Endress+Hauser Cerabar M - 8.4 Level Measurement (Cerabar M and Deltapilot M)

Commissioning with an operating menu (onsite display/FieldCare) Cerabar M, Deltabar M, Deltapilot M
74 Endress+Hauser
8.4 Level measurement (Cerabar M and Deltapilot M)
8.4.1 Information on level measurement
• 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. (028)/Full calib. (031)", "Empty pressure (029)/Full
pressure (032)", "Empty height (030)/Full height (033)" must be at least 1 % apart. The
value will be rejected, and a warning message displayed, if the values are too close
together.
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.
8.4.2 Overview of level measurement
Measuring task Level
selection
Measured
variable options
Description Measured value
display
Calibration is
performed by
entering two
pressure-level value
pairs.
"In pressure" Via the "Unit
before lin. (025)"
parameter: %,
level, volume or
mass units.
–Calibration with
reference pressure (wet
calibration), see  ä 75
– Calibration without
reference pressure (dry
calibration), see  ä 77
The measured value
display and the
"Level before lin. (019)"
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 81
– Calibration without
reference pressure (dry
calibration), see  ä 79