Andor Technology iKon-L - Data Are Non-Monotonic

CALIBRATION
iKon-L SECTION 8
Page 139
8.2.2.2 - Data are Non-Monotonic
Your data may be Non-Monotonic if you have entered an incorrect value for one or more points on your data
trace. An instance of grossly inaccurate manual calibration is shown here:
From Pixel 706 to Pixel 953 the user has indicated a fall in wavelength, despite the preceding rise in pixel 690.
In such a case, an illegal non-monotonic calibration (as shown on the graph below) results.
The squares indicate points entered by a user, pixel values A, B and C illustrate the non-monotonicity of a
sample wavelength of around 570 nm (i.e. three different pixel values for a single wavelength).