biosystems BA 400 - Metrology

6.5.2.2. Metrology
is option is used to check the analyser photometry status. See Figure 6.15.
e following checks can be made:
• Repeatabilty of the readings.
• Stabiliity of the readings.
• Absorbance reading.
Figure 6.17 Photometric verication screen.
To make a verication the rotor must be lled with distilled water. is can be performed by the analyser or the
user can do it manually.
1. Select the rotor lling mode and the well where the readings will be made
2. Press the icon for raising or lowering the wash station in order to remove or insert a rotor.
3. If you want to measure the absorbance of a specic reagent or uid, select the manuall lling option. Dispense
the uid to be measured into a well. In the screen, select the well where the uid was dispensed.
4. Select the type of measurement to be made.
5. Press the adjustment button to start the measuring process.
Repeatability
is verication takes measurements in all the wavelengths for 3 minutes. It is used to verify the repeatability of
the photometric system readings
After taking the measurements it shows the following parameters for each wavelength:
• Mean
• Standard deviation of all measurements
• Coecient of variation (CV)
• Maximim absorbance
• Minimum absorbance
 See chapter AIII ranges accepted for parameters.
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