Instruction manual

7. Hardware Validation
7-50
RF-20A/20Axs
18. Calculation of the angle of turn required
to move the emission grating to the
761 nm position
The angle of turn required to move the emission grating
from the home position to the 761 nm position is
calculated.
19. Determination of the span correction
coefficients (S values)
Using the ratio between the angles of turn of the
gratings calculated for the excitation and emission sides
at each of the wavelengths and the angle of turn from 0
to 761 nm determined by the instrument's design, the
span correction coefficients (S values) for the excitation
and emission sides are calculated.
The values determined by the design are corrected
based on the span correction coefficients (S values)
recorded here, and the angles of turn of the gratings for
each wavelength, set when measurement is performed,
are fixed.
20. Reading the 254 nm emission line
spectrum at the excitation side
Adjust the emission side grating to the 254 nm position.
Next, scan the excitation side grating in the vicinity of
the low-pressure Hg (mercury) lamp's emission line
wavelength of 254 nm, and record the peak of light
intensity with the photosensor at the emission side.
21. Reading the 507 nm emission line
spectrum at the excitation side
Scan the excitation side grating in the vicinity of
507 nm, and record the peak of light intensity with the
photosensor at the emission side.
22. Reading the 761 nm emission line
spectrum at the excitation side
Scan the excitation side grating in the vicinity of
761 nm, and record the peak of light intensity with the
photosensor at the emission side.
23. Reading the 254 nm emission line
spectrum at the emission side
Adjust the excitation side grating to the 254 nm
position.
Next, scan the emission side grating in the vicinity of
the low-pressure Hg (mercury) lamp's emission line
wavelength of 254 nm, and record the peak of light
intensity with the photosensor at the emission side.