Awareness Technology Stat Fax 4200 Operator's Manual page 51

Cut Off Mode (Continued)
COV Formula
Y * mean(PC) +F
X*mean(CC) + F
Stat Fax
• Use this equation if only a positive control is used
to determine the COV.
• For interpretation, you may choose either the
Regular Cut Off Mode (positive >= cutoff, negative
< cutoff), or the Reverse Cut Off Mode. With the
Reverse Cut Off option, the Samples with values
lower than the cut off are labeled as "positive". If
you choose this option, be careful to follow the <
and > signs in the prompts for entering cut offs
and ranges.
• COV = cut off value for positive or negative
interpretation
• X = a variable provided in the Assay Kit package
insert. NOTE: X will equal 1 if no value of variable
provided.
• mCC = the calculated mean of the absorbance
values of the cutoff controls when test is run
• Blanking is optional, dependent upon the Assay
Kit
• F = factor added to the mCC. If needed, this value
is provided in the Assay Kit package insert. If none
provided, use zero for the value of F.
• Positive and/or negative controls may be used for
QC criteria.
® 4200 Operator's Manual Doc. 4200 Rev. K
Explanation
47