Endress+Hauser Profi Bus Levelflex M FMP40 - Page 108

Technical data Levelflex M FMP40 with PROFIBUS PA
108 Endress + Hauser
10.1.4 Operating conditions: Environment
Ambient temperature range 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.
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 … +80 °C (-40 °F … +176°F)
Climate class DIN EN 60068-2-38 (test Z/AD)
Vibration resistance DIN EN 60068-2-64 / IEC 68-2-64: 20…2000 Hz, 1 (m/s
2
)
2
/Hz
Cleaning the probe 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
Electromagnetic
compatibility (EMC)
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.
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