The Ohaus 7253-1W 3-Piece Cal-Pak Certified Calibration Weight Set is suited for use with Ohaus' range of Semi-Micro Balances. Instead of purchasing an entire set of calibration weights, the 7253-1W is designed to test the balance with only three weights to maintain the user's instrument for maximum accuracy and repeatability.

This set contains three high quality, precision weights that can be used with the Adventurer, Pioneer, and PR series of balances. The supplied weights offer the recommended calibration weight, 10% of the calibration weight, and the minimum weight as determined by the balance's readability and expected standard deviation under normal conditions as recommended by USP 41.

Repeatability, Accuracy, and Span Calibration

The 7253-1W is sized perfectly to meet various criteria.

Repeatability

The small weight is sized for less than 5% of the balance capacity for easy repeatability testing. Repeatability results are then used to calculate the minimum weight needed on the balance to meet a particular level of accuracy in a specific environment. This is used in various industries, including highly regulated applications.

Accuracy Testing

Performed with the larger weight and sized between 5% and maximum capacity of the balance, accuracy testing can be performed. This larger test load helps determine the systematic error.

Span Calibration

The larger weight can be used to periodically perform a span calibration on the balance. This is important to maintain high accuracy weighing when the environmental conditions change, such as temperature or humidity.

Traceability

The high-precision weights within the set are traceable to internationally recognized standards through an exact series of measurements that provide an accurate value for each weight with low uncertainty. Troemner's NVLAP (Lab Code 105013-0) certificate provides evidence that the process for the measurement traceability chain meets the stringent requirements of ISO/IEC 17025.

Calibration Consistency

The weights within this set have had every variable of the measurement process addressed in order to ensure consistency of calibration results.

Lowest Uncertainties

These weights provide users with achieving the highest measurement capabilities while offering the lowest measurement uncertainties. The true test of how well a calibration is performed is the reported uncertainty, which provides users with a higher level of confidence.

Alloy 8 Advantage

The alloy 8 stainless steel offers the finest grade of stainless steel available. Alloy 8 possesses closely controlled density, extremely low magnetic properties, good stability, and resistance to corrosion.