Shimadzu SPD-M20A - Exposure Time Setting; Wavelength Accuracy and Spectral Bandwidth Check

Chapter 6: Maintenance and Adjustments
SPD-M20A Service Manual
58
< Exposure time Setting>
Procedure
1) Install a water-filled flow cell.
2) Perform the exposure time automatic setting.
Judgment
1) Verify that the set exposure time and W lamp voltage satisfy the specifications.
Slit Width
Standard
Exposure time [mS]
D2
W
1.2 nm
Measurement value
Standard value
150 ms max.
340 ms max.
8 nm
Measurement value
Standard value
30 ms max.
50 ms max.
< Wavelength Accuracy and Spectral Bandwidth Check >
Procedure
1) Perform the automatic wavelength correction.
2) Perform the automatic wavelength check with both the 1.2 nm slit and 8 nm slit.
However, some items do not require measurement with the 8 nm slit. See the table
below.
Wavelength Check D2/Ho
1) Perform wavelength check (D2/Ho).
2) Confirm that the measurement value and true value difference is less than 1 nm for
the following 5 points.
Wavelength Standard
True Value
Measurement Value
Error
Standard Value
D2 (1.2 nm)
486.0 nm
< 1
656.1 nm
< 1
Ho (1.2 nm)
287.6 nm
< 1
360.8 nm
< 1
D2 (8 nm)
656.1 nm
< 1
Wavelength Check Hg
1) Perform wavelength check Hg.
2) Confirm that the measurement value and true value difference is less than (1nm for
the following 8 points.
Wavelength Standard
True Value
Measurement Value
Error
Standard Value
Hg
253.7 nm
< 1
404.7 nm
< 1
435.8 nm
< 1
546.1 nm
< 1
Hg
253.7 nm
< 1
404.7 nm
< 1
435.8 nm
< 1
546.1 nm
< 1