Custom Units" Parameter; Set Customized Characteristic Curve - Siemens SITRANS P Operating Instructions Manual

Parameter assignment
9.3 Parameter assignment over remote operation
Upper scaling point:
x values:
y values:
9.3.5.2

"Custom units" parameter

Selects a custom unit.
The selected unit is displayed in the measurement view (Page 77).
Setting range:
Factory setting:
This parameter is only visible when you have selected a custom characteristic curve using the
"Application" parameter.
9.3.5.3

Set customized characteristic curve

Requirement
● You have set the "Customized characteristic curve" application.
● You have set a custom unit.
● You have set the lower scaling point and the upper scaling point.
Procedure
1. Select the "Customized characteristic curve" menu.
2. Read the data from the device.
3. Enter the desired number of breakpoints.
You can enter a minimum of two and up to 32 breakpoints.
4. Enter the x values and y values.
Note
The x values must increase monotonically. Otherwise, the x values are not accepted by the
device.
The characteristic curve is displayed as diagram.
The x values are shown as pressure value or as percentage of the set pressure range.
The y values are displayed in the user-specific unit or as a percentage of the configured
user-specific range.
5. Transfer the characteristic to the device.
Result
The output current now follows the set characteristic.
Values below the first breakpoint or above the last breakpoint are extrapolated.
150
250 cans
0%, 25%, 50%, 75%, 100%
0%, 25%, 50%, 75%, 100%
Up to 12 characters
0 or as specified in order
SITRANS P320/P420 with 4 to 20 mA/HART
Operating Instructions, 11/2019, A5E44852162-AC