Student Operating Chart Recorder in Electronics Laboratory, San Francisco State College

What the devices are:

1. Strip Chart Recorder (foreground)

• This is the wide device with paper threading across it.

• A strip chart recorder creates a continuous ink trace on paper, recording voltage changes over time.

• It functions like an oscilloscope but with permanent paper output.

• Used for:

  • Tracking sensor responses

  • Logging signal data

  • Observing control system stability or slow-changing variables

2. Analog Simulator Rack (background)

• A patch-panel simulator unit.

• The spaghetti of wires, modular knobs, and meters are part of a system designed to model real-world physical phenomena using analog signals:

  • Servo motor behavior

  • Thermal systems

  • Dynamic responses to input voltage

3. Panel Meters and Dial Controls

• Below the patching zone is the signal output and parameter adjustment interface.

• The man is using these dials to fine-tune output or perhaps calibrate for a test run.

What the person is doing:

He’s likely:

• Adjusting the signal output or input variables in the simulator rack

• Monitoring system behavior as it gets recorded on the chart

• Possibly running an experiment on stability, error feedback, or oscillation

Educational context:

This would be part of:

• A control systems course

• An analog modeling lab