XD 7500
Operation
87
ba77191e01 - 71310060
04/2018
4.8
Spectrum
4.8.1
General information
With the
Spectrum
function, the
Absorbance
or
Transmission
is measured
and recorded depending on the wavelength. The wavelength range can be
freely selected within the measuring range of the photometer. The increment
is 1 nm.
A spectrum is recorded without using any methods or profiles. All settings are
made in the measurement process.
Baseline
Before recording a spectrum, a baseline must be recorded with a suitable
zero cell, e.g. with deionized water. The baseline must cover at least the
wavelength range of the spectrum to be recorded. A baseline measured once
remains stored in the photometer until
the recording of a new baseline
the expansion of the wavelength range on the
[Setup]
menu
exiting the
Spectrum
mode or switching off the photometer.
Settings
You can record a spectrum with standard settings without opening the setting
window.
The following settings are possible for a spectrum:
* Default setting:
Input field
Possible entries
Wavelength start
190* ... 1100 nm
Wavelength stop
190 ... 1100* nm
Mode
Absorbance
* or
Transmission
Smoothing
Yes
* or
No
Color of graph
Color selection for the curve
Scaling
Auto
* or
Manual
Scaling
:
Auto
*
The instrument adjusts the axis scaling (minimum
and maximum values of the axis) to the measure-
ment values during the measurement. The entire
line is always visible.
Scaling
:
Manual
Y-axis min
Y-axis max
The axis scaling (minimum and maximum values
of the axis) is specified manually.
With
[Save]
you can save your current settings as profile.
With
[Open]
you can load a saved profile.
Profiles for spectra have the file extension, ".profil".
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