FORMAT
BOOKS
PACKAGES
EDITION
PUBLISHER
CONTENT TYPE
Act
Admin Code
Announcements
Bill
Book
CADD File
CAN
CEU
Charter
Checklist
City Code
Code
Commentary
Comprehensive Plan
Conference Paper
County Code
Course
DHS Documents
Document
Errata
Executive Regulation
Federal Guideline
Firm Content
Guideline
Handbook
Interpretation
Journal
Land Use and Development
Law
Legislative Rule
Local Amendment
Local Code
Local Document
Local Regulation
Local Standards
Manual
Model Code
Model Standard
Notice
Ordinance
Other
Paperback
PASS
Periodicals
PIN
Plan
Policy
Product
Program
Provisions
Requirements
Revisions
Rules & Regulations
Standards
State Amendment
State Code
State Manual
State Plan
State Standards
Statute
Study Guide
Supplement
Technical Bulletin
All
|
Description of ASTM-A912 1998ASTM A912-93-Reapproved1998Historical Standard: Standard Test Method for Alternating-Current Magnetic Properties of Amorphous Materials at Power Frequencies Using Wattmeter-Ammeter-Voltmeter Method with Toroidal SpecimensASTM A912Scope 1.1 This test method covers tests for various magnetic properties of amorphous materials at power frequencies (25 to 400 Hz) using a toroidal test transformer. The term toroidal test transformer is used to describe the test device reserving the term specimen to refer to the material used in the test. The test specimen consists of toroidally wound flat strip. 1.2 This test method covers the determination of coreloss, exciting power, rms and peak exciting current, several types of ac permeability, and related properties under ac magnetization at moderate and high inductions at power frequencies (25-70 Hz). 1.3 With proper instrumentation and specimen preparation, this test method is acceptable for measurements at frequencies from 5 Hz to 100 kHz. Proper instrumentation implies that all test instruments have the required frequency band-width. Also see Annex A2. 1.4 This test method also provides procedures for calculating impedance permeability from measured values of rms exciting current and for calculating ac peak permeability from measured peak values of total exciting current at magnetizing forces up to about 10 Oe (796 A/m). 1.5 Explanation of symbols and brief definitions appear in the text of this test method. The official symbols and definitions are listed in Terminology A340. 1.6 This test method shall be used in conjunction with Practice A34. 1.7 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Keywords A-C (alternating-current) magnetic properties; Core loss-alternating-current; Exciting force/power; Impedance permeability; Magnetic properties; Permeability-alternating-current; Specific core loss; Tape wound core; Toroidal transformer; Wave-form distortion; amorphous materials-a-c magnetic properties (at power frequencies 25-400; Hz), using wattmeter-ammeter-voltmeter method with toroidal transformer,; test,; Amorphous magnetic material; amorphous materials-a-c magnetic properties(at power frequencies 25-400; Hz), using wattmeter-ammeter-voltmeter method with toroidal transformer,; test,; Peak permeability; amorphous materials-a-c magnetic properties (at power frequencies 25-400; Hz), using wattmeter-ammeter-voltmeter method with toroidal transformer,; test,;Order Form ICS Code ICS Number Code 77.040.99 (Other methods of testing metals) DOI: 10.1520/A0912-93R98 This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
Some features of MADCAD.com ASTM Standards Subscriptions are: - Immediate Access: As soon as the transaction is completed, your ASTM Standards Subscription will be ready for access.
For any further information on MADCAD.com ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
About ASTMASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide. |
GROUPS
|