Levelflex M FMP40
40 Endress+Hauser
Operating conditions: Environment
Ambient temperature range Ambient temperature at the electronics: -40 °C to +80 °C. The function of the LCD display is restricted at
T
A
< -20 °C and T
A
> +60 °C. A weather protection cover should be used for outdoor operation if the device
is exposed to direct sunlight.
Ambient temperature limits If temperatures above 80 °C are present at the process connection, the permitted ambient temperature is
reduced according to the following diagram (temperature derating):
L00-FMP40xxx-05-00-00-en-001
Storage temperature -40 °C to +80 °C
Climate class DIN EN 60068-2-38 (test Z/AD)
Degree of protection • With closed housing tested according to:
– IP68, NEMA6P (24 h at 1.83 m under water surface)
– IP66, NEMA4X
• With open housing: IP20, NEMA1 (also ingress protection of the display)
Caution!
Degree of protection IP68 NEMA6P applies for M12 PROFIBUS PA plugs only when the PROFIBUS cable is
plugged in.
Vibration resistance DIN EN 60068-2-64 / IEC 68-2-64: 20 to 2000 Hz, 1 (m/s
2
)
2
/Hz
Cleaning the probe Depending on the application, contamination or build-up 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 build-up, 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 EN 61326 and NAMUR Recommendation EMC (NE21). Details are provided
in the Declaration of Conformity. A standard installation cable is sufficient if only the analog signal is used.
Use a shielded cable when working with a superimposed communications signal (HART).
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 NE21 (EMC)
The measured value can be affected by strong electromagnetic fields when installing rod and rope probes
without a shielding/metallic wall, e.g. plastic, and in 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.
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