply voltage of overvoltage category 1
Degree of protection
• With closed housing tested according to:
– IP68, NEMA6P (24 h at 1.83 m under water surface)
6)
– For plastic housing with transparent cover (display module): IP68 (24 h at 1.00 m under water
surface)
7)
– IP66, NEMA4X
• With open housing: IP20, NEMA1
• Display module: IP22, NEMA2
Degree of protection IP68 NEMA6P applies for M12 PROFIBUS PA plugs only when the
PROFIBUS cable is plugged in and is also rated IP68 NEMA6P.
Vibration resistance
DIN EN 60068-2-64 / IEC 60068-2-64: 20 to 2 000 Hz, 1 (m/s
2
)
2
/Hz
Cleaning the probe
Depending on the application, contamination or buildup can accumulate on the probe. A thin, even
layer only influences measurement slightly. Thick layers can dampen the signal and then reduce the
measuring range. Severe, uneven buildup, adhesion e.g. through crystallization, can lead to incorrect
measurement. In this case, we recommend that you use a non-contact measuring principle, or check
the probe regularly for soiling.
Electromagnetic
compatibility (EMC)
Electromagnetic compatibility to all relevant requirements of the EN 61326- series and NAMUR
recommendation EMC (NE21). For details see declaration of conformity
8)
. If only the analogue
signal is used, unshielded interconnection lines are sufficient for the installation. In case of using the
digital signal (HART/ PA/ FF) use shielded interconnection lines.
Use a shielded cable when working with a digital communications signal.
Max. fluctuations during EMC- tests: < 0.5 % of the span.
When installing the probes in metal and concrete tanks and when using a coax probe:
• Interference emission to EN 61326 - x series, electrical equipment Class B.
• Interference immunity to EN 61326 - x series, requirements for industrial areas and NAMUR
Recommendation NE 21 (EMC)
The measured value can be affected by strong electromagnetic fields when installing rod and rope
probes without a shielding/metallic wall, e.g. in plastic and wooden silos.
• Interference emission to EN 61326 - x series, electrical equipment Class A.
• Interference immunity: the measured value can be affected by strong electromagnetic fields.
6) also valid for the "Sensor remote" version
7) This restriction is valid if the following options of the product structure have been selected at the same time: 030 ("Display, Operation") = C
("SD02") or E ("SD03"); 040 ("Housing") = A ("GT19").
8) Can be downloaded from www.endress.com.
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