Biosan OD Plate, Руководство пользователя

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15
11.
Calibration
The calibration is traceable through the VSL
– NEDERLANDS ME-
TROLOGISCH INSTITUUT and METROSERT Ltd. The traceability chain
is shown below:
The absorbances of the reference glasses are calibrated at the inter-
vals of five years at the VSL at several wavelengths between 400 nm
– 700
nm.
The reference glass is then used to calibrate the Reference Instru-
ment.
The glasses from the OD plate is then calibrated by measuring the
absorbances of the glasses with the reference instrument.
The uncertainty of the calibration is calculated according to the pub-
lication EA-4/02 (Expression of the Uncertainty of Measurement in Calibra-
tion).
The main uncertainty factors are the uncertainty of the calibration of
the reference glass and the repeatability of the measurements.
Reference glass VSL
and Metrosert
Reference Instrument
OD Plate