On-Off control simulation for the 4 pH processes,.PID control simulation for the 4 pH processes,.MFA control simulation for the 4 pH processes using an MFA pH controller,.The software product is built in National Instruments' LabVIEW platform and includes: The Real-Time pH Process Modeling and Control Simulation Software is a useful tool for you to do pH process and pH control studies. Before designing and implementing a pH control system, it is wise to study and understand the pH process that you have so that proper solutions, equipment, and software can be acquired and installed.