1. Before zero drift, tune the range to the required value.

2. According to the lower limit value of the measurement， conduct zero shift， input the corresponding pressure to the lower value, adjust the potentiometer adjustment in order to make the output be 4 MA. 

3. Review the full range, if necessary, carry on the fine tuning. 

4. If the shift amount is larger, then it is firstly required to switch the shift switch ( connector) of the transmitter to the positive shift and negative shift position (determined by the shift direction), and then plus the measured lower limit pressure, tune the output to 4MA using the zero adjustment potentiometer. 

5. Repeat step 3.