Setting/Adjusting Zero Point - Siemens SITRANS P300 Operating Instructions Manual

6.5.4.2

Setting/adjusting zero point

Introduction
The zero point for the pressure transmitter can be set or adjusted in mode 2.
Both the zero point and limit point can be adjusted separately or both values successively.
Requirement
You are familiar with the correct operation of the transmitter and the associated safety
information.
You have selected a reference pressure which corresponds to the zero point and lies within
the permitted deviation.
The transmitter is using the "Pressure" measurement type.
Setting zero point
To set the output current of the zero point to 4 mA, proceed as follows:
1. Create the reference pressure.
2. Set mode 2.
3. Set the zero point to 4 mA.
4. Save with the <Mode> key.
Adjusting zero point
If you do not set the output current, but continually adjust it, you must mathematically
calculate the currents to be adjusted.
To adjust the output current of the zero point, proceed as follows:
1. Create the reference pressure.
2. Set mode 2.
3. Adjust the output current of the zero point to the calculated value.
4. Save with the <Mode> key.
Setting zero point without digital display
You have a device with a cover without an inspection window and want to set the zero point.
To set the output current of the zero point to 4 mA, proceed as follows:
1. Create the reference pressure.
2. Press the keys <UP> and <DOWN> simultaneously.
3. When you release the keys, the device automatically saves the adjusted value.
SITRANS P300 with HART communication
Operating Instructions, 06/2005, A5E00359579-02
The device has set the zero point to 4 mA.
Operation
6.5 Local operation
6-17