Endress+Hauser Cerabar S Series - Page 34

Selecting pressure units The units for pressure is selected with the parameter "Select Pressure Unit". After
selecting new pressure units all information on the pressure are converted into the new
units.
Example: After selecting the units "psi" the measuring range from 0…10 bar is converted
in 0…145.5 psi.
Calibration without
reference pressure
A pressure for the bargraph zero and span is entered into the device. No particular
pressure must be acting.
# Parameter Entry Significance
1 Default Values 5140 Reset to factory
setting
2 Lower Range
Value
e.g. 0 Zero
3 Upper Range
Value
e.g. 100 Span
4 Measured
Value
e.g. 15.5 Measured value
in e.g. kPa
Calibration with
reference pressure
An acting reference pressure or process pressure corresponds exactly to the desired
bargraph zero and span.
# Parameter Entry Significance
1 Default Values 5140 Reset to factory
setting
2 The exact pressure for zero is acting
3 Set Lower
Value
Confirm Register zero
4 The exact pressure for span is acting
5 Set Upper
Value
Confirm Register span
6 Measured
Value
e.g. 15.5 Measured value
in e.g. kPa
Bias pressure
If the display (when present) does not display zero after calibration when the process
pressure p
e
= 0, then it can be corrected to zero by registering the bias pressure.
Entry of a bias pressure
# Parameter Entry Significance
1 Set Bias
Pressure
e.g. 0.1 Enter bias
pressure
Registration of an acting bias pressure
# Parameter Entry Significance
1 Bias Press
Autom
Confirm Register bias
pressure
Pressure output in % If it is desired that 0...100% pressure is output via Foundation Fieldbus, then the
parameter "Linearization" has to be set to "level linear". The zero and span of the
Foundation Fieldbus-Signal are automatically assigned the values 0% and 100%.
0...2 bar g
p
p
Bias
p+p
Bias
p
e
=0
BA211Y35
pipe full
0 - 10 bar0 - 10 bar
p
ref
BA211Y40
Reference
pressure must act
p
ref
5 Pressure Measurement Cerabar S FF
34 Endress+Hauser