Technical Data; Additional Technical Data - Endress+Hauser Levelflex M FMP41C Operating Instructions Manual

Levelflex M FMP41C PROFIBUS PA
Measured variable
Output signal
Signal on alarm
Linearization
Reference operating
conditions
Maximum measured error
Resolution
Reaction time
Influence of ambiente
temperature
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Technical data

10.1

Additional technical data

10.1.1 Input
The measured variable is the distance between a reference point (see Fig., → ä 12) and the product
surface. Subject to the input empty distance "E" (see Fig., → ä 49), the level is calculated.
Alternatively, the level can be converted by means of linearisation (32 points) into other variables
(volume, mass).
10.1.2 Output
• PROFIBUS PA:
– signal coding: Manchester Bus Powered (MBP)
– data transmission rate: 31.25 KBit/s, voltage mode
Error information can be accessed via the following interfaces:
• Local display:
– Error symbol (→ ä 28)
– Plain text display
• Current output, signal on error can be selected (e.g. according to NAMUR recommendation NE43)
• Digital interface
The linearization function of the Levelflex M allows the conversion of the measured value into any
unit of length or volume and mass or %. Linearization tables for volume calculation in cylindrical
tanks are preprogrammed. Any other tables from up to 32 value pairs can be entered manually or
semi-automatically. The creation of a linearization table with FieldCare is particularly convenient.
10.1.3 Performance characteristics
• temperature = +20 °C (68 °F) ±5 °C (9 °F)
• pressure = 1013 mbar abs. (14.7 psia) ±20 mbar (0.3 psi)
• humidity = 65 % ±20 %
• Reflection factor ≥ 0.8 (surface of the water for coax probe, metal plate for rod and rope probe
with min. 1 m ∅)
• Flange for rod or rope probe ≥ 30 cm ∅
• Distance to obstructions ≥ 1 m
Is in Function group "basic setup" (00), → ä 51.
Digital: 1mm
The reaction time is dependent on the configuration.
Shortest time:
• 2-wire electronics: 1 s
The measurements are carried out in accordance with EN 61298-3:
• digital output:
– average T : 0.6 mm/10 K, max. ±3.5 mm over the entire temperature range -40 °C to +80 °C
K
Technical data
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