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NPL's diagnostic and mammographic calibration service is for ionisation chambers, to be used intentionally as secondary standards, or for instruments required for measurement of the greatest accuracy. Calibration of either an ionisation chamber alone or of a complete instrument is also available.
Calibration service specification and availability
Calibrations are normally carried out between October and December each year, and are undertaken with X-ray qualities in accordance with BS IEC 61267:2006 as follows:
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