The PID Control Trainer, Model PID-1 is a stand-alone instrument, consisting of, a Microprocessor as a controller. PID control allows changing the Proportional, Integral, Derivative bands. Simulated output having different inertia in the form of time constant elements are available as simulated loads. A simulated load with RC combination is used to create load conditions. The values of R and C can be changed, by a selector switch to change to different time constants of the simulated load.

This load replaces actual instrument or transducer, which is supposed to act as load with variable time response system, for the controller. A Disturbance Generator (reset mechanism) is used to instantaneously change the state of process variable. Adjustable damping control is provided to change the rate-of decay of process variable.

The state of change of controlling Set Point (SP) which is the input to the controller and monitoring controlled Process Variable (PV) outputs can be observed, on two independent input and output terminals respectively. An external recorder when connected to the output terminals, the recorder draws the input/output response for a step change. An optional external dual trace 15Mhz oscilloscope is used to display the controlling and controlled output waveforms. By using an optional external XY recorder, the waveforms can also be printed.

The following PID waveform can be observed at the output terminals of the controller using an optional Oscilloscope, or hardcopy of this can be obtained on a recorder.

Specifications:

• Microprocessor MPT-85 Based.
  
• Simulated RC Load: 1set.
  
• Disturbance Simulator Switch: 1 No.
  
• Damping control using a Potentiometer: 1No.
  
• Provision to measure controlling input and controlled output, on different terminals.
  
• Voltmeter monitors either the process variable or control variable by switch selection.