Endress+Hauser Levelflex M FMP41C Operating Instructions Manual page 84

Technical data
Ambient temperature range
Ambient temperature limits
Storage temperature
Climate class
Vibration resistance
Cleaning the probe
Electromagnetic
compatibility (EMC)
84
10.1.4 Operating conditions: Environment
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.
If temperatures above 80 °C are present at the process connection, the permitted ambient
temperature is reduced according to the following diagram (temperature derating):
T
1
T
2
-40 °C to +80 °C
DIN EN 60068-2-38 (test Z/AD)
DIN EN 60068-2-64 / IEC 68-2-64: 20 to 2000 Hz, 1 (m/s
Depending on the application, contamination or build-up can accumulate on the probe. A thin, even
layer only influences measurement slightly. Thick layer 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 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. plastiv, 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.
max. ambient temperature
T [°C]
1
80
60
40
0
-40
-40 0
Levelflex M FMP41C PROFIBUS PA
80 °C with separate
55 °C
40 °C compact:
80 100 150 200
max. process connection temperature
L00-FMP41xxx-05-00-00-en-001
2 2
) /Hz
Endress+Hauser
housing
compact:
F12 housing
T12 housing
F23 housing
[°C]
T
2