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Mass Foil Calibration
Thermo Fisher Scientific
The Model 5030 SHARP is calibrated for mass in the factory using a series
of null and span foils. The mass transfer standard foil sets are available from
Thermo Fisher Scientific, and should be used as part of a QA Program for
performing a QC check on the mass measurements. This mass foil
calibration procedure can be used for QC checks, auditing, and calibration.
•
It is recommended to perform an annual mass calibration on the Model
5030 SHARP Monitor.
•
The foil sets must be kept in a clean container.
•
The foils must not be wiped, otherwise a loss or gain of mass can occur
thereby biasing the mass calibration.
•
Foils sets can be returned to Thermo Fisher Scientific for recalibration
as necessary.
•
Separate foil sets are recommended for periodic QC checks, auditing,
and calibration.
•
Should the user suspect the foil window(s) has been damaged,
scratched, or coated, these foil sets should be returned to Thermo Fisher
Scientific for recalibration.
The null foil has the same approximate mass as a clean filter spot and the
span foil is a calibrated mass increase above the null foil. Therefore, the foils
come in a set and must not be mixed with other sets since a bias in mass
calibration will occur.
Since the beta attenuation method is linear with mass increase, the Model
5030 need not be calibrated in the exact range of beta attenuation per filter
spot. What is important, is calibrating the corresponding beta count
reduction with an increase of calibrated mass.
Zero and Span Foils
Foil Holder
Model 5030 SHARP Monitor Instruction Manual
Calibration
Calibration Menu
4-7
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