Hitachi CHROMASTER 5160, Instruction Manual

Page: 542 / 1022

(b) Check of wavelength accuracy
Check the wavelength accuracy by using the bright line
at 254 nm of the Hg lamp (see section 4.4.4 (6)).
“GOOD” will be indicated if the wavelength error is
within
±
3 nm, or “FAIL” will be indicated if the error
exceeds
±
3 nm.
NOTE
: First adjust the xenon lamp position (see 5.2.1
(3)) and then check the wavelength accuracy.
An accurate wavelength check cannot be
made unless the lamp position is adjusted.
NOTE
: If “FAIL” is indicated, wavelength calibration is
required. Refer to paragraph (2) below for
the calibration.
(2) Calibration of Wavelength Accuracy
If there is a wavelength deviation, then adjust the
wavelength in the wavelength calibration mode (special
mode).
(a) Calibration of excitation wavelength
(i) Press the
UTLTY
SET UP
key, and the utility setting
screen appears.
<Utility setting screen>
UTILITY (OFFSET=1, TIME CONSTANT=2,
99
USE PROG=3, PMT VOLT=4, OTHERS=5)
Press numeric keys 9 9 and then the ENT key.
(ii) The excitation wavelength calibration mode
screen appears.
<Excitation wavelength calibration mode screen>
Ex WL ADJUST (1 - 20)
10 (ONLY FOR FACTORY USE) (-2)
The present offset value is indicated at Ex WL
ADJUST. Indicated at the bottom right of the
screen is the wavelength check result (deviation
of wavelength; indication range of –10 to 10).
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