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

Operation
6.5 Local operation
Adjusting zero point without digital display
You have a device with a cover without an inspection window and do not want to set the zero
point, but rather adjust it.
An ammeter is required to do this.
To adjust the output current of the zero point, proceed as follows:
1. Connect the ammeter to the test connector.
2. Create the reference pressure.
3. Adjust the output current of the zero point with <UP> or <DOWN> key.
4. When you release the key, the device automatically saves the value.
See also
Operating via keys (Page 6-12)
6.5.4.3

Setting/adjusting limit point

Introduction
The zero point for the pressure transmitter can be set or adjusted in mode 3.
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 limit point and lies within
the permitted deviation.
The transmitter is using the "Pressure" measurement type.
Setting limit point
To set the output current of the limit point to 20 mA, proceed as follows:
1. Create the reference pressure.
2. Set mode 3.
3. Set the limit point to 20 mA.
4. Save with the <Mode> key.
Adjusting limit point
If you do not set the output current, but continually adjust it, you must mathematically
calculate the currents to be adjusted.
6-18
SITRANS P300 with HART communication
Operating Instructions, 06/2005, A5E00359579-02