Endress+Hauser Fieldbus Levelflex M FMP41C Operating Instructions Manual page 91

Levelflex M FMP41C with FOUNDATION Fieldbus
Ambient temperature range
Ambient temperature limits
Storage temperature
Climate class
Vibration resistance
Cleaning the probe
Electromagnetic
compatibility (EMC)
Endress + Hauser
10.1.4 Operating conditions: Environment
Ambient temperature for the transmitter: -40 °C ... +80 °C (-40 °F ... +176 °F)
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 instrument 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 ... +80 °C (-40 °F ... +176°F)
DIN EN 60068-2-38 (test Z/AD)
DIN EN 60068-2-64 / IEC 68-2-64: 20...2000 Hz, 1 (m/s
Depending on the application, soilings or sediments 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. Heavy, uneven build-up, adhesion e.g. through crystallisation, 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
When installing the probes in metal and concrete tanks and when using a coax probe:
• Interference Emission to EN 61326, Electrical Equipment Class B
• Interference immunity to EN 61326, Annex A (Industrial area) 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. plastic, and in wooden silos.
• Interference emission to EN 61326, Class A equipment.
• Interference immunity: the measured value can be affected by strong electromagnetic fields.
max. ambient temperature
[°C]
T
1
80
60
40
0
-40
-40 0
Technical data
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
housing
compact:
F12 housing
T12 housing
F23 housing
T [°C]
2
91