Endress+Hauser Levelflex M FMP43 Operating Instructions Manual page 91

Levelflex M FMP43 FOUNDATION Fieldbus
Electromagnetic
compatibility (EMC)
Process temperature range
Process pressure limits
Dielectric constant
Endress+Hauser
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:
• Interferece emmision 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.
10.1.6 Operating conditions: Process
The maximum permitted temperature at the process connection (see figure measuring point) is
determined by the O-ring material ordered:
O-ring material Min. temperature
FFKM (Kalrez)
EPDM
P = 16 bar.
max
The specified range may be reduced by the selected process connection (→ Page 6).
The pressure rating (PN) specified on the flanges refers to a reference temperature of 20 °C, for
ASME flanges 100 °F. Observe pressure-temperature dependency.
Please refer to the following standards for the pressure values permitted for higher temperatures:
• EN 1092-1: 2001 Tab.18
With regard to their temperature stability properties, the materials 1.4404 and 1.4435 are
grouped under 13E0 in EN 1092-1 Tab.18. The chemical composition of the two materials can
be identical.
• ASME B 16.5a - 1998 Tab. 2-2.2 F316
• ASME B 16.5a - 1998 Tab. 2.3.8 N10276
• JIS B 2220
ε
r ≥ 1.6
Max. temperature
-20 °C +150 °C
-20 °C +130 °C
Technical data
measured
here
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