Standard procedures of demagnetization

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To effectively demagnetize a hysteresis brake and ensure it can be safely used, follow these step-by-step instructions:

Demagnetization Process

1. Safety Precautions: Before starting, ensure the hysteresis brake is powered off completely and has cooled down adequately to prevent any burns or damage.

2. Equipment Check: Verify that you have a suitable degaussing coil or demagnetizer appropriate for the size and type of hysteresis brake.

3. Positioning: Place the degaussing coil around the hysteresis brake, ensuring it is positioned as close as possible without making physical contact.

4. Power On: Turn on the degaussing coil as per the manufacturer’s instructions. Gradually increase the power to the level recommended by the manufacturer to initiate the demagnetization process.

5. Degaussing Procedure: Move the degaussing coil in a circular motion around the entire surface of the hysteresis brake. Ensure thorough coverage to evenly reduce the magnetic field strength.

6. Repeat if Necessary: Depending on the initial magnetization strength, you may need to repeat the demagnetization process several times. Each pass should progressively decrease the magnetic field until it reaches an acceptable level.

7. Power Off: Once demagnetization is complete, slowly power off the degaussing coil to avoid abrupt changes in magnetic field.

Verification Process

Gaussmeter Check: Use a gaussmeter or magnetic field strength meter to verify the effectiveness of the demagnetization. Place the gaussmeter probe near various points on the surface of the hysteresis brake and observe the readings.

Acceptable Levels: Confirm that the magnetic field strength readings are significantly reduced compared to pre-demotion levels. Ideally, the gaussmeter should show readings close to zero or minimal residual magnetism.

Operational Test: After verifying the magnetic field strength, conduct a test operation of the hysteresis brake in a controlled environment. Monitor its performance to ensure there are no unexpected magnetic interactions or abnormalities.

Documentation: Record the date of demagnetization, method used, gaussmeter readings before and after demagnetization, and operational test results. This documentation serves as a reference for future maintenance and quality control.

Final Checks: Inspect the hysteresis brake for any signs of overheating or physical damage that may have occurred during the demagnetization process. Ensure all connections are secure and components are intact.

By following these steps, you can effectively demagnetize a hysteresis brake and verify its readiness for normal operational use, ensuring optimal performance and safety.

In summary to demagnetization, please
1. Apply 100% current value
2. Rotate the shaft
3. Decrease the current from max to zero and keep rotating the shaft

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Valid Magnetics Hysteresis Brakes:
https://www.validmagnetics.com/component/jshopping/hysteresis-brakes.html