Endress+Hauser Micropilot M FMR231, Руководство по эксплуатации

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Mounting Micropilot M FMR231 with FOUNDATION Fieldbus
18 Hauser
Measuring range
The usable measuring range depends on the size of the antenna, the reflectivity of the medium, the
mounting location and eventual interference reflections.
The maximum configurable range is:
• 20 m (65 ft) for Micropilot M FMR23x,
• 20 m (65 ft) for Micropilot M FMR24x,
– 40 m (131 ft) for Micropilot M FMR24x with additional option D (E), see "ordering
information",
– 70 M (229 ft) for Micropilot M FMR24x with additional option F (G), see "ordering
information",
• 70 m (229 ft) for Micropilot M FMR250 (further informations see TI390F/00/en).
The following tables describe the groups of media as well as the achievable measuring range as a
function of application and media group. If the dielectric constant of a medium is unknown, it is
recommended to assume media group B to ensure a reliable measurement.
Media group DC (
ε
r) Examples
A 1,4...1,9 non-conducting liquids, e.g. liquefied gas
1))
1) Treat Ammonia NH
3
as a medium of group A, i.e. use FMR230 in a stilling well.
B 1,9...4 non-conducting liquids, e.g. benzene, oil, toluene, …
C 4...10 e.g. concentrated acids, organic solvents, esters, aniline, alcohol, acetone, …
D > 10 conducting liquids, e.g. aqueous solutions, dilute acids and alkalis