Yo-yo Balls Tester is to measure the initial length and elastic constant of the Yo-Yo ball. Includes steel ruler, measurement and graduated scale and weights.

Product Information
It is to measure the initial length and elastic constant of the Yo-Yo ball. Includes steel ruler, measurement
and graduated scale and weights.
Apply a mass (including the mass of the free clamping device) of (0,1 ± 0,005) kg to the free clamping device parallel to the axis of the tether made of elastic material and measure the distance L1 between the two clamps in millimeters to an accuracy of ± 1 mm.
Remove the force and allow the tether made of elastic material to relax to its approximate original length.
Apply a mass (including the mass of the free clamping device) of (0,2 ± 0,005) kg to the free clamping device.
Measure the distance L2 between the two clamps in millimeters to an accuracy of ± 1 mm.
Interface display: rotating speed, length, start/stop/reset. (digital display, page display the speed and length);
Technical
Length measuring system, DC motor with speed adjustment, intelligent MCU control.
Wall fixing support or floor stand seat£¨adjustable£© 
Encoder and intelligent control signal transmission system 
Rotating speed:1-150£¨adjustable£©   
Stroke£º0-1000MM£¨adjustable£© 
Dimension:400*1000*1400
Weight:80kg
Testing Standards
ASTM963-08 BS EN71-1 2011

http://www.lab-testequipment.com/Yoyo-Balls-Tester.html

Skyline Instruments CO.,LTD

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