4500 Series pH/Redox Transmitter P.I. Controller Supplement

This supplement provides additional instructions for the P.I. (Proportional-Integral) control features added to the Models 4535 and 4545 microprocessor-based pH/Redox transmitters. It covers relay output (time proportioning or pulse frequency) and analogue output control modes, including alarm setpoints, retransmission outputs, and setup procedures.