test-1-GLO

Test 1

Test 1 (Element Measurement Correction Ratio) takes the calculated measurement adjustment and divides it by the raw measurement tolerance. If the result exceeds ±1.0, then the correction is greater than expected. This is likely to be caused by random error only 5% of the time.

Test1 is defined by the following formula.

Where:

Correction = the difference between the measured value and the reconciled measurement

rawtol = the tolerance for the measured value.

ArcErf = inverse normal error distribution function.

ZT = the number of standard deviations corresponding to the required level of confidence. For 95% level of confidence, ZT = 2.0.

T = the number of standard deviations for the instrument tolerance. You set this value in the Tolerance field of the Reconciliation Options dialog box.