Endress+Hauser Levelflex M FMP40, Руководство по эксплуатации

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Technical data Levelflex M FMP40 with HART/4...20 mA
74 Hauser
10 Technical data
10.1 Additional technical data
10.1.1 Input
Measured variable 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
Output signal • 4 to 20 mA with HART protocol
Signal on alarm 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
Linearization 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
Reference operating
conditions • 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)
Resolution • Digital: 1 mm
• Analog: 0.03 % of the measuring range
Maximum measured error Is in the Function group "Basic Setup" (00) as of
→
ä
48.
Reaction time The reaction time depends on the configuration.
Shortest time:
• 2-wire electronics: 1 s