Endress+Hauser Levelflex M FMP40 - Page 103

Levelflex M FMP40 FOUNDATION Fieldbus Technical data
Endress+Hauser 103
10.1.5 Operating conditions: Environment
Ambient temperature range Ambient temperature for the transmitter: -40 °C to +80 °C. The functionality of the LCD display
may be limited for temperatures Ta < -20 °C and Ta > +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)
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.
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.
T [°C]
T [°C]
-40 0 50
-40
0
40
60
80
100
150
80
max. process connection temperature
max. ambient temperature
80 °C with separate
housing
75 °C with distance
sleeve
65 °C standard compact
F12/T12 housing
60 °C standard compact
F23 housing