Metrohm IC Net 2.3 User Manual
Page 273
6.28 844 UV/VIS Compact IC
IC Net 2.3
263
ample for the wavelength set for measuring channel
1:
akt
Int
zero
Int
Abs
1
1
log
λ
λ
=
where:
zero
Int
1
λ
The intensity measured when recording
the zero spectrum at the wavelength set
for measuring channel 1.
akt
Int
1
λ
The actual intensity measured at the
wavelength set for measuring channel 1.
If you are working with a reference channel (can be
activated on the subtab
Configuration
) the formula is
as follows:
refakt
Int
refzero
Int
akt
Int
zero
Int
Abs
λ
λ
λ
λ
log
log
1
1
−
=
where:
refzero
Int
λ
The intensity measured when recording
the zero spectrum at the wavelength set
for the reference channel.
refakt
Int
λ
The actual intensity measured at the
wavelength set for the reference channel.
Intensity
The intensity (y-axis) is given as a function of the wa-
velength (x-axis).
Zero
A click on
Zero
shows the last zero spectrum to have
been recorded (a zero spectrum is recorded by click-
ing on the
button on the subtab
Man-
ual/Detector
of the 844 control window).
The zero spectrum is a reference spectrum. It should
be recorded at a time at which there is no sample in
the measuring cell. It is used for calculating the ab-
sorption spectrum (see above formulas).
Wavelength, nm
Sets the shown x-axis range
Entry range:
190 ... 900 nm
, (standard settings 190
nm and 900 nm,
Upper limit
must be higher than
Lower limit
).
Spectrum
Sets the shown y-axis range
Standard settings:
0 ... 100.
Spline
Activates curve smoothing.
Send values to the 844 UV/VIS Compact IC.