PPMS 电导率测试说明书.pdf

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Physical Property Measurement System Resistivity Option User’s Manual Part Number 1076-100A Quantum Design 11578 Sorrento Valley Rd. San Diego, CA 92121-1311 USA Technical support (858) 481-4400 (800) 289-6996 Fax (858) 481-7410 Second edition of manual completed August 1999. Trademarks All product and company names appearing in this manual are trademarks or registered trademarks of their respective holders. U.S. Patents 4,791,788 Method for Obtaining Improved Temperature Regulation When Using Liquid Helium Cooling 4,848,093 Apparatus and Method for Regulating Temperature in a Cryogenic Test Chamber 5,311,125 Magnetic Property Characterization System Employing a Single Sensing Coil Arrangement to Measure AC Susceptibility and DC Moment of a Sample (patent licensed from Lakeshore) 5,647,228 Apparatus and Method for Regulating Temperature in Cryogenic Test Chamber 5,798,641 Torque Magnetometer Utilizing Integrated Piezoresistive Levers Foreign Patents U.K. 9713380.5 Apparatus and Method for Regulating Temperature in Cryogenic Test Chamber C O N T E N T S Table of Contents PREFACE Contents and Conventions vii P.1 Introduction vii P.2 Scope of the Manualvii P.3 Contents of the Manual vii P.4 Conventions in the Manualviii CHAPTER 1 Introduction to the Resistivity Option 1-1 1.1 Introduction 1-1 1.2 Overview of the Resistivity Option 1-1 1.2.1 Advantage of Four-Wire Resistance Measurements 1-2 1.3 Resistivity Option Software1-2 1.3.1 Activating the Resistivity Software 1-2 1.3.2 Resistivity Control Center 1-3 CHAPTER 2 User Bridge Board Operation 2-1 2.1 Introduction 2-1 2.2 Function of the User Bridge Board2-1 2.2.1 Limits and Resolution2-3 2.2.2 Internal Excitation Current


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