DB-20 will perform wavelength scan from 660.0 to 650.0nm as in the WL
Accuracy test in the first stage. The maximum value of wavelength will be
located, then the motor moves from 650.0 to 190.0nm, and then from 190.0 to
660.0nm.
In second stage, DB-20 will scan from 660.0-650.0nm again; find another
wavelength position at the same time.
In the third stage, DB-20 will moves from 650.0-1100.0nm, from 1100.0-
660.0nm and perform a wavelength scan the third time and mark the third
wavelength peak position.
From the three values recorded in the 3 stages, DB-20 will obtain the
maximum wavelength value and the minimum wavelength value, taking the
mean of the two values i.e. (max-min)/2. If the result is within
0.1nm, the WL
Reproducibility item will display <OK>.
3. <Bandpass>
DB-20 perform a wavelength scan from 660.0 to 650.0nm as in WL Accuracy
test. From the measured data, DB-20 identified the maximum value and the
minimum value and taking the mean of the absorbance value i.e. A/2= (Max-
Min)/2.
At A/2 Abs value, two wavelength values that are close to A/2 can be
identified. The difference between these two wavelengths is the value of band
pass. If the bandpass value is within 1.5nm, the bandpass item will display
<OK>.
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