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-Measurement Verification- Compressed Gases Study Guide

-Measurement Verification- Compressed Gases Study Guide. Provided By Charlie Nelson. Introductory and Over View. Compressed Gases and Electric Meter Program Law & Regulation Regulation Code Application Terminology and Technical information.

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-Measurement Verification- Compressed Gases Study Guide

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  1. -Measurement Verification- Compressed Gases Study Guide Provided By Charlie Nelson

  2. Introductory and Over View • Compressed Gases and Electric Meter Program • Law & Regulation • Regulation Code Application • Terminology and Technical information

  3. Compressed Gases Program within Weights & Measures • LPG • Vapor Meters • Cryogenics • Carbon Dioxide • Compressed Natural Gas (Mass flow Meters) • Utility Billing (Electric and water included) • Compressed Gas Cylinders • Hydrogen Gas (tentative)

  4. Law & Regulation Law vs Regulation Law ( Business and Professions Code) – Enacted by Legislation Regulation (California Code of Regulation) – Adopted by the Director…

  5. Law & Regulation Who is the “Director”? Director – Secretary of Food & Agriculture State Sealer – Director of Measurement Standards

  6. Business and Professions Code B&P Code Sections(most common): 12027 - Authority to enforce 12107 - Tolerances and Specifications 12500.5 - Type Approval 12510 - Use of incorrect device 12515 - Notification 12532 - Service Agency

  7. Business and Professions Code B&P Code Sections: Tagging of Device(s): • B&P – 12500.10: Authorization to affix a Unapproved device “Yellow” tag • B&P – 12506: Authorization to affix a Out of Order “Red” tag • B&P – 12501.3: Authorization to allow use of incorrect device “Blue” tag

  8. California Code of Regulations Special Exemptions for Enforcement Retroactive vs. Non-RetroactiveRequirements How does this apply?

  9. California Code of Regulations Retroactive vs. Non-Retroactive Retroactive Requirement are identified by print in upright roman type Non-Retroactive Requirements are identified byprint in italics What does this mean?

  10. California Code of Regulations Retroactive Requirement : Are enforceable with respect to all equipment Non-Retroactive Requirements: Are enforceable after the effective date for: (a) devices manufactured within a state after the effective date; (b) both new and used devices brought into a state after the effective date; and (c) devices used in noncommercial applications which are placed into commercial use after the effective date.

  11. California Code of Regulations General Code(Specific Code supersedes General Code) • Application • Specifications • Notes • Tolerances • User Requirements

  12. A. Application (3.32) • A.1. General. – This code applies to LPG and NH3 • A.2. Devices Used to Measure Other Liquid Products not Covered in Specific Codes. Example Freon… • A.3. Exceptions. – This code does not apply to mass flow meters (see Section 3.37. Code for Mass Flow Meters). • A.4. Additional Code Requirements. – In addition to the requirements of this code, LPG and Anhydrous Ammonia Liquid-Measuring Devices shall meet the requirements of Section 1.10. General Code.

  13. Specifications Type Approval Requirements Device Design – Size, Shape, and etc… Supersedes General Code If specific code does not address a specific specification issue then you may refer to General Code for requirements

  14. Notes The section addresses specifically to the Inspectors performing tests.

  15. Tolerances Basic tolerance for all device are listed under the “T” section of CCR: Types of Tolerance: • Normal test • Special test • Acceptance tolerance • Maintenance tolerance Equation for tolerance M – S S x 100 = +% Error

  16. User Requirements The section applies to Device users and how they operate their weighing and measuring devices. Example: Scale out of level… It is user or operator’s responsibility to maintain level condition

  17. Temperature and Pressure Standard Conditions for various device program: LPG – Correction to 60⁰F Vapor Meters - Correction to 60⁰F Cryogenics – Corrected to NBP @ 14.696 PSIA Cryogenic Gases – Corrected to NTP (70⁰F @ 14.696 PSIA) Utility Billing (gases) - Corrected to 14.73 PSIA

  18. Electric Meters Meter Identification and Marking Requirements (a) Manufacturers’ name or trademark, type designation, and serial number. (b) Voltage rating. (c) Test amperes (TA). (d) Maximum amperes (CL) {meter class}. (e) Watt-hour or disk constant (Kh) {expressed as watt-hours per revolution}. (f) Register ratio (Rr) and multiplier (if 10 or larger). (g) Frequency rating (Hz). (h) Number of meter stator(s) or elements (polyphase). (i) Ratio or rating of auxiliary devices.

  19. Electric Meter Formulas

  20. Electric Meter Suitability. Meter class must meet a minimum of Class 60 or higher

  21. Electric Meter Formulas Determine value of meter revolution and minimum meter revolution for testing Basic formula Khs X Rs = KhmX Rm Example: Standard Kh is 3.6 and Revolution of the standard is 8 (min) 3.6 x 8 = 28.8 The Kh of the meter is 2 , thus 28.8/2= 14.4 , this means the meter revolution needs to rotate 14.4 times in the test (2 x 14.4 =28.8)

  22. Ohm’s Law

  23. Electricity Applying Ohms Law Example: A heater output is 1500 watts and you have a 15 amp/120 volt plug outlet this means 120 volts x 15 amps will supply 1800 watts therefore the plug outlet is ok for that service, if you have two heaters then 3000 watts / 120 = 25 amps therefore you will need to connect to a 25 Amp plug service to be adequate

  24. Gas - Boyles and Charles Law • Gas (Boyle’s law) • (Charles law) T=k*V or V=k*T or V/T=k p = Pressure V= Volume T= Temperature k = Constant

  25. Gas equation Examples Example: For Boyle’s Law - 100 Cubic Feet of gas at 11 in. wc @ altitude pressure of 13.17 psi (3000 ft) needs to be corrected to base pressure of 14.73 psi (Sea level) = = 0.397psi + 13.17 14.73 = 0.92 x 100 cubic feet = 92 Cubic feet

  26. Gas equation Examples Charles Law - Temperature compensation to correct to 60⁰F Vapor meter measures gas corrected to 60⁰F but temperature is 80⁰F how much volume correction is need to bring volume to equivalent to 60⁰F? =V*(460+60⁰F)/(460+80⁰F) = V*(520/540) = 0.96 =V*0.96

  27. Compressed gases in Cylinders Labeling (1) Cylinders shall have the tare weight legibly stamped on the cylinder. (2) All tare weight values required in this article shall be preceded with the letters “T.W.” or the words “Tare Weight.” (3) The tare weight shall include the weight of the cylinder, the valve and other permanent attachments. The weight of the protective cap shall not be included in either the tare or the gross weight. Tare tolerances 1/2 percent for tare weights of 20 lb, or less 1/4 percent for tare weights of more than 20 lb.

  28. Compressed gases in Cylinders Labeling - continued (b) Actual Tare Weight. When acetylene cylinders are filled but are not acetone to the stenciled tare weight, the actual tare weight must be shown on the tag with the net contents statement. (c) Net Contents. The net contents must be expressed in terms of cubic feet, or pounds and ounces, or units of the metric system. (d) Identity. The identity of the product must be shown. (e) Name and Address. The name, address and zip code for the responsible company must be shown on cylinder. (f) Liquefied Petroleum Gas Cylinder Contents. Cylinders or bottles which are prefilled with liquefied petroleum gas prior to sale, shall be labeled with the weight of the contents.

  29. That’s all folks!

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