TRAINING FOR THE WEIGHTS AND MEASURES OFFICIAL COURSE CURRICULUM MODULE 1Introduction MODULE 2Laws & Regulations MODULE 3Enforcement Procedures MODULE 4Legal Action MODULE 5Legal Metrology MODULE 6Field Standards & Test Equipment MODULE 7Basic Weighing / Measuring Principles

TRAINING FOR THE WEIGHTS AND MEASURES OFFICIAL COURSE CURRICULUM MODULE 8Device Type Evaluation MODULE 9Weighing Devices MODULE 10Measuring Devices MODULE 11Weighmaster Enforcement MODULE 12Petroleum Products MODULE 13Quantity Control MODULE 14Service Agencies and Agents

TRAINING FOR THE WEIGHTS AND MEASURES OFFICIAL Fifth in a series of 14 Module Five “Legal Metrology”

This module will introduce you to the: General Overview Significance of Legal Metrology to Weights and Measures OfficialsSignificance of Legal Metrology to Weights and Measures Officials National and International processes used to ensure accuracy of standards in CaliforniaNational and International processes used to ensure accuracy of standards in California

Be familiar with the role NIST plays in Legal Metrology Module Objectives Understand the origin of units of measurement Be able to understand the concepts of accuracy, precision, and measurement uncertainty Understand the difference between mass and weight

HistoryHistory Body Parts Objects Grains, etc. Early Measurement Systems Egyptians Greeks Romans Civilizations Babylonians Anglo-Saxons

HistoryHistory English System of Measurement Distance- Distance - Foot, yard, & mile Area - Area - Acre Volume - Volume - pint, quart, gallon Weight – Weight – Avoirdupois-ounce, pound, ton Troy-ounce, pound

HistoryHistory US Customary System US Customary System Developed from English system Early standards brought from England No uniform system in U.S. Troy pound used for precious metals Avoirdupois developed into U.S. Customary System

History of Metric System Developed after French Revolution of 1790’sDeveloped after French Revolution of 1790’s Earth used as basis in early systemEarth used as basis in early system Units defined rationally and related to each otherUnits defined rationally and related to each other One cubic decimeter = one liter One liter of pure water = one Kilogram

In 1875 “Treaty of the Meter” established the International Bureau of Weights and Measures formerly known as the French Bureau International des Poids et Measures (BIPM) The BIPM took responsibility for the metric system and established the General Conference of Weights and Measures Legal but not obligatory in the U.S. since st Conference met in 1999 History of Metric System

International Standards Meter, Kilogram defined at the 11 th General Conference in 1960 International kilogram kept at the BIPM in Serves, France Meter defined by wavelength of light Metric system now called “Systeme Internationale”

Mass and Weight “Stuff” Mass is “Stuff” Force Weight is Force

OrganizationsOrganizations BIPM - BIPM - Maintains international standard WMD - WMD - Interacts with state and local weights and measures NIST - NIST - Maintains U.S. standards State& Local State & Local weights and measures

Organization Chart

NIST Traceability

Comprised of: CDFA CDFA DMS Metrology L.A. Metrology L.A. Metrology California Weights & Measures Metrology

DMS Metrology Responsible for: State Standards Certification of State and County Standards Recognition of Certification Source (other labs)

Standard Object, artifact, system or experiment Physical Quantity Physical Quantity Basis for Measurement Basis for Measurement Traceability Traceability Error Error Uncertainty Uncertainty Environment Environment

Standards – Handbook 105 Series Handbook 105 Series Handbook “Specifications and Tolerances for” Number Field Standard Weights (NIST F Class) Field Standard Measuring Flasks Graduated Neck Type Volumetric Field Standards Liquefied Petroleum Gas and Anhydrous Ammonia Liquid Volumetric Provers Field Standard Stopwatches Thermometers Dynamic Small Volume Provers Weight Carts (Draft 3)

Standards & Testing Apparatus n Interchangeable terms n HB 44 addresses standards (Appendix A) n Adequacy n Tolerances n Accuracy

StandardClassifications Standard Classifications Sources Sources Intrinsic Intrinsic Ratio Ratio Location Location National National Field Field Intended Uses Working Working Transfer Transfer Accuracy Levels Primary Primary Secondary Secondary

TraceabilityTraceability Documentation is essential “Property of the results of a measurement or the value of a standard whereby it can be related to a stated reference, through an unbroken chain of comparison all having stated uncertainties” (NIST HB143)

Care of Standards Proper Care Is Important for: Accuracy Accuracy Usefulness Usefulness Clean Clean Dry Dry Storage Storage

SummarySummary History and development of U.S. customary and metric systems International and National Standards Organizations involved in metrology Mass and weight Standards - Care and use

ConclusionConclusion This training module has provided you with a better understanding of the importance of metrology to the field official.

TRAINING FOR THE WEIGHTS AND MEASURES OFFICIAL This Concludes Module 5 “Legal Metrology”