Thermo Scientific 5028i, Инструкция по эксплуатации

Страница: 151 / 330

Calibration
Calibration Procedure
Thermo Fisher Scientific Model 5028
i
Instruction Manual 4-9
The auto zero procedure of mass will begin and last approximately
270 seconds. When the zero is complete, the beta attenuation
measurement will remain closed and an average Beta count rate is
displayed.
5. Remove the zero/null foil and insert with the Span foil (e.g., 1328
ug) and press to begin the span calibration, or press to
stop the foil.
The span foil calibration procedure is now active and after another
270 seconds the calibration procedure should end, whereby a new
Mass Coef value is shown and the percent difference is shown from
the last foil calibration to the current calibration. This percent
difference can also be used to directly audit the mass coefficient
value since a percent difference in a mass coefficient is the same
percent mass difference overall.
6. After the span calibration, the screen will ask you to press
to accept the new calibration. Otherwise press to keep the
old Mass Coef value. Remove the span foil and press . The
bench will now open. Remove the filter holder, replace the filter tape