SHORE-A&O Durometer. How do I know its telling me truth ??Noway can you know if the cheap China-made device tells you correct numbers unless you do some verification works on the device, using LCD kitchen scales within 1 gramme accuracy.
WORKFLOW
• Place your durometer on the scales center plate sheer upright..
• Press down the upper knob slowly until the reading 50 on the frontal dial.
RESOLUTION:
-- if the weighing scales gives you reading 439 grammes with a variation ± 8 grammes, then your Shore unit is OK.
-- if not, it is a waste unusable.
Be happy.
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