9.2.2.3 Set lower range value/upper range value (without pressure available)
Introduction
The lower range value (4 mA) corresponds to 0% of the measuring range. The upper range
value (20 mA) corresponds to 100% of the measuring range.
Without pressure
available, you have the following options for assigning the desired pressure
measurements to the lower range value and the upper range value:
Device without display Device with display Remote operation
Set lower range value - "Lower range value" pa‐
rameter [02]
Settings > Current out‐
put >
Lower range value
Set upper range value - "Upper range value" pa‐
rameter [03]
Settings > Current out‐
put >
Upper range value
The minimum permissible measuring span of the measuring cell must not be fallen below. You
can find the minimum permissible measuring span of your measuring cell in the section
Technical data (Page 199)
Requirement
●
No pressure is present.
● You have a device with display.
Procedure
1. Navigate to the parameter view.
Navigating in the views (Page 76)
2. In the parameter view, set the "Lower range value" parameter [02].
3. Press the
button.
4. Enter a value within the measuring limits with the and buttons.
5. Use the button to confirm.
The lower
range value is set. Note that the upper range value does not move automatically.
6. Navigate to the "Set upper range value" parameter [03].
7. Press the
button.
8. Enter a value within the measuring limits with the and buttons.
9. Use the button to confirm.
The upper range value is set.
Result
You have set your measuring range.
● If the
minimum permissible measuring span is fallen below, the message "FAILD" appears.
Parameter assignment
9.2 Parameter assignment over device with display
SITRANS P320/P420 with 4 to 20 mA/HART
Operating Instructions, 11/2019, A5E44852162-AC 109
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