2. 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

3. 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

4. TRAINING FOR THE WEIGHTS AND MEASURES OFFICIAL Sixth in a series of 14 Module Six “Field Standards and Test Equipment”

5. This module will introduce you to the types of standards and equipment you will use in your profession. It will also explain the appropriate care and use of each. This module will introduce you to the types of standards and equipment you will use in your profession. It will also explain the appropriate care and use of each. General Overview

6. Module Objectives Be familiar with the standards and equipment you will use Understand which standards and equipment to use for a particular application Know the importance of maintaining and caring for your test standards and equipment

7. Your Standards and Equipment What will you use to test commercial weighing and measuring equipment? A variety of standards and equipment using units of: Length Time and Energy Volume Weight

8. Your Standards and Equipment design materials construction marking tolerances NIST Handbook 44 regulates commercial W&M equipment Other handbooks from NIST address inspector’s standards NIST Handbook 105 series determines:

9. Your Standards and Equipment Systems of Weights and Measures Used “US Customary” is the most common Gallons, ounces, cubic feet, etc. “System International” (SI) is also legal Liters, grams, meters Large Metric Standards are rarely used

10. Your Image Professionalism is Important Carry a copy of the certificate of accuracy Evidence of accuracy is reassuring Remember: “Clean Equipment is Accurate Equipment” Don’t use slang terms for your standards Maintain integrity of your equipment & standards

11. Mass (Weight) Standards Mass and Weight Are Different Mass is quantity Weight is force (Force as referenced in Module 5, Legal Metrology) In this module we will treat the terms as synonymous

12. Mass (Weight) Standards There are Many Types of Mass Standards n Ounces or grams n Tons and kilograms n Materials are generally stainless steel or cast iron n NIST Handbook 105-1 discusses mass standards

13. Mass (Weight) Standards US Customary US Customary Inspector’s Weight Kits Metric

14. Mass (Weight) Standards

15. Weight Carts NIST Handbook 105-8 applies

16. Standard: Test Measure: Prover: Flask, measuring cylinder, graduate: Cubic Measure: Volumetric Standards Refers to all sizes and types of volume standards Sizes up to and including 50 liters or 10 gallons Sizes larger than 50 liters or 5 gallons Generally describes glassware Used for measuring dry products Avoid using slang terms Many terms are used for these standards for uniformity

17. Using Volumetric Standards n Usually requires reading a meniscus n Meniscus – curve of the surface of a liquid confined in a measuring cylinder or sight glass n Most liquids curve up – mercury curves down n Reading a meniscus correctly is a skill you must acquire

18. Read the bottom of the curve The Meniscus How you read a meniscus will affect the accuracy of the measurement

19. To Deliver or Contain Volumetric Standards fall into two types: To “Contain” To “Deliver” Abbreviations TC, TD or IN, EX are often used

20. To Deliver or Contain” n One standard will hold or “contain” its stated volume, the other delivers it n Each type must be used correctly for accurate measurement

21. To Contain n A “to contain” standard must be clean and dry to measure accurately n When drained after use, liquid residue inside reduces the volume n The next measurement would be in error because of the volume of residual liquid

22. To Deliver n These standards are designed to hold in excess of their stated volume n The excess is equal to the residual n If filled and emptied correctly, it will “deliver” its stated volume n In a wet condition it will hold its stated volume n Standard can be reused without drying between measurements

23. Conditioning a “To Deliver” Flask A “to deliver” flask must be conditioned or “wetted down” before use n Flask is emptied in a specific way n Filled flask emptied during 30 seconds Then tilted to 80 degrees and drained for ten seconds

24. Temperature Considerations n Temperature must be considered when making any volumetric measurement n Make adjustments if necessary

25. Types of Volumetric Standards  Volume standards come in many shapes, sizes, and forms  They are generally designed for specific tasks

26. Glassware, Graduates and Flasks Most common for checking quantity of packaged goods ranging from: 2 fl oz (50 ml) to 1 gal (4 L) When smaller volumes are needed, pipettes and burettes are used Handbook 105-2 discusses glassware

27. Test Measures For testing gas dispensers 1, 5, or 10 gallon sizes NIST Handbook 105-3 discusses test measures and provers Five gallon test measure

28. Test Measures Vehicle mounted test measures

29. ProversProvers Larger volume standards, because of size and weight are either static or vehicle mounted

30. Bell Prover Specialized prover for testing vapor meters Kept and used in a temperature controlled environment

31. Cubic Measures Used to measure dry products Available in convenient sizes 1 cubic foot – 1 cubic yard, or metric equivalent

32. Precise Volume Measures A measure with precise volume is often called a pycnometer or density cup Used to determine density of viscous fluids Weigh product and use density to calculate volume

33. Length Standards Standards of length can take many forms: Standards of length can take many forms: tapes, rulers, calipers, micrometers, depth gauges, pre- measured distances, etc.

34. Tapes and Rulers Tapes Tapes Smaller tapes (6 – 25 ft ) may not have been certified. Be sure to check Fabric tapes are available to test fabric measuring devices “Decimal” tapes with feet divided into tenths instead of inches are useful for calculation Flexible metal 25 – 100 ft.

35. MicrometersMicrometers Used for measuring small distances, up to about ½ inch

36. CalipersCalipers Used to determine either internal or external dimensions

37. Depth Gauge Used to determine fill level of liquids Example: Measuring the level of paint in cans

38. Distance Simulators Used for testing taximeters

39. Pre-Measured Distances Another method to check taximeters A Pre-measured Mile

40. Fifth Wheel Once used for testing taximeters

41. StopwatchesStopwatches Taximeters Parking Meters Coin Operated Laundry Machines Verify flow rates of volume meters NIST Handbook 105-5 applies to stopwatches

42. ThermometersThermometers Two principle types: n Mercury-in-glass n Electronic NIST Handbook 105-6 applies to thermometers

43. Mercury-in-Glass Thermometers Two types: Partial-immersion Partial-immersion (left) is immersed to a line or graduation Total-immersion Total-immersion (right) is designed to be read at the mediums surface Know which type you are using

44. Electronic Thermometers n May have an analog or digital readout n Digital is the most common

45. Electronic Thermometers Sensors can be: Thermocouple: Economical and easy to use Thermistor: Great accuracy and sensitivity 32°F to 212°F Resistance Temperature Detectors (RTD): Are the most precise, stable and repeatable

46. Electric Watthour Standard Standard uses a high precision watthour meter and resistors

47. Weighing Devices Electronic Primarily used for package inspection

48. Weighing Devices Equal Arm Balance: Is fast, accurate, and reliable In use before digital electronic scales Still valid for package checking

49. Weighing Devices Large platform scales with 1000 lb capacity

50. Pressure Gauges Used when checking compressed gases in cylinders

51. Zeltec® Octane Analyzer Screens gasoline samples Results cannot be used to remove product from sale

52. Trap Tanks False tanks use fill pipe of original tank for undercover screening for accuracy of fuel dispensers

53. Water Finding Paste Detects presence of water in fuels Changes color in presence of water

54. RFI/EMF Producing Equipment Electronic devices should not be affected by RFI/EMF interference

55. Vapor Recovery Nozzle Tester Simulates vehicle gas tank to determine vapor, not liquid, is recovered

56. Tools and Safety Gear Specialized clothing and equipment needed for: Electric meters LPG meters Heavy capacity scales Chemicals and contaminants Don’t forget a first aid kit!

57. Care of Equipment n Keep equipment clean n Store it correctly n Exercise care when using

58. SummarySummary Familiar with the standards you will use Know which standards are used for what task Know the importance of maintenance Have confidence in their accuracy

59. ConclusionConclusion This training module has provided you with a better understanding of your standards, their use, and integrity.

60. TRAINING FOR THE WEIGHTS AND MEASURES OFFICIAL This Concludes Module 6 “Field Standards & Test Equipment”