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9.2.7.3
Apply lower range value/upper range value (with pressure present)
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.
With pressure present, 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
Apply lower range value Hold down the button
for 3 seconds.
"Apply lower range val‐
ue" parameter [08]
"Device > Apply values"
menu
Apply upper range value Hold down the button
for 3 seconds.
"Apply upper range val‐
ue" parameter [09]
"Device > Apply values"
menu
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
Example: Measuring cell 0 to 16 bar
1. The measuring range is from 0 to 16 bar.
S>EDU@
,>P$@
2. You set the lower range value from 0 bar to 1 bar.
In order for the measuring span to stay constant, the upper range value is automatically
shifted from 16 bar to 17 bar.
S>EDU@
,>P$@
3. You set the upper range value from 17 bar to 15 bar.
S>EDU@
,>P$@
The measuring span is 14 bar.
Requirement
● A pressure is applied, e.g. the device is already mounted.
● The pressure is within the measuring limits.
Parameter assignment
9.2 Parameter assignment over device with display
SITRANS P320/P420 (mA/HART)
Operating Instructions, 06/2018, A5E44852162-AA
119