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5.3.2.3 Adjustment of PC type light source mirror
When the light source is replaced, if the beam from the lamp is not incident upon the entrance slit
correctly, problems will occur, such as insufficient light intensity, a non-linear baseline, and
incorrect values for measurements. Whenever the lamp is replaced, be sure to adjust the light
source mirror.
WARNINGS!:
(1) The lamp is hot when lit. Do not touch with bare hands.
(2) Wear glasses (ordinary glasses or sunglasses) during adjustment to
protect your eyes from ultraviolet rays.
(3) Do not touch the wiring either with your hand or with a screwdriver.
Contact with the wiring may cause electric shock.
Note: Never loosen any screws other than those required for lamp replacement.
<<Adjustment of light source mirror for halogen lamp>>
(1) Turn on the instrument.
(2) Start [Abs/%T meter] from the [Spectra Manager] window and appears the [Abs/%T meter]
window.
(3) Set parameters as follows.
V-630 measurement parameters V-650/660/670 measurement parameters
Photometric mode Sample Photometric mode Sample
Response Fast Response Fast
Wavelength 500 nm Band Width 2.0 nm
Halogen lamp Turn on Wavelength 500 nm
HT Voltage 200 V
Halogen lamp Turn on
(4) Slide the lid of the light source unit to remove it.
Note: Do not mistakenly loosen other screws instead of the adjustment screw.
(5) Turn the WI lamp stopper adjustment screw (Fig. 5.5 or Fig. 5.6) and search for a position
where the value displayed on the monitor is a maximum.
(6) Replace the lid of the light source unit.
<<Adjustment of light source mirror for deuterium lamp>>
(1) Turn on the instrument.
(2) Start [Abs/%T meter] from the [Spectra Manager] window and appears the [Abs/%T meter]
windows.
(3) Set parameters as follows.
V-630 measurement parameters V-650/660/670 measurement parameters
Photometric mode Sample Photometric mode Sample
Response Fast Response Fast
Wavelength 250 nm Band Width 2.0 nm
Deuterium lamp Turn on Wavelength 250 nm
PMT Voltage 200 V
Deuterium lamp Turn on
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