Definition To determine the difference between the reading to the correct value

THE MEANING OF CALIBRATION

Definition

To determine the difference between the reading to the correct value.

THE IMPORTANCE OF CALIBRATION Corresponding to a standard of measurement Due to the change of scales and weights.

To be able confirm the accuracy of the measurements.

-Know the limits tolerances of the measurement results or not. - A few percent certainty that the measurement results. The tolerances in scope.

- There is a reference or not. - Confirm it possible that the accurate suitable for work

The Preparation of quality system

WEIGHTS

STANDARD OF MEASUREMENT OF MASS.

OIML (International Organization of Legal Metrology)OIML R111 divided by weight into Class E1, E2, F1, F2, M1, M2, M3.

By technical specifications of the weights. Shape Material Magnetism Surface condition The error of weights (Error).

(MATERIAL) Stainless Steel Class E1 • Brass Class F1 Recommend F2 • Steel Class M1 Recommend M2

SHAPE One piece

WITH ADJUSTMENT

SHEET AND WIRE

THE SELECTION OF WEIGHTS TO SUIT THE WORK.

From the ISO 10012, we have to choose Tum weight Not more than the tolerances. 1 in 10 of tolerance, but tolerance is deferred to. Up to a maximum of 1 in 3.

For example, if we want to calibrate weights 100 g by the coordinates.

Error does not exceed ± 0.15 mg, so the weight of the calibration standard.

To deviate by no more than 1/3 of 0.15 mg, equivalent to 0.05 mg.

CLASS OF CALIBRATION

ATTENDANCE Do not touch the weights with bare

hands.

ATTENDANCE Cleaned using a soft brush dusting

particles.

Keep weights In clean area environment and a constant

ATTENDANCE Do not place the weights on the floor

directly or place the weights stacked

ATTENDANCE Keep weights knocked crash or dragging

to the weighing pan.