User ManualTable of Contents5725A Instruction Manual1Table of Contents3List of Tables7List of Figures9Interference Information11Declaration of the Manufacturer or Importer11Bescheinigung des Herstellers/Importeurs11Safety13OPERATOR SAFETY SUMMARY13Terms in this Manual13Symbols Marked on Equipment14Power Source14Use the Proper Fuse14Grounding the 5725A14Use the Proper Power Cord14Do Not Operate in Explosive Atmospheres14Do Not Remove Cover14Do Not Attempt to Operate if Protection May be Impaired14SERVICING SAFETY SUMMANY15Do Not Service Alone15Use Care When Servicing With Power On15FIRST AID FOR ELECTRIC SHOCK16Free the Victim From the Live Conductor16Get Help!16Never Accept Ordinary and General Tests for Death16Treat the Victim161. Introduction and Specifications17Introduction19Where to Go From Here20How to Use the Manuals215725A Instruction Manual215700A Operator Manual215700A Operator Reference Guide215700A Remote Programming Reference Guide215700A Service Manual22Specifications22DC Voltage23AC Voltage24Resistance27Current Derating Factors28DC Current29AC Current30Wideband AC Voltage (Option -03)32General Specifications:332. Installation35Introduction37Unpacking and Inspection37Service Information39Placement and Rack Mounting39Cooling Considerations39Connecting to the 5700A Calibrator40Selecting Line Voltage41Accessing the Fuse42Connecting to Line Power433. Operating Notes45Introduction47Front Panel Features48Rear Panel Features50Turning on the 5725A Amplifier52Warm Up525725A Operating Functions and Modes53Standby53Voltage Standby54Current Standby55Voltage Operate56Current Operate57Conditions That Activate the 5725A584. Theory of Operation59Introduction61Overall Functional Description611100V AC Range Functional Description6311A Range Functional Description64Operation in the 11A DC Range65Operation in the 11A AC Range65Voltage and Current Standby Modes65Voltage Standby65Current Standby65How the 5700A and 5725A Communicate66Description of the Out-Guard Lines (5725A Side)66Description of the In-Guard Lines67Functional Summaries by Assembly68Detailed Circuit Description69Interconnect Assembly (A1)69Power Supply Assembly (A4)70High Voltage Supply Section71Switching Section72Current-Limit Section73System Supply Section73Fan Supply Section74Digital Assembly (A5)74Microcomputer74External RAM74External ROM74EEROM76Data Latch76Strobe Lines76Led Driver76Optoisolator Link76Break-Detect Circuitry77Power Up and Reset Circuitry77Watchdog Timer77Current Amplifier Assembly (A2)77Error Amplifier Section79Output Stage Section80Monitor Section80Control and Switching Section81Power Supply Section81High Voltage Amplifier (A3)82Input Amplifier82Integrator84Window Comparator84Input Clamp84Transconductance and Cascode Stage85Midstage85Midstage -400V Filter85High Voltage Heat Sink Assemblies85Autobias Current Source86Autobias Sense Circuit86High Voltage Sense Assembly (A6)885. Calibration and Verification97Introduction99Where to Find Further Information996. Maintenance101Introduction103Replacing the Fuse103Cleaning the Air Filter104General Cleaning105Cleaning PCA's105Access Procedures106Initial Access Procedure 6-7.107Accessing the Power Supply Assembly (A4) 6-8.109Accessing the Digital Assembly (A5) 6-9.109Accessing the Current Amplifier Assembly (A2) 6-10.111Accessing the High Voltage Amplifier (A3) 6-11.112Accessing the High Voltage Sense Assembly (A6) 6-12.113Accessing the High Voltage Output Transistors 6-13.114Accessing the Interconnect Assembly (A1) 6-14.114Enabling Front or Rear Binding Posts1157. Troubleshooting117Introduction1195725A Fault Codes119Self Diagnostics119Manual Tests for Fault Isolation122Problems 1 or 2: Fault at Power-Up or When Entering Voltage Standby123Problem 3: Fault When Entering Voltage Operate124Problem 4: Fault When Entering Current Standby124Problem 5: Fault When Entering Current Operate124Reduced-Voltage Troubleshooting Mode124Testing the Power Supply By Itself1258. List of Replaceable Parts127Introduction129How to Obtain Parts129Manual Status Information129Newer Instruments129Service Centers1309. Schematic Diagrams167Index191Size: 35.7 MBPages: 196Language: EnglishOpen manual
