Stat Fax 303 Plus, Руководство оператора

Страница: 24 / 52

20 Stat Fax 303 Plus Operator’s Manual Rev. J Awareness Technology, Inc.
2.1.7 Unit Codes
16 units of measurement designations, plus a blank selection (no unit label) are provided for
labeling the concentration column:
0 Conc 8 EV
1 AU/mL 9 U/mL
2 Ratio 10 A/mL
3 IU/mL 11 ppm
4 uIU/mL 12 ppb
5 % CAL 13 Abs
6 GPL/mL 14 Index
7 MPL/mL 15
When the display prompts “Select Units Y/N” , select YES to choose a unit designation. The
display will then prompt “Key unit code #” . To print the list of units, press 9,9, ENTER. To
choose a unit of measurement, select the numerical designation and press ENTER. The
selected unit will be displayed along with
“Y/N” . If the displayed unit is correct, press YES. If the
unit selected is incorrect, press NO to return to the previous prompt. If no unit labeling is desired,
select 15, ENTER.
2.1.8 Selecting Cutoff Interpretations
Samples may be labeled as Positive, Equivocal, or Negative, according to operator-entered
criteria. The criteria used are either a single upper cutoff or both an upper and lower cutoff.
When a single upper cutoff is used, any concentration which is equal to or greater than the cutoff
will be labeled as positive. The letters “P” and “N” are shown in the right-most column of the
printout to designate these interpretations. If an upper and a lower cutoff are both used, then the
concentrations which are greater than or equal to the upper cutoff are still labeled as positive,
but only concentrations less than the lower cutoff are labeled as negative. All other
concentrations are labeled “E” for equivocal.
To make cutoff selections: Whenever “Set Carrier” is displayed, you may press the INTRP key.
(There are three exceptions: absorbance mode, cutoff mode and cutoff control mode) You will
see
“Pos > = ” in the display. Type in the upper cutoff, then press the ENTER key. Next, the
instrument will display “Neg < ” . If you do not need a lower cutoff, press the ENTER key to
bypass this step. Otherwise, enter the value of the lower cutoff and press ENTER. The cutoff(s)
will be printed. Check the printout to see that they are correct before proceeding.
In Point to Point and Multipoint % Abs modes, you may also choose to flag samples having
absorbance values higher than the highest calibrator or lower than the lowest calibrator.