What are the points to note when operating the Martindale Abrasion Tester?

What are the points to note when operating the Martindale Abrasion Tester?1. Abrasion cloths cannot be used repeatedly and need to be replaced every 50,000 rubs;2. The wool felt can be used repeatedly until the surface is worn or stained before replacement;3. The insole should be de-clothed first and then tested for Martindale abrasion resistance;4、When using the Martindale Abrasion Tester, it must be connected to a power supply that matches its rated power to avoid damage to the Martindale Abrasion Tester during use.    Everything You Need to Know About Martindale Abrasion Tester (standard-groups.com)