16
Spectrometer Menu Functions
Scan
When the
Single
mode is selected in the display screen, the Scan menu function acts as a snapshot. After
selecting the Single mode, select
Spectrometer | Scan
from the menu to take one scan of the sample.
When the
Continuous
mode is selected in the display screen, select
Spectrometer | Scan
from the menu to
continuously take scans.
Select Concentration Wavelength
This function is used when calculating the unknown concentration of a substance in a solution. You select
this function after you take an absorbance measurement of a standard solution with a
known
concentration.
Choose the wavelength of the highest peak in your absorbance spectrum. Then select
Spectrometer |
Calculate Calibration Curve
from the menu and complete the rest of your concentration experiment. See
pages 31-32 for step-by-step instructions on calculating concentrations.
Calculate Calibration Curve
Concentration is the amount of a specified substance in a solution. In order to calculate concentration, you
must take absorbance measurements of a series of solutions with different
known
concentrations. The
length of the sample and the wavelength chosen for monitoring the amount of light absorbed are constants.
Then a linear plot from taking these scans is obtained. This Calibration Curve is used to determine the
unknown
concentrations. See pages 31-32 for step-by-step instructions on calculating concentrations and on
using this dialog box.
Enable Strobe
This function allows you to enable or disable the triggering of external strobes through the spectrometer.
You would only select
Spectrometer | Strobe Enable
from the menu if you were operating an external
strobe source. The CHEM2000 and CHEM2000-UV-VIS systems do not include a strobe light source.
However, the ISS-UV-VIS that comes with the CHEM2000-UV-VIS can be turned off and on through the
software and this function.
Spectrometer Configuration
Intercept
From the Wavelength Calibration Report that
came with your system, enter the
Intercept
under the
Master
column. Though the
CHEM2000 and CHEM2000-UV-VIS come
with only a Master spectrometer channel,
additional spectrometer channels can be added
at any time. Contact an Applications Scientist
for more information.
First, Second and Third Coefficients
From the Wavelength Calibration Report that
came with your system, enter the
First
Coefficient
,
Second Coefficient
and
Third
Coefficient
under the
Master
column. Though
the CHEM2000 and CHEM2000-UV-VIS come
with only a Master spectrometer channel,
additional spectrometer channels can be added
at any time.
