Sieve Calibration Samples.CSC (Card Security Code) A three- or four-digit number printed on the back of credit cards for security purposes. Called "Card Verification Value" (CVV) by Visa, "Card Validation Code" (CVC) by MasterCard and "Card Identification (CID) by American Express and Discover, Scientific has introduced a new line of calibration test spheres. Endecotts Calibration Samples are microspheres of soda-lime glass Soda-lime glass is the most prevalent type of glass. It can be processed so inexpensively that it is used for windowpanes and bottles. Soda-lime glass can be created by melting a mixture of silicon dioxide, sodium carbonate, and either calcium carbonate or calcium oxide. ranging from 3.35 mm-20 microns in size. The microspheres, which are calibrated cal·i·brate tr.v. cal·i·brat·ed, cal·i·brat·ing, cal·i·brates 1. To check, adjust, or determine by comparison with a standard (the graduations of a quantitative measuring instrument): to national and international standards, pass over the total surface of the sieve mesh, making the test extremely accurate up to 1 mm. |
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