The purpose of this document is to review magnetic inductive flowmeter (magmeter) principles of operation, calibration, and selection. Magnetic inductive flowmeters or electromagnetic flowmeters are commonly called magmeters. The flowmeter referenced in this standard will be called a magmeter or magnetic flowmeter interchangeably. Magmeters are available in wafer style and threaded and flanged-end connection designs. These spool\/tube design flowmeters are most commonly used in the water industry. This standard will focus on magmeters of this design. This standard does not apply to the insertion type of magmeter. This standard does not address specific issues where a magmeter would be used in revenue service.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 7<\/td>\n | Foreword I.\tIntroduction. I.A.\tBackground.\u2003The first water meter that was produced in the United States was thought to be a positive displacement meter that was fabricated in 1857. Since then, a number of other technologies and designs have been introduced to the water industry, e I.B.\tHistory.\u2003In 2007, the AWWA Standards Subcommittee on Magnetic Devices, a subcommittee of the AWWA Standards Committee on Rate Type Flowmeters, completed a Committee Report on Magnetic Inductive Flowmeters. The report was published in the June 2007 is I.C.\tAcceptance.\u2003In May 1985, the US Environmental Protection Agency (USEPA) entered into a cooperative agreement with a consortium led by NSF International (NSF) to develop voluntary third-party consensus standards and a certification program for direct <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | II.\tSpecial Issues.\u2003This standard is different in format from other AWWA standards that contain specific requirements for material, dimensions, workmanship, and other physical requirements. Different magnetic inductive flowmeters employ different material II.A.\tChlorine and Chloramine Degradation of Elastomers.\u2003The selection of materials is critical for water service and distribution piping in locations where there is a possibility that elastomers will be in contact with chlorine or chloramines. Documented <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | III.\tUse of This Standard.\u2003It is the responsibility of the user of an AWWA standard to determine that the products described in that standard are suitable for use in the particular application being considered. III.A.\tPurchaser Options and Alternatives.\u2003The following information should be provided by the purchaser: III.B.\tModification to Standard.\u2003Any modification to the provisions, definitions, or terminology in this standard must be provided by the purchaser. IV.\tMajor Revisions.\u2003Major revisions made to the standard in this edition include the following: <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | AWWA Standard SECTION 1:\tGENERAL Sec. 1.1\tScope Sec. 1.2\tPurpose Sec. 1.3\tApplication <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | SECTION 2:\tREFERENCES SECTION 3:\tDEFINITIONS <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | SECTION 4:\tREQUIREMENTS Sec. 4.1\tMaterials Sec. 4.2\tPrinciples of Operation <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | Sec. 4.3\tFlowmeter Components <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | Sec. 4.4\tPerformance Issues <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | Sec. 4.5\tImpacts on Performance <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | SECTION 5:\tVERIFICATION Sec. 5.1\tCalibration Methods <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | Sec. 5.2\tField-Verification Techniques Sec. 5.3\tCalibration Traceability <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | Sec. 6.2\tAffidavit of Compliance <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | Purchaser Options <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" AWWA C751-19(R23) Magnetic Inductive Flowmeters<\/b><\/p>\n |