RT 455 PH Value Control Didactic Equipment Vocational Education Equipment Process Control Trainer
pH value controlled system based on standard industrial components, smart pH sensors, system control via PLC Features - digital control of the pH value via PLC - integrated touch screen or PC with software as HMI - network capable software with data acquisition for remote learning - use of smart sensors: sensor calibration via PLC, additional transfer of parameters Learning objectives/experiments - design and function of a pH control system - investigate the properties of open and closed loops - investigate disturbance and reference variable response - manipulating variable limitation and effect on the control system - fault finding (fault simulation via PLC) - familiarisation with industrial control engineering components: Siemens PLC as digital controller, smart pH sensor as measuring element, metering pump as actuator - familiarisation with Modbus for connecting smart sensors -- open standard -- quick data exchange -- additional transfer of parameters Specification [1] pH control process with standard industrial components and smart sensors [2] digital control via PLC, controller can be parametrised as P, PI, or PID controller [3] controlled system: corrosion-resistant pipe section [4] measuring element: smart pH sensor in transparent measuring tank with overflow [5] second smart pH sensor for displaying the pH value after the alkaline solution is added [6] smart pH sensors configured and calibrated via PLC [7] accessories for pH sensors and for manual pH measurement in the product tank are included [8] actuator: metering pump for acid [9] generate disturbance variables via metering pump for alkaline solution or continuous solenoid valve in the inlet [10] remote learning: follow and analyse experiments at any number of workstations with LAN/WLAN connection via network capable software [11] software for data acquisition via LAN under Windows 10 [12] multimedia instructional materials online in Media Center Technical data Pipe section: stainless steel PLC - type: Siemens SIMATIC S7-1200 - modules: compact CPU (8 DI, 6 DO, 2 AI), communication board, analogue output module (4 AO) 2 smart pH sensors - with glass shaft and PTFE diaphragm - integrated Pt1000 - interface: RS-485 Modbus Metering pumps - max. flow rate: 2,3L/h each - max. head: 160m each Product tank: 20L Chemicals tanks (HCl, NaOH): 2x 5L Measuring ranges flow rate: 2...25L/h pH value: 2x 0...12 (short-term 14) 230V, 50Hz, 1 phase; 230V, 60Hz, 1 phase 120V, 60Hz, 1 phase; UL/CSA optional LxWxH: 2030x790x1987mm Weight: approx. 259kg
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