Metaphor Essay

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© Commonwealth of Australia 2012 First edition — October 2012 National Measurement Institute Bradfield Road, Lindfield, NSW 2070 PO Box 264, Lindfield, NSW 2070 T (61 2) 8467 3600 F (61 2) 8467 3610 W www.measurement.gov.au Abbreviations EM ELECTROMAGNETIC EMC electromagnetic compatibility ESD electrostatic discharge ICUMSA International Commission for Uniform Methods of Sugar Analysis IEC International Electrotechnical Committee ISO International Organization for Standardization MPD maximum permissible difference MPE maximum permissible error OIML International Organization of Legal Metrology CONTENTS Abbreviations ii Introduction iv 1. Scope 1 2. Terminology 1 3. Units of Measurement 3 4. Metrological Requirements 4 4.1 Scale 4 4.2 Classes of Accuracy 4 4.3 Error due to Influence Factor Variations 4 4.4 Other Sources of Error 5 5. Technical Requirements 5 5.1 Materials 5 5.2 Construction 5 5.3 Sealing 6 5.4 Instrument Markings 6 5.5 Presentation of the Displayed Value 6 5.6 Manufacturer’s Manual 6 6. Polarimeter Tubes 7 7. Quartz Plates 7 7.1 General 7 7.2 Sugar Values of Quartz Control Plates 7 7.3 Quality of the Quartz 7 7.4 Form and Dimensions 7 7.5 Tolerances on Form and Dimensions 7 8. Pattern Approval 8 8.1 General 8 8.2 Application 8 8.3 Sample Instrument 8 8.4 Documentation 8 8.5 Performance Tests 8 8.6 Examinations 9 9. Initial Verification 9 9.1 Legal Status of the Instrument Submitted for Verification 9 9.2 Verification Examination and Tests 9 10. Periodic Verifications 9 10.1 Reverification Frequency 9 10.2 Reverification Examination and Tests 9 10.3 Control Procedures 10 11. Metrological Control Marks 10 Annex A. Pattern Evaluation Performance Tests (Mandatory) 11 Annex B. ICUMSA International Sugar Scale 18 References 19 Introduction

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