For tailored advice and product selection or configuration assistance, please contact a sales representative. 19 Industrial Instrumentation and Process Control > pH and Conductivity pH and Conductivity Process Learning System Critical Parameters of Liquids and Solutions These systems and their corresponding courses offer an introduction to measurement, control, and troubleshooting of pH and conductivity processes. Two Workstations The process workstation is the hub of the different processes to be investigated by learners. They install the appropriate instruments as described in the courses, which cover both the theory and practical learning activities. The instrumentation workstation houses the electrical unit, which powers the equipment, as well as other electrical equipment. A controller (sold separately) is required to have a fully functional system. The instrumentation workstation is equipped with wiring ducts to organize wires and features a handy pull-out work surface. Lockable, swiveling casters allow movement of the two workstations. A hitch mechanism links the workstations. Various optional components are available to customize the workstation. Main Learning Objectives – pH measurement, pH probes and smart transmitters – Titration of strong acids, weak acids, and buffer solutions – Feedback control and batch processes – PID control of a batch pH process – Feedback control of continuous pH processes – Conductivity measurement, probes and smart transmitters – Water deionization – Ion-exchange resins applications – Ion-exchange resins regeneration – On-off conductivity control Calibration Instrumentation A calibration device is an essential addition to allow calibration and maintenance of the transmitters, current-to-pressure converter, gauges, and control valves. Fault Insertion There are three different methods to insert faults: by accessing the component’s fault panel, by changing the calibration parameters of a device from the instructor’s computer, or by remotely modifying the state of I/O relays on a PLC from a computer or from a touch screen terminal. Recommended Learning Material Workbooks → Page 161 Campus license: Order no. 585124 Courses/User Guides on Festo LX aFamiliarization with the Training System - pH and conductivity aProcess Control (pH and Conductivity) aMeasurement (pH and Conductivity) Smart Devices A few components feature a transmitter that can communicate via the HART communication protocol, which enables communication between devices by superimposing digital signals on top of the existing 4-20 mA outputs. Most of these devices can be configured via their alphanumeric display and/or push-buttons, or via a HART software configurator (strongly suggested).
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