procedure for rockwell hardness test

{"title":"Load 60kgf Motorized Rockwell Hardness Testing Machine","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/16\/ab\/62ff642f4b60bea4f512358df4da-200x200-1.jpg","attrs":{"Price":"Negotation","Brand Name":"Hardruler","Model Number":"HR-150M","Minimum Order Quantity":"1","Certification":"CE","Place of Origin":"CHINA","Payment Terms":"T\/T, Western Union, MoneyGram","Supply Ability":"1000 set\/year","Packaging Details":"Standard exporting package","Resolution":"0.5HR","Preload":"10kg test load","Test loads":"60kgf(588.4N), 100kgf(980.7N), 150kgf(1471N)","Loading control":"Motorized","Dwell time":"2-60S"}}

{"title":"Digital Portable Superficial Rockwell Hardness Tester High Accuracy","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/5b\/68\/a90cbd258eb897ff3c3b16178532-200x200-1.jpg","attrs":{"Brand Name":"HUATEC","Model Number":"HR-150\/45H","Minimum Order Quantity":"1pcs","Delivery Time":"1-4days","Certification":"ISO, CE, GOST","Place of Origin":"Beijing","Payment Terms":"T\/T, Paypal, Western Union","Supply Ability":"500pcs per month","Packaging Details":"Standard export package","Digital Screen":"Touch screen","Advanced Technology":"Closed loop technology and displacement sensor technology","One key operation":"No dead weight, no need of installation and training","30 scales":"Test Rockwell, Superficial Rockwell 30 scales","Software":"Powerful data processing software","USB interface":"USB interface, test value can be stored by U disc at EXCEL file"}}