1. pH/mv potentiometer – This potentiometer enables adjustment of the slope of pH electrode by means of a calibration buffer.
2. Asymmetry potentiometer – It is used to adjust the zero mV point of the pH signal (pH 7.0).
3. Temperature potentiometer – A manual control to correct for temperature coefficient of pH electrode.
4. Set point potentiometer – It is used to set the mV or pH set point.
5. P-band potentiometer – It serves to adjust the width of the P-band amplification. A low P-band translates to strong amplification.