3. Press the button.
The value "0" appears on the display and the "EDIT" symbol flashes.
4. Enter the known reference pressure using the or buttons.
5. Confirm the value by pressing the button.
6. Change to the measurement view with the button.
Result
The device displays pressure measurement 0 in the set unit.
Depending on the set damping, the settling time is extended until the pressure measurement
0 is displayed.
Note
For devices for absolute pressure, the lower range value is at vacuum (0 bar a).
The zero point adjustment for devices for absolute pressure that do not measure absolute
pressure (0 bar a) leads to incorrect settings.
9.2.7
Apply lower range value [08]/Apply upper range value [09]
9.2.7.1
Apply lower range value parameter [08]
Sets the lower range value to the current reference pressure.
Setting range:
Within the measuring limits
Factory setting:
See nameplate (depending on measuring cell)
9.2.7.2
Apply upper range value parameter [09]
Sets the upper range value to the current reference pressure.
Setting range:
Within the measuring limits
Factory setting:
See nameplate (depending on measuring cell)
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.
Parameter assignment
9.2 Parameter assignment over device with display
SITRANS P320/P420 with 4 to 20 mA/HART
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Operating Instructions, 11/2019, A5E44852162-AC