VWR M4 - Page 16

Important information Before verifying the performance, the instrument needs to be
preheated for 30 minutes, and then re-measure dark current.
Verifying Wavelength Accuracy and Wavelength Repeatability
Select Tab Wavelength accuracy in the Performance verification interface.
Standard Sample:
Holmium oxide solution or equivalent filter
Measurement:
1. Remove something in the measurement channel, close the sample
chamber cover, press the wavelength value, type in the wavelength of
measurement, press the button Zero;
2. Put the Standard Sample in the measurement channel, press the
button Measure;
3. Repeat step 2 to do measurement three times. The difference between
the average of the three measurements and the standard value is the
single-point wavelength tolerance. The difference between the
maximum and minimum values of the three measurements is single
point wavelength repeatability;
4. Repeat step 1-3 to do measurement single-point wavelength tolerance
one by one. The maximum value in the single-point wavelength
tolerance is wavelength accuracy. The maximum value in the single-
point wavelength reproducibility is wavelength repeatability.
Verifying Photometric Accuracy and Photometric Repeatability
Select Tab Photometric accuracy in the Performance verification interface.
Standard Sample:
NIST 930D or equivalent filter
Measurement:
1. Remove something in the measurement channel, close the sample
chamber cover, press the wavelength value, type in the wavelength of
measurement, press the button Zero;
2. Put the Standard Sample in the measurement channel, press the
button Measure;
3. Repeat step 2 to do measurement three times. The difference between
the average of the three measurements and the standard value is the
single-point photometric tolerance. The difference between the
maximum and minimum values of the three measurements is single
point photometric repeatability;
4. Repeat step 1-3 to do measurement single-point photometric tolerance
one by one. The maximum value in the single-point photometric
tolerance is photometric accuracy. The maximum value in the single-
point photometric reproducibility is photometric repeatability.
Verifying Stray Light
Select Tab Stray light in the Performance verification interface.