1. First, prepare 3 calibration cotton samples and balance them at the test site for 4 hours. Pick out the impurities in each sample, tear off the cotton piece and weigh it10.00g. ..

2. Secondly, press the calibration key and the indicator light will light up. Weigh the sample standard cotton sample, loosely put the cotton sample silk into the sample barrel, cover the sample barrel cover, and tighten it clockwise until it cannot be twisted.

3. Then, press the test button and press the "add" or "subtract" key until the value is consistent with the standard sample, and then press the confirm key. Press the calibration key to exit the calibration and enter the test state.

4. Then, divide each sample into three parts with uniform thickness and test them one by one. The last calibration curve of the instrument replaced the previous calibration curve, and the last calibration curve was retained after shutdown. When the machine is restarted, the calibration curve is still used.

5. Finally, press the reset key in the calibration state, and the calibration curve will be completely cleared and restored to the standard Marconi curve.