Technical Data; Additional Technical Data - Endress+Hauser Levelflex M FMP40 Operating Instructions Manual

Technical data

Measured variable
Output signal
Signal on alarm
Linearization
Reference operating
conditions
Resolution
Maximum measured error
Reaction time
74
10 Technical data
10.1

Additional technical data

10.1.1 Input
The measured variable is the distance between the reference point (see Fig. on → ä 16) and the
product surface.
The level is calculated taking into account the empty distance entered (E, see Fig. on → ä 84).
Alternatively, the level can be converted to other variables (volume, mass) by means of linearization
(32 points).
10.1.2 Output
• 4 to 20 mA with HART protocol
Failure information can be accessed via the following interfaces:
• Local display:
– Error symbol (→ ä 37)
– Plain-text display
• Current output, failsafe mode can be selected (e.g. according to NAMUR Recommendation
NE 43).
• Digital interface
The Levelflex M linearization function enables the measured value to be converted into any desired
length or volume units and mass or %. Linearization tables for volume calculation in cylindrical
tanks are preprogrammed. Any other tables with up to 32 value pairs can be input manually or semi-
automatically. The creation of a linearization table with FieldCare is particularly convenient.
10.1.3 Performance characteristics
• Temperature = +20 °C ±5 °C
• Pressure = 1013 mbar abs. ±20 mbar
• 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
• For interface measurement:
– Coax probe
– DK of the lower medium = 80 (water)
– DK of the upper medium = 2 (oil)
• Digital: 1 mm
• Analog: 0.03 % of the measuring range
Is in the Function group "Basic Setup" (00) as of → ä 48.
The reaction time depends on the configuration.
Shortest time:
• 2-wire electronics: 1 s
Levelflex M FMP40 with HART/4...20 mA
Endress+Hauser