YY/T 0850-2011Guide for evaluation of uncertainty in measurement of ultrasonic diagnostic and monitoring equipment acoustic output characteristics (English PDF)

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules.

1 Scope

This standard specifies the ultrasound diagnostic and monitoring equipment acoustic output parameter measurement uncertainty of terms and definitions, the main sources of uncertainty, Uncertainty assessment procedures and uncertainty evaluation, reporting and representation.

This standard applies to the ultrasound diagnostic and monitoring equipment (hereinafter referred to as "equipment") sound output parameter measurement Uncertainty Evaluation.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document.

Analyzing and processing GB/statistical processing and interpretation of normal sample outliers T 4883-2008 data

GB 9706.9-2008 Medical electrical equipment - Part 2-37. Ultrasound diagnostic and monitoring equipment requirements for the safety JJF 1001-2011 common measurement terms and definitions JJF 1059-1999 Evaluation and Expression of Uncertainty in Measurement

3 Terms

GB 9706.9-2008, JJF 1001-2011 and JJF 1059-1999 defined and the following terms and definitions apply to this document.

4 Measurement Uncertainty assessment procedures

Measured 4.1 Description When measured general description shall include the following.

a) The test procedure is described;

b) affect the measured parameters to be measured and clear units, measuring/test basis;

c) the relationship between the parameters to be measured and its influence (input), the mathematical model, given the measured parameters y and xi influence the relationship. y = f (X1, X2, X3)

Depending on the nature of the mathematical model to determine the combined standard uncertainty of the applicable formula can be omitted if the calculation and dissemination be measured coefficient. School d) the known systemic effects of positive value;