Stat Fax 303 Plus, Руководство оператора

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Awareness Technology, Inc. Stat Fax 303 Plus Operator’s Manual Rev. J 25
After these values are entered into the equation, the instrument prompts “Equiv Range Y/N” . If
you answer YES, you will be able to enter an equivocal range based on factors of the cutoff
value. The instrument will prompt
“Neg < X*COV; X= ” . Enter a number which, when
multiplied by the cutoff value, will be the upper limit of the Negative range (enter 1 if you want
Negative values to be all values less than the cutoff value). The display will then prompt
“Pos
>= X*COV: X= ” . Enter a number which, when multiplied by the cutoff value, will be the lower
limit of the Positive range (enter 1 if you want Positive values to be all values greater than or
equal to the cutoff value). Any samples with absorbances falling between these ranges will be
labeled “E” (equivocal).
The display will show: “Num. of NCs =” . Type in the number of Negative Controls and press
ENTER.
If you select 2 or more wells for each control the display will prompt “Check mean Y/N” . Press
NO if the criteria apply to the individual wells or YES if the criteria apply to the mean of the wells
The display will show “ mNeg C. <=”, “mNeg C. >=” . Type in each value and press ENTER.
The display will show “ Num. of PCs=” . Type in the number of Positive Controls and press
ENTER.
The display will show “ Pos C. >=”, Pos C<=” . Type in each value and press ENTER.
The total number of controls, plus the blank, must be less than or equal to 8. If more are
entered,
“Too many controls” and “TEST ENDED” will be printed, and the mode will
automatically cancel.
“Set Carrier to X” , “Then Press Enter” is displayed, where X is either 1 or A, depending on the
strip type. In Cutoff Mode, you may not select additional Controls or Cutoffs. Load the first strip
into the right-most carrier position and press ENTER. While the strip is being automatically
positioned for reading, the display will indicate
“Positioning Strp” .
The instrument reads the strip and prints the results. Four columns are printed.
“Well” tells which well the reading is from.
“Abs” prints the absorbance reading.
“Index” prints the ratio of the sample to the positive interpretation cutoff.
“I” prints sample interpretations:
N - indicates a negative reading,
P - indicates a positive reading, or
E - indicates an equivocal reading
Error messages will also print in the Interpretation column:
H - indicates that the blank or the individual control exceeded the limit entered.
L - indicates that the individual control was lower than the limit entered.