Cerabar M, Deltabar M, Deltapilot M / 4...20 mA HART Commissioning
Endress+Hauser 53
6.2.2 Level measuring mode
The following functions are possible by means of the keys on the electronic insert:
• Position adjustment (zero point correction)
• Setting the lower and upper pressure value and assigning to the lower and upper level value
• Device reset ä 50
!
Note!
•The "Zero" and "Span" keys only have a function with the following setting:
– "Level selection" = "In pressure", "Calibration mode" = "Wet"
The keys have no function in other settings.
• The device is configured for the "Pressure" measuring mode as standard. You can switch
measuring modes by means of the "Measuring mode" parameter. ä 55, "Measuring mode
selection"
The following parameters are set to the following values at the factory:
– "Level selection" = "In pressure"
– "Calibration mode": wet
– "Output unit": %
– "Empty calib.": 0.0
– "Full calib.": 100.0
– "Set LRV": 0.0 (corresponds to 4 mA value)
– "Set URV": 100.0 (corresponds to 20 mA value)
• Operation must be unlocked. ä 49, "Locking/unlocking operation".
• The pressure applied must be within the nominal pressure limits of the sensor. See information
on the nameplate.
Carrying out position
adjustment.
1
1) Observe warning on commissioning ( ä 51)
Setting lower pressure value. Setting upper pressure value.
Pressure is present at device. Desired pressure for lower pressure
value ("empty pressure") is present at
device.
Desired pressure for upper pressure
value ("full pressure") is present at
device.
Press the "Zero" and "Span" keys
simultaneously for at least 3 s.
Press the "Zero" key for at least 3 s. Press the "Span" key for at least 3 s.
Does the LED on the electronic insert
light up briefly?
Does the LED on the electronic insert
light up briefly?
Does the LED on the electronic insert
light up briefly?
Yes No Yes No Yes No
Applied pressure
for position
adjustment has
been accepted.
Applied pressure
for position
adjustment has
not been
accepted.
Observe the input
limits.
The pressure
present was saved
as the lower
pressure value
("empty
pressure") and
assigned to the
lower level value
("empty
calibration").
The pressure
present was not
saved as the
lower pressure
value. Observe
the input limits.
The pressure
present was saved
as the upper
pressure value
("full pressure")
and assigned to
the upper level
value ("full
calibration").
The pressure
present was not
saved as the
upper pressure
value. Observe
the input limits.
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