test-3-GLO

Test 3

Test 3 (Element Imbalance Ratio) divides the balance error by the balance variance. Use it to identify significant mass imbalances. If the result exceeds ±1.0, then the out-of-balance condition is greater than expected. This is likely to be caused by random error only 5% of the time.

For a process, balance constraint is defined by the following formula.

Where:

balerr = imbalance in measured data.

balvar = balance variance.

T = number of standard deviations for the instrument tolerance.

ArcErf = inverse normal error distribution function.

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