Technical Data; 10.1 Technical Data At A Glance - Endress+Hauser Levelflex M FMP 40 Operating Instructions Manual

10 Technical data

90
10 Technical data

10.1 Technical data at a glance

Application
Measuring principle
Equipment architecture
Measured variable
Measuring range
Output signal
Signal on alarm
Electrical connection
Cable entry
Supply voltage
Power consumption
Levelflex M FMP 40 with PROFIBUS-PA
Application
The Levelflex M performs continuous level measurement of powdery to
granular bulk solids and liquids e.g. plastic granulate. Probes are available
with threaded process connections from ¾" and flanges from DN40 / 1½":
• Rope probes, above all for measurement in bulk solids, measuring range
up to 35 m/1378"
• Rod probes, above all for liquids
• Coax probes, for liquids
Function and system design
The Levelflex is a "downward-looking" measuring system that functions
according to the ToF method (ToF = Time of Flight). The distance from the
reference point (process connection of the measuring device see page 12)
to the product surface is measured. High-frequency pulses are injected to a
probe and led along the probe. The pulses are reflected by the product
surface, received by the electronic evaluation unit and converted into level
information.
This method is also known as TDR (Time Domain Reflectometry).
see page 101 ff.
Input
The measured variable is the distance between the reference point and the
product surface.
Subject to the input zero point empty distance the level is calculated.
Alternatively, the level can be converted by means of linearisation into other
variables (volume, mass).
see Technical Information TI 358F
Output
• PROFIBUS-PA
Error information can be accessed via the following interfaces:
• Local display:
– Error symbol (see page 36)
– Plain text display
• Digital interface
Auxiliary energy
• Housing F 12 with additionally sealed terminal compartment for standard
or EEx ia
see page 31 ff.
see page 31 ff.
min. 60 mW, max. 900 mW
Endress+Hauser