pH Value Control Trainer

Digital controller, parameterisable as a P, PI or PID controller
2 pH value sensors in transparent measuring tanks with overflow
Product tank and 2 chemicals tanks
Trainer for control engineering experiments
pH value control process, equipped with standard industrial components
Water connection with control valve and rotameter
Corrosion-resistant piping system
Hand-held pH-meter for product control
Neutralisation of a caustic solution with an acid
2 metering pumps: adjustable manually or via controller
Process variables X and Y accessible as analogue signals via lab jacks
2-channel line recorder.

Chemicals tank: 2x 5L
Product tank: 20L
pH value sensor
With glass shaft and PTFE diaphragm
Filled with solid electrolyte
Metering pumps
Max. head: each 160mv
Max. flow rate: each 2,1L/h
Controller
Process variables X, Y as analogue signals: 4...20mA
Line recorder
2x 4...20mA
Feed rate 0...7200mm/h, stepped
Measuring ranges
Temperature: 0...80°C
pH value: 1...12.