Sl Analytics UviLine Sl 5000 Gebrauchsanleitung Seite 145

Concentration mode 147
6.4.1.2 Calibration curve displaying
After confirmation of the value measured with F4 key [Next] the calibration curve is displayed.
F1 key [Back]
It allows to the user, in the event of error, to return back to the analysis programming and to modify the a
quiring way of the values to make the curve (standards measurement, use of the curve equation or entry
of the Concentration/absorbance couples).That also enables him to change the standards concentration.
F2 key [Curve type]
It allows changing the curve calculation mode.
Polygon line
The straight line calibration curve is consisted of line segments connecting the calibration points between
them.
Straight line (linear regression)
Curve whose equation is form ax + B.
Parabola (quadratic regression)
Curve which equation is: ax² + bx + c.
- Select the type of curve with « ▲ » and « ▼ » keys and confirm with <START ENTER> key.
The software will redraw the curve taking in account of the new calculation mode.
The equation of the calculated curve is displayed as well as the coefficient of R² determination
F3 key [Meas.range]
It allows to the operator to reduce the parameter measuring range.
Lower limit entered by the operator Upper limit entered by the operator