Remote Voltage Sensing, 148 | Agilent Technologies E3632A guide

Chapter 7 Tutorial

Connecting the Load

W a r n i n g	To satisfy safety requirements, load wires must be heavy enough not to
	overheat while carrying the short-circuit output current of the power supply.

Remote Voltage Sensing

Normally, a power supply operating in the constant voltage mode achieves its optimum line and load regulations, its lowest output impedance, drift, and ripple and noise, and its fastest transient recovery performance at the power supply output terminals. If the load is separated from the output terminals by any lead length, some of these performance characteristics will be degraded at the load terminals - usually by an amount proportional to the impedance of the load leads compared with the output impedance of the power supply.

With remote voltage sensing, a feature included in the Agilent E3632A power supply, it is possible to connect the input of the voltage feedback amplifier directly to the load terminals so that the regulator performs its function with respect to the load terminals rather than with respect to the power supply output terminals. Thus, the voltage at the power supply output terminals shifts by whatever amount is necessary to compensate for the voltage drop in the load leads, thereby maintaining the voltage at the load terminals constant.

Figure 7-7. Regulated Power Supply with Remote Sensing

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Agilent Technologies E3632A manual Remote Voltage Sensing, Tutorial Connecting the Load R n i n g, 148

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 Accessories Options and AccessoriesGeneral Information Options and Accessories Options General Information Description Description R n i n g General Information Description R n i n g Cooling and Location InstallationInitial Inspection General Information Installation Rack Mounting Page Power-Line Cord Input Power RequirementsPower-Line Voltage Selection General Information Input Power Requirements Panel Power-line module General Information Input Power Requirements Initial Operation Initial Operation Verify that the correct power-line fuse is installed Verify the power-line voltage setting on the rear panelConnect the power-line cord and turn on your power supply Preliminary Checkout Addr 05 or RS-232 Initial Operation Power-On CheckoutEnable the outputs Initial Operation Output Checkout Output CheckoutVoltage Output Checkout Current Output Checkout Turn on the power supplyAdjust the voltage limit value to 1.0 volt T e Initial Operation Output Checkout Front-Panel Operation Front-Panel Operation Front-Panel Operation Front-Panel Operation Overview Front-Panel Operation Overview Adjust the knob for the desired current limit Set the display to the limit modeConstant Voltage Operation Front-Panel Operation Constant Voltage Operation CURRent currentMINMAX Return to the meter modeVOLTage voltageMINMAX OUTPut on Front-Panel Operation Constant Current Operation Adjust the knob for the desired voltage limitConstant Current Operation Verify that the power supply is in the constant current mode Turn on the storage mode Set up the power supply for the desired operating stateStoring and Recalling Operating States Store the operating state in memory location RCL SAV Level 32.0 Setting the OVP Level and Enable the OVP CircuitProgramming Overvoltage Protection Move to the clear mode Ovp on Readjust the OVP trip level or the output voltage levelChecking OVP Operation Clearing the Overvoltage Condition Voltprot voltageMINMAX Clear the overvoltage condition and exit this menuVoltprotstat Offon Voltprotcle Enable the OCP circuit Setting the OCP Level and Enable the OCP CircuitProgramming Overcurrent Protection Front-Panel Operation Programming Overcurrent Protection Move to the clear mode Ocp on Readjust the OCP trip level or the output current levelChecking OCP Operation Clearing the Overcurrent Condition Currprot currentMINMAX Clear the overcurrent condition and exit this menuCurrprotstat Offon Currprotcle CV Regulation Remote Voltage SensingOutput Rating Output Noise Remote Voltage Sensing Connections Stability Outp Offon Disabling the OutputFront-Panel Operation Disabling the Output Knob Locking Disabling the Output Using an External Relay Self-Test System-Related OperationsFront-Panel Operation System-Related Operations TST? ERR Error ConditionsSYSTERR? 113, Undefined header Disp Offon Display ControlDisptextcle Disptext ‘HELLO’ Scpi Language Version Firmware Revision QueryIDN? Returns HEWLETT-PACKARD,E3632A,0,X.X-X.X-X.X SYSTVERS? Remote Interface Selection Remote Interface ConfigurationFront-Panel Operation Remote Interface Configuration Parity Selection RS-232 Gpib AddressBaud Rate Selection RS-232 Gpib To Set the Gpib Address RS-232 To Set the Baud Rate and Parity RS-232Baud Choose the RS-232 interface For one second T e Front-Panel Operation Gpib Interface Configuration Gpib Interface Configuration RS-232 Configuration Overview RS-232 Interface ConfigurationFront-Panel Operation RS-232 Interface Configuration RS-232 Data Frame Format Connection to a Computer or Terminal DTR / DSR Handshake Protocol RS-232 Troubleshooting Front-Panel Operation Calibration Overview Calibration OverviewCalibration Security Calsecstat OFF, HP003632 Code Calsecstat ON, HP003632 ZZ001443 CalseccodeCalsecstat ON, ZZ00143 Calstr ‘CAL 05-1-97’ Calibration CountCalibration Message 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 Using the Low-Level Commands Using the APPLy CommandSimplified Programming Overview ‘‘VOLT Selecting a Trigger Source Reading a Query Response‘‘SYSTERR?’’ ‘‘TRIGSOUR IMM’’ 3RZHU6XSSO\3URJUDPPLQJ5DQJHV Remote Interface Reference Using the APPLy Command Using the APPLy CommandAPPLy voltage DEF MIN MAX,current DEF MIN MAX APPLy? Curr Down Output Setting and Operation CommandsCurr UP CURRentSTEP? DEFault CURRentSTEP numeric valueDEFaultCURRentTRIGgered current MINimum MAXimum CURRentTRIGgered? MINimum MAXimum CURRentPROTectionSTATe 01OFFON CURRentPROTection? MINimumMAXimumCURRentPROTectionSTATe? CURRentPROTectionTRIPped? Volt Down Volt UP VOLTageTRIGgered voltage MINimum MAXimum VOLTageSTEP? DEFaultVOLTageTRIGgered? MINimum MAXimum VOLTagePROTection voltageMINimumMAXimum VOLTagePROTectionSTATe? VOLTagePROTectionSTATe 01OFFONVOLTagePROTectionTRIPped? VOLTagePROTectionCLEar MEASureVOLTage? Remote Interface Reference Triggering Commands Triggering CommandsTrigger Source Choices Bus Software Triggering Trigsour BUS*TRG*WAI*TRG*WAI Trigger 705 group execute triggerImmediate Triggering Trigsour IMM TRG Triggering Commands System-Related Commands SYSTemBEEPer SYSTemERRor?OUTPutRELay? HEWLETT-PACKARD,E3632A,0,X.X-X.X-X.X RST IDN?Curr Currstep Currtrig Currprot Currprotstat Disp Outp RCL 1 2 SAV 1 2 Calibration Commands CALibrationSECureSTATe OFF ON,code CALibrationSECureCODE new codeCALibrationSECureSTATe? CALibrationSTRing quoted string CALibrationVOLTagePROTection RS-232 Interface Commands What is an Enable Register? What is an Event Register?Scpi Status Registers Remote Interface Reference Scpi Status Registers 101 Scpi Status System Questionable Status Register Questionable Status Enable register is cleared whenQuestionable Status Event register is cleared when 102 103 Standard Event Register 104 Standard Event Enable register is cleared whenStatus Byte Register Diihfwlqvwuxphqwwkurxjksxw ‡ RXHHFXWHWKH*CLSFOHDUVWDWXVFRPPDQG‡ RXHHFXWHWKH*SRE 0FRPPDQG To Interrupt Your Bus Controller Using SRQ Using *STB? to Read the Status ByteUsing the Message Available Bit MAV 107 To Determine When a Command Sequence is CompletedUsing *OPC to Signal When Data is in the Output Buffer Remote Interface Reference Status Reporting Commands Status Reporting CommandsSTATusQUEStionableCONDition? STATusQUEStionable? ESE? CLSESR? OPC SRE? PSC?STB? WAI 111 An Introduction to the Scpi Language ‘‘SOURceCURRentTRIGgered’’ ‘‘APPLy 3.5,1.5’’ 112 Command Format Used in This ManualCURRent currentMINimumMAXimumUPDOWN Using the MIN and MAX Parameters Command SeparatorsSourvolt Mincurr MAX Sourvolt MIN Sourcurr MAX Scpi Command Terminators Querying Parameter SettingsIEEE-488.2 Common Commands ‘‘CURR? MAX’’ Curr currentMINMAXUPDOWN Scpi Parameter TypesTrigsour Busimm 115 ‡ 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 Undefined header Program mnemonic too longExample Triggdel Invalid character in number Expression errors Block data errorsInvalid character data Character data too long CALibrationSTRing command Settings conflictToo many errors Data out of range Isolator Uart overrun error Isolator Uart framing errorRS-232 framing error RS-232 overrun error Self-Test Errors Calibration Errors Cal OVP or OCP status enabled Bad DAC DNL error correction dataCal checksum failed, DAC DNL error correction data Bad OVP cal data Application Programs 132 Application Programs C++ Example for Gpibieee ++ Example for GpibieeeDiode.c 133 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 140 141 Overview of Agilent E3632A OperationTutorial Overview of Agilent E3632A Operation 142 143 Output CharacteristicsTutorial Output Characteristics 144 Output Characteristics 145 Unwanted SignalsUnregulated State 146 Tutorial Connecting the Load Connecting the LoadOutput Isolation Multiple Loads 148 Tutorial Connecting the Load R n i n gRemote Voltage Sensing Capacitive Loading Load ConsiderationInductive loading Pulse Loading 150 Tutorial Connecting the Load Reverse Current Loading Series Connections Extending the Voltage and Current RangeParallel Connections Tutorial Extending the Voltage and Current Range 152 Remote ProgrammingTutorial Remote Programming Speed of Response Programming Down 153 154 ReliabilityTutorial Reliability Specifications 156 157 Performance SpecificationsSpecifications Performance Specifications OCP 158 159 Supplemental CharacteristicsSpecifications Supplemental Characteristics 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