Control Valve Calibration with 4–20 mA Signal | Stroke Test & Hysteresis | BDG10503 Instrumentation

Описание: 🔧 BDG10503 Instrumentation – Control Valve Experiment

In this video, we demonstrate how a control valve responds to varying electrical input signals (4–20 mA) and measure the corresponding valve stroke length. This experiment focuses on observing the linear response and identifying hysteresis behavior during valve opening and closing cycles.

📍 What’s Inside:

🧪 Experiment Objectives:

Understand the configuration and working principle of a control valve system

Develop and test a functioning circuit for control valve operation

Measure stroke lengths at different current levels and analyze system performance

🛠️ Equipment Used:

Control Valve

VFD Control Panel

I/P Transducer

⚙️ Procedure Highlights:

Signal sent from 4 mA to 20 mA and back down

Stroke length measured at 0%, 25%, 50%, 75%, and 100%

Comparison of rising and falling stroke values to identify hysteresis

Safety protocols followed strictly throughout the testing process

📊 Key Observations:

The valve shows a nearly linear response during opening

Slight hysteresis observed on the closing cycle

Importance of calibration highlighted for maintaining control accuracy

🎯 Conclusion:
This experiment successfully demonstrates how control valves behave under different current inputs, reinforcing the importance of calibration and maintenance in industrial flow control systems.

Presented by Group 1, Section 1
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