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Chapter 7 Tutorial

Connecting the Load

Reverse Current Loading

An active load connected to the supply may actually deliver a reverse current to the supply during a portion of its operating cycle. An external source can not be allowed to pump current into the supply without risking loss of regulation and possible damage. These effects can be avoided by preloading the output with a dummy load resistor. The dummy load resistor should draw at least the same amount of current from the supply as the active load may deliver to the supply. The value of the current for the dummy load plus the value of the current the load draws from the supply must be less than the maximum current of the supply.

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Agilent Technologies E3632A manual Tutorial Connecting the Load Reverse Current Loading, 150

Contents

‹&RS\ULJKW$JLOHQW7HFKQRORJLHV,QF $OO5LJKWV5HVHUYHG 3DUW1XPEHU $SULO Flexible system features Convenient bench-top features Front Panel at a Glance Page T e Front-Panel Voltage and Current Limit Settings OVP Display Annunciators Key to Rear Panel at a Glance This Book Page Contents Contents Remote Interface Reference Error Messages General Information Safety and EMC Requirements Safety Considerations Options Options and AccessoriesAccessories General Information Options and Accessories General Information Description Description R n i n g General Information Description R n i n g Initial Inspection InstallationCooling and Location General Information Installation Rack Mounting Page General Information Input Power Requirements Input Power RequirementsPower-Line Cord Power-Line Voltage Selection Panel Power-line module General Information Input Power Requirements Initial Operation Initial Operation Preliminary Checkout Verify the power-line voltage setting on the rear panelVerify that the correct power-line fuse is installed Connect the power-line cord and turn on your power supply Enable the outputs Initial Operation Power-On CheckoutAddr 05 or RS-232 Voltage Output Checkout Output CheckoutInitial Operation Output Checkout Adjust the voltage limit value to 1.0 volt Turn on the power supplyCurrent Output Checkout T e Initial Operation Output Checkout Front-Panel Operation Front-Panel Operation Front-Panel Operation Front-Panel Operation Overview Front-Panel Operation Overview Front-Panel Operation Constant Voltage Operation Set the display to the limit modeAdjust the knob for the desired current limit Constant Voltage Operation OUTPut on Return to the meter modeCURRent currentMINMAX VOLTage voltageMINMAX Constant Current Operation Adjust the knob for the desired voltage limitFront-Panel Operation Constant Current Operation Verify that the power supply is in the constant current mode Store the operating state in memory location Set up the power supply for the desired operating stateTurn on the storage mode Storing and Recalling Operating States RCL SAV Programming Overvoltage Protection Setting the OVP Level and Enable the OVP CircuitLevel 32.0 Clearing the Overvoltage Condition Readjust the OVP trip level or the output voltage levelMove to the clear mode Ovp on Checking OVP Operation Voltprotcle Clear the overvoltage condition and exit this menuVoltprot voltageMINMAX Voltprotstat Offon Front-Panel Operation Programming Overcurrent Protection Setting the OCP Level and Enable the OCP CircuitEnable the OCP circuit Programming Overcurrent Protection Clearing the Overcurrent Condition Readjust the OCP trip level or the output current levelMove to the clear mode Ocp on Checking OCP Operation Currprotcle Clear the overcurrent condition and exit this menuCurrprot currentMINMAX Currprotstat Offon Output Noise Remote Voltage SensingCV Regulation Output Rating Remote Voltage Sensing Connections Stability Front-Panel Operation Disabling the Output Disabling the OutputOutp Offon Knob Locking Disabling the Output Using an External Relay TST? System-Related OperationsSelf-Test Front-Panel Operation System-Related Operations 113, Undefined header Error ConditionsERR SYSTERR? Disptext ‘HELLO’ Display ControlDisp Offon Disptextcle SYSTVERS? Firmware Revision QueryScpi Language Version IDN? Returns HEWLETT-PACKARD,E3632A,0,X.X-X.X-X.X Front-Panel Operation Remote Interface Configuration Remote Interface ConfigurationRemote Interface Selection Baud Rate Selection RS-232 Gpib AddressParity Selection RS-232 Gpib To Set the Gpib Address Choose the RS-232 interface To Set the Baud Rate and Parity RS-232RS-232 Baud For one second T e Front-Panel Operation Gpib Interface Configuration Gpib Interface Configuration RS-232 Data Frame Format RS-232 Interface ConfigurationRS-232 Configuration Overview Front-Panel Operation RS-232 Interface Configuration Connection to a Computer or Terminal DTR / DSR Handshake Protocol RS-232 Troubleshooting Calibration Security Calibration OverviewFront-Panel Operation Calibration Overview Calsecstat OFF, HP003632 Code Calsecstat ON, HP003632 ON, ZZ00143 CalseccodeZZ001443 Calsecstat Calibration Message Calibration CountCalstr ‘CAL 05-1-97’ Remote Interface Reference Scpi Remote Interface Reference Scpi Command Summary Scpi Command Summary VOLTageDC? System-Related Commands Status Reporting Commands IEEE-488.2 Common Commands ‘‘VOLT Using the APPLy CommandUsing the Low-Level Commands Simplified Programming Overview ‘‘TRIGSOUR IMM’’ Reading a Query ResponseSelecting a Trigger Source ‘‘SYSTERR?’’ 3RZHU6XSSO\3URJUDPPLQJ5DQJHV APPLy? Using the APPLy CommandRemote Interface Reference Using the APPLy Command APPLy voltage DEF MIN MAX,current DEF MIN MAX Curr UP Output Setting and Operation CommandsCurr Down CURRentTRIGgered? MINimum MAXimum CURRentSTEP numeric valueDEFaultCURRentSTEP? DEFault CURRentTRIGgered current MINimum MAXimum CURRentPROTectionTRIPped? CURRentPROTection? MINimumMAXimumCURRentPROTectionSTATe 01OFFON CURRentPROTectionSTATe? Volt Down Volt UP VOLTagePROTection voltageMINimumMAXimum VOLTageSTEP? DEFaultVOLTageTRIGgered voltage MINimum MAXimum VOLTageTRIGgered? MINimum MAXimum VOLTagePROTectionCLEar VOLTagePROTectionSTATe 01OFFONVOLTagePROTectionSTATe? VOLTagePROTectionTRIPped? MEASureVOLTage? Bus Software Triggering Triggering CommandsRemote Interface Reference Triggering Commands Trigger Source Choices Trigsour IMM Trigger 705 group execute triggerTrigsour BUS*TRG*WAI*TRG*WAI Immediate Triggering TRG Triggering Commands System-Related Commands OUTPutRELay? SYSTemERRor?SYSTemBEEPer Currtrig Currprot Currprotstat Disp Outp IDN?HEWLETT-PACKARD,E3632A,0,X.X-X.X-X.X RST Curr Currstep RCL 1 2 SAV 1 2 Calibration Commands CALibrationSTRing quoted string CALibrationSECureCODE new codeCALibrationSECureSTATe OFF ON,code CALibrationSECureSTATe? CALibrationVOLTagePROTection RS-232 Interface Commands Remote Interface Reference Scpi Status Registers What is an Event Register?What is an Enable Register? Scpi Status Registers 101 Scpi Status System 102 Questionable Status Enable register is cleared whenQuestionable Status Register Questionable Status Event register is cleared when 103 Standard Event Register Status Byte Register Standard Event Enable register is cleared when104 ‡ RXHHFXWHWKH*SRE 0FRPPDQG ‡ RXHHFXWHWKH*CLSFOHDUVWDWXVFRPPDQGDiihfwlqvwuxphqwwkurxjksxw Using the Message Available Bit MAV Using *STB? to Read the Status ByteTo Interrupt Your Bus Controller Using SRQ Using *OPC to Signal When Data is in the Output Buffer To Determine When a Command Sequence is Completed107 STATusQUEStionable? Status Reporting CommandsRemote Interface Reference Status Reporting Commands STATusQUEStionableCONDition? OPC CLSESE? ESR? WAI PSC?SRE? STB? 111 An Introduction to the Scpi Language CURRent currentMINimumMAXimumUPDOWN Command Format Used in This Manual‘‘SOURceCURRentTRIGgered’’ ‘‘APPLy 3.5,1.5’’ 112 Sourvolt MIN Sourcurr MAX Command SeparatorsUsing the MIN and MAX Parameters Sourvolt Mincurr MAX ‘‘CURR? MAX’’ Querying Parameter SettingsScpi Command Terminators IEEE-488.2 Common Commands 115 Scpi Parameter TypesCurr currentMINMAXUPDOWN Trigsour Busimm ‡ 7KHSRZHUVXSSO\ªVLQSXWDQGRXWSXWEXIIHUVDUHFOHDUHG Halting an Output in Progress RQILUPHG&RPPDQGV Scpi Conformance Information SOURce VOLTageLEVelIMMediateAMPLitude voltageMINMAXUPDOWN 118 HYLFH6SHFLILF&RPPDQGV IEEE-488 Conformance Information Error Messages 113, Undefined header 122 Error Appl Execution Errors Invalid character in number Program mnemonic too longUndefined header Example Triggdel Character data too long Block data errorsExpression errors Invalid character data Data out of range Settings conflictCALibrationSTRing command Too many errors RS-232 overrun error Isolator Uart framing errorIsolator Uart overrun error RS-232 framing error Self-Test Errors Calibration Errors Bad OVP cal data Bad DAC DNL error correction dataCal OVP or OCP status enabled Cal checksum failed, DAC DNL error correction data Application Programs 132 133 ++ Example for GpibieeeApplication Programs C++ Example for Gpibieee Diode.c End of Program 134 Application Programs ++ Example for Gpibieee 135 Excel 5.0 Example for Windows 3.1 and Gpib 136 Visuccess 137 End of Program 138 Tutorial 140 Tutorial Overview of Agilent E3632A Operation Overview of Agilent E3632A Operation141 142 Tutorial Output Characteristics Output Characteristics143 144 Output Characteristics Unregulated State Unwanted Signals145 146 Multiple Loads Connecting the LoadTutorial Connecting the Load Output Isolation Remote Voltage Sensing Tutorial Connecting the Load R n i n g148 Pulse Loading Load ConsiderationCapacitive Loading Inductive loading 150 Tutorial Connecting the Load Reverse Current Loading Tutorial Extending the Voltage and Current Range Extending the Voltage and Current RangeSeries Connections Parallel Connections Tutorial Remote Programming Remote Programming152 Speed of Response Programming Down 153 Tutorial Reliability Reliability154 Specifications 156 Specifications Performance Specifications Performance Specifications157 OCP 158 Specifications Supplemental Characteristics Supplemental Characteristics159 160 161 Dimensions of Agilent E3632A Power Supply Specifications Supplemental Characteristics 162 163 Index 164 165 166 Warranty According to ISO/IEC Guide 22 and EN Declaration of Conformity