IEC 61676 pdf download Medical electrical equipment – Dosimetric instruments used for non-invasive measurement of X-ray tube voltage in diagnostic radiology
1 scope and object
This International Standard specifies the performance requirements of instruments as used inthe NON-INVASIVE MEASUREMENT of X-RAY TUBE VOLTAGE up to 150 kV and the relevantcompliance tests.This standard also describes the method for calibration and gives guidancefor estimating the uncertainty in measurements performed under conditions different fromthose during calibration.
Applications for such measurement are found in diagnostic RADIOLoGY includingmammography, cOMPUTED TOMOGRAPHY (CT), dental radiology and RADIOSCOPY.This standardis not concerned with the safety aspect of such instruments.
The requirements for electricalsafety applying to them are contained in lEC 61010-1.
The following referenced documents are indispensable for the application of this document.For dated references, only the edition cited applies. For undated references, the latest editionof the referenced document (including any amendments) applies.
IEC 60417(all parts), Graphical symbols for use on equipmentlEC60788:1984, Medical radiology – Terminology
IEC 61000-4-2:1995,Electromagnetic compatibility(EMC) – Part 4:Testing and measurementtechniques – Section 2: Electrostatic discharge immunity test.Basic EMC Publication
IEC 61000-4-3:2000，Electromagnetic compatibility (EMC) – Part 4-3: Testing and measure-ment techniques – Radiated， radio-frequency, electromagnetic field immunity test.Basic EMcPublication
IEC 61000-4-4:1995,Electromagnetic compatibility (EMC) – Part 4:Testing and measurementtechniques – Section 4: Electrical fast transient/burst immunity test. Basic EMC Publication
IEC 61000-4-5:1995,Electromagnetic compatibility(EMC) -Part 4:Testing and measurementtechniques – Section 5: Surge immunity test.Basic EMC Publication
IEC 61000-4-6:1996,Electromagnetic compatibility(EMC)- Part 4: Testing and measurementtechniques – Section 6: lmmunity to conducted disturbances,induced by radio frequencyfields. Basic EMC Publication
IEC 61000-4-11:1994，Electromagnetic compatibility (EMC) – Part 4: Testing and measure-ment techniques – Section 11: Voltage dips,short interruptions and voltage variationsimmunity tests. Basic EMC Publication
IEC 61010-1:2001，Safety requirements for electrical equipment for measurement，control,and laboratory use – Part 1:General Requirements
ISO 7000:1989, Graphical symbols for use on equipment – Index and synopsis
3 Terminology and definitions
For the purposes of this standard the following definitions apply.
The definitions given in this standard are generally in agreement with those in IEC 60788 and the ISO International vocabulary of basic and general terms in metrology. Any terms not defined in this subclause have the meanings defined in the above publications or are assumed to be in general scientific usage.
3.1 CORRECTION FACTOR dimensionless multiplier which corrects the INDICATED VALUE of an instrument from its value when operated under particular conditions to its value when operated under stated REFERENCE CONDITIONS
3.2 EFFECTIVE RANGE range of INDICATED VALUES for which an instrument complies with a stated performance. The maximum (minimum) effective INDICATED VALUE is the highest (lowest) in this range
3.3 INDICATED VALUE the value of quantity derived from the scale reading of an instrument together with any scale factors indicated on the control panel of the instrument