Jenway 6715 - Manual (Page 128)

110
Selecting Calibration Standards
Up to 20 calibration standards may be used to plot the calibration curve (with up to 5 replicates for
each). Select the
Number Of Standards key and enter the total number of standards to be used
(including the blank) via the numeric keypad. The value entered can be from 2 to 20. Depending on
the number entered the subsequent keys with values beyond the requirements will be greyed out.
If the Number of Standards is set to zero then it is possible to set a Factor using the numeric keypad
(the range if from –9999.99 to 9999.99). Touching each of the active keys below this enables the
values for each standard to be input. If working from a pre-defined calibration curve or table the
corresponding absorbance value for each standard can be entered as the result. If creating the curve
from a set of standards the
Results column will be re-populated with the measured absorbances once
the calibration curve has been created.
Selecting the Cal Std 1 key opens a numeric input window. Enter the value for the first standard (this
may be the blank). When completed a corresponding absorbance value can be entered in a similar
manner by selecting the
Result 1 key, if working from a pre-defined calibration curve.
Further standard (and absorbance values, if required) can be entered in a similar manner for all the
standards selected under
Number Of Standards.
Setting Curve Fit
The Curve Fit key scrolls through the available options – Interpolation, Interpolation through Zero,
Linear Regression, Regression through zero, Quadratic, Quadratic through zero, Cubic, Cubic through
zero. The selected curve fit can be changed on recalled results and with post measurement tools.