9.2.6 Zero point adjustment [07]
Introduction
A series of factors, such as installation, static pressure, temperature or long-term stability, can
cause zero-point errors.
The following options are available to correct zero-point errors:
Device without display Device with display Remote operation
Press the button and hold for
3 seconds.
"Zero point adjustment" parame‐
ter
Device > Zero point adjustment
For special applications (e.g. level measurement for a closed vessel), you have the option of
shifting the zero point to a desired pressure value using the "Zero point adjustment" parameter.
You proceed differently depending on the device version.
9.2.6.1 Adjusting zero point (gauge pressure)
Requirement
The pressure measurement is stable.
Procedure
1. Vent the pressure connection of the device.
2. Navigate into the parameter view.
Navigating in the views (Page 71)
3. In the parameter view, select the "Zero point adjustment" parameter [07].
4. Press the button.
5. Set the zero point to 0.
6. Change to the measurement view with the button.
Note
Depending on the damping setting, a settling time elapses until the pressure measurement 0
appears in the measurement view.
● For this reason, vent the pressure connection of the device up to the end of the operation.
Parameter assignment
9.2 Parameter assignment over device with display
SITRANS P320/P420 (mA/HART)
116 Operating Instructions, 06/2018, A5E44852162-AA
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