The following page of resources may be of help for anyone requiring information on traceability, the use of instruments, or guidelines on the methods for calculating uncertainty. In particular we offer a guide "Making the Most of your Calibration Certificate" that will assist in properly understanding the calibration certificates issued by MSL.
MSL conducts a one-day course on Measurement, Uncertainty and Calibration, which includes more general advice on the calculation of uncertainty.
The ISO Guide to the Expression of Uncertainty in Measurement is available from the Standards New Zealand (Private Bag 2439 Wellington). This is a very mathematical handbook suitable only for those who have a good grasp of 6th and 7th form mathematics, and already have some experience of handling uncertainties, but it does give the internationally accepted procedure for calculating uncertainties. An adaptation of the ISO guide is presently available at the NIST website (Technical Note 1297).
A free uncertainty calculator in the form of a Microsoft Office 97 spreadsheet is available for downloading (XLS 45.5KB). This spreadsheet implements the method for combining uncertainties recommended in the ISO Guide to the Expression of Uncertainty in Measurement.
ISO/IEC 17025 General Requirements for the Competence of Testing and Calibration Laboratories is available from Standards New Zealand or IANZ (Private Bag 28908 Remuera, Auckland 1136).
Traceable Temperatures : An introduction to temperature measurement and calibration by J. V. Nicholas and D. R. White, second edition, (Wiley, Chichester) 2001.