Blind Adjusting Limit Point; Zero Point Calibration - Siemens SITRANS P300 Operating Instructions Manual

6.5.6.5

Blind adjusting limit point

Introduction
With blind adjustment, you adjust the pressure value of the limit point continually and without
reference pressure.
Note
Changes to modes 5 and 6 effect the pressure scaling only. The scaling for level or user-
specific characteristic curve remains unaffected by it. Therefore only pressure measured
values and pressure units are displayed in these modes.
It is possible to switch between rising and falling characteristic curves by interchanging the
values for zero and limit points.
Requirement
You are familiar with the correct operation of the transmitter and the associated safety
information.
There is no reference pressure and you have selected a pressure unit.
Procedure
To blind adjust the pressure value of the limit point, proceed as follows:
1. Set mode 6.
2. Adjust the pressure value of the limit point.
3. Save with the <MODE> key.
See also
Operating via keys (Page 6-12)
6.5.7

Zero point calibration

Introduction
The zero point is calibrated in mode 7. Zero point calibration corrects zero point errors
resulting from the installation position of the pressure transmitter. The device type
determines the way in which you proceed.
SIMATIC PDM or the HART Communicator will display the total of all zero point corrections.
SITRANS P300 with HART communication
Operating Instructions, 06/2005, A5E00359579-02
Operation
6.5 Local operation
6-25