Endress+Hauser Deltabar M PMD55 User Manual

Cerabar M, Deltabar M, Deltapilot M / 4...20 mA HART Commissioning
Endress+Hauser 57
6.5 Level measurement (Cerabar M and Deltapilot M)
6.5.1 Information on level measurement
!
Note!
You have a choice of two methods for calculating the level: "In pressure" and "In height". The table
in the "Overview of level measurement" section that follows provides you with an overview of these
two measuring tasks.
• The limit values are not checked, i.e. the values entered must be appropriate for the sensor and
the measuring task for the device to be able to measure correctly.
• Customer-specific units are not possible.
• There is no unit conversion.
• The values entered for "Empty calib./Full calib.", "Empty pressure/Full pressure", "Empty height/
Full height" and "Set LRV/Set URV" must be at least 1% apart. The value will be rejected, and a
warning message displayed, if the values are too close together.
6.5.2 Overview of level measurement
Measuring task Level
selection
Measured
variable selection
Description Measured value
display
Calibration is
performed by entering
two pressure-level
value pairs.
"In pressure" Via the "Output
unit" parameter: %,
level, volume or
mass units.
– Calibration with reference
pressure (wet calibration),
see  ä 58
– Calibration without
reference pressure (dry
calibration), see  ä 60
The measured value
display and the
"Level before lin"
parameter display the
measured value.
Calibration is
performed by entering
the density and two
height-level value
pairs.
"In height" – Calibration with reference
pressure (wet calibration),
see  ä 62
– Calibration without
reference pressure (dry
calibration), see  ä 64

Endress+Hauser Deltabar M PMD55 Specifications

General

Brand	Endress+Hauser
Model	Deltabar M PMD55
Category	Transmitter
Language	English