Input; Measured Variable; Measuring Range - Endress+Hauser Levelflex M FMP40 Series Technical Information

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Measured variable

Measuring range

ε
Medium group DC ( r)
1 1.4 to 1.6 —
– Plastic granulate
– White lime, special cement
2 1.6 to 1.9
– Sugar
– Portland cement, plaster
3 1.9 to 2.5
– Flour
– Grain, seeds
– Ground stones
4 2.5 to 4
– Sand
– Naturally moist (ground)
5 4 to 7
– Salt
– Metallic powder
6 > 7 – Carbon black
– Coal
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10
Note!
The number of instruments which can be connected in multidrop mode can be calculated by the
"FieldNetCalc" program. A description of this program can be found in Technical Information TI 400F
(Multidrop Connector FXN520). The program is available from your Endress+Hauser sales organization or on
the Internet at: "www.de.endress.com Download" (Text Search = "Fieldnetcalc").

Input

The measured variable is the distance between the reference point (see Fig. on page 35) and the product
surface.
Subject to the empty distance entered (E, see Fig. on page 4), the level is calculated.
Alternatively, the level can be converted into other variables (volume, mass) by means of linearization (32
points).
Level measurement
The following table describes the media groups and the possible measuring range as a function of the media
group.
Typical bulk solids
– Condensed gases, e.g. N
– Liquefied gas, e.g. propane
– Solvent
– Freon
– Palm oil
– Mineral oils, fuels
—
⎯
– Benzene, styrene, toluene
– Furan
– Naphthalene
– Chlorobenzene, chloroform
stones, ores – Cellulose spray
– Isocyanate, aniline
– Aqueous solutions
– Alcohols
– Ammonia
The respective lower group applies for very loose or loosened bulk solids.
Reduction of the max. possible measuring range through:
• Extremely loose surfaces of bulk solids, e.g. bulk solids with low bulk weight for pneumatic filling.
• Buildup, above all of moist products.
Note!
Due to the high diffusion rate of ammonia it is recommended to use the FMP45 with gas-tight bushing for
measurements in this medium.
Interface measurement
The measuring range for interface measurement is limited to 33 ft (10 m). Larger measuring range available on
request.
Typical liquids
bare metallic probes
, CO 15 ft (4 m), only coax probe
2 2
82 to 98 ft (25 to 30 m)
98 to 115 ft (30 to 35 m)
115 ft (35 m)
115 ft (35 m)
115 ft (35 m)
Levelflex M FMP40
Measuring range
PA-coated
cable probes
—
16 to 50 ft (12.5 to 15 m)
—
— 50 to 82 ft (15 to 25 m)
⎯
82 to 98 ft (25 to 30 m)
82 to 98 ft (25 to 30 m)
115 ft (35 m)
115 ft (35 m)
Endress+Hauser