Test
Procedures
OQ/PQ Operating Instructions
M1393R0
Page 25 of 60
4.3
Wavelength Check
The wavelength accuracy is measured by evaluating local maxima of absorbance on a
holmium filter in the UV range. These results are compared with the ones provided on the
certificate of the material.
4.3.1
Performing the Test
a)
Install the holmium filter (FIGURE 4-2) in the UV detector.
b)
Loosen the knurled screw (item 1, FIGURE 4-2) half a turn and pull the filter holder
(item 2, FIGURE 4-2) out of the light path (just pull it out by 5 mm (0.2“), the filter
holder remains in the filter body).
c)
Perform an autozero run. Either use the F8 key of CHROMELEON or press the
‘Autozero’ button of the UV detector.
d)
Place the filter back in its original position (all the way in the filter body), tighten the
screw.
e)
Start the sequence ‘XQ_1_Wavelength Check_NAN’ (or ‘_CAP’, respectively).
f)
Check the results in the CHROMELEON report. Verify that the reference values
correspond to the values listed in the certificate provided with the holmium filter.
1
2
FIGURE 4-2
The Holmium Filter for the UV Detector
