Calibration Weights

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Calibration Weights and test weights are standardized masses certified by international, national, or industrial laboratories, such as NIST, ANSI, ASTM, or ISO. Each weight has a precise mass that makes it suitable for calibrating scales to ensure subsequent weight measurements are accurate. Documents often accompany calibration and test weights to guarantee they meet the standard body’s specifications for properties such as tolerance, material, surface finishing, design, cavities, and adjustments. Units of measurement are typically based on the kilogram, but other units are designated.

Calibration and test weights calibrate scales, balances, weight cells and other masses or weights. Weights are often accredited for certain applications, with those used in scientific settings held to higher benchmarks than those used for commercial or industrial uses, such as materials testing, material handling equipment load evaluation, pressure generation on deadweight testers, and cable testing.

ISO/IEC 17025: The International Organization for Standardization (ISO) is an independent non-governmental organization comprising a membership of 164 national standards bodies. The International Electrochemical Commission (IEC) is an international standards organization for electrotechnical fields. Together with other liaison organizations, they created the ISO/IEC 17025 standards. This is the international reference to be used by testing and calibration laboratories that want to display their ability to provide reliable results.