156 | Agilent Technologies E3634A, E3633A specification

Chapter 7 Tutorial

Connecting the Load

Reverse Current Loading

An active load connected to the power 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 E3634A, E3633A manual Tutorial Connecting the Load Reverse Current Loading, 156

Contents

‹&RS\ULJKW$JLOHQW7HFKQRORJLHV,QF $OO5LJKWV5HVHUYHG 3DUW1XPEHU $SULO Flexible system features Convenient bench-top features Front Panel at a Glance For Agilent E3633A Model **For Agilent E3634A Model Front-Panel Voltage and Current Limit Settings Display Annunciators Rear Panel at a Glance This Book Page Contents Remote Interface Reference Contents Application Programs Error MessagesTutorial Specifications General Information Safety and EMC Requirements Safety Considerations Accessories Options and AccessoriesOptions 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 Power-Line Cord Input Power RequirementsPower-Line Voltage Selection General Information Input Power Requirements General Information Input Power Requirements General Information Input Power Requirements Initial Operation Initial Operation Preliminary Checkout Initial Operation Power-On Checkout Power-On CheckoutEnable the outputs Addr 05 or RS-232 Output Checkout Turn on the power supplyVoltage Output Checkout Initial Operation Output Checkout Adjust the voltage limit value to 1.0 volt Enable the outputCurrent Output Checkout Chapter 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 Return to the meter mode Adjust the knob for the desired output voltageCURRent currentMINMAX VOLTage voltageMINMAX Front-Panel Operation Constant Current Operation Constant Current Operation Adjust the knob for the desired output current 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 Restore the operating state Turn on the recall modeSave the operating state Recall the stored operating state Enable the OVP circuit Setting the OVP Level and Enable the OVP CircuitProgramming Overvoltage Protection Front-Panel Operation Programming Overvoltage Protection Checking OVP Operation Move to the clear modeClearing the Overvoltage Condition Lower the output voltage level Raise the OVP trip level Move to the OVP Clear modeVoltprot voltageMINMAX Voltprotstat Offon Recommended Protection Circuit for Battery Charging Enable the OCP circuit Setting the OCP Level and Enable the OCP CircuitProgramming Overcurrent Protection Front-Panel Operation Programming Overcurrent Protection Clearing the Overcurrent Condition Checking OCP OperationLower the output current level Raise the OCP trip level Move to the OCP Clear modeCurrprot currentMINMAX Currprotstat Offon Output Rating CV RegulationOutput Noise Remote Voltage Sensing Connections Stability Rear local sensing connections Remote Voltage Sensing at the Rear Panel Front-Panel Operation Disabling the Output Disabling the OutputOutp Offon Knob Locking Disabling the Output Using an External Relay Self-Test System-Related OperationsFront-Panel Operation System-Related Operations TST? 102, ‘‘Syntax error’’ Error Conditions Disp Offon Display ControlDisptext quoted string Disptextcle Scpi Language Version Firmware Revision QuerySYSTVERS? Front-Panel Operation Remote Interface Configuration Remote Interface ConfigurationRemote Interface Selection Baud Rate Selection RS-232 Gpib AddressParity Selection RS-232 Move to the Gpib address setting mode Turn on the remote configuration modeSave the change and turn off the I/O configuration mode To Set the Gpib Address RS-232 message will be displayed To Set the Baud Rate and Parity RS-232Choose the RS-232 interface Save the change and choose the parity Change Saved 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 Parity and Data Bits None / 8 data bits factory setting Connection to a Computer or Terminal DTR / DSR Handshake Protocol RS-232 Troubleshooting Calibration Security Calibration OverviewFront-Panel Operation Calibration Overview Secured Unsecured ‘‘CALSECSTAT OFF, HP003633* or HP003634** ’’ Calseccode new code‘‘CALSECCODE ZZ001443 ’’ ‘‘CALSECSTAT ON, ZZ001443 ’’ Calibration Message Calibration CountCALCOUN? Calstr quoted string Remote Interface Reference Scpi Remote Interface Reference Scpi Command Summary Scpi Command SummaryScpi First-time Scpi users, see Numeric value DEFault 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‘‘TRIGSOUR IMM ’’ Agilent E3633A Programming Ranges Power Supply Programming Ranges Remote Interface Reference Using the APPLy Command Using the APPLy CommandAPPLy voltage DEF MIN MAX,current DEF MIN MAX APPLy? ‘‘CURR UP’’ Output Setting and Operation Commands‘‘CURR DOWN’’ CURRentSTEP? DEFault CURRentSTEP numeric valueDEFaultCURRentTRIGgered current MINimum MAXimum CURRentTRIGgered? MINimum MAXimum CURRentPROTectionSTATe 01OFFON CURRentPROTection? MINimumMAXimumCURRentPROTectionSTATe? CURRentPROTectionTRIPped? ‘‘VOLT UP ’’ ‘‘VOLTSTEP 0.01 ’’‘‘VOLTSTEP 0.02 ’’ ‘‘VOLT Down ’’ VOLTageTRIGgered voltage MINimum MAXimum VOLTageSTEP? DEFaultVOLTageTRIGgered? MINimum MAXimum VOLTagePROTection voltageMINimumMAXimum VOLTagePROTectionSTATe? VOLTagePROTectionSTATe 01OFFONVOLTagePROTectionTRIPped? VOLTagePROTectionCLEar MEASureVOLTage? MEASureCURRent? Remote Interface Reference Triggering Commands Triggering CommandsTrigger Source Choices Bus Software Triggering Immediate Triggering Trigsour BUS*TRG*WAI*TRG*WAITrigsour IMM TRG Triggering Commands System-Related Commands SYSTemERRor? Outprel command SYSTemBEEPer+0, ‘‘No error’’ OUTPutRELay? RST IDN?Curr Currstep CURR, CURRSTEP, CURRTRIG, CURRPROT, Currprotstat SAV 1 2DISP, OUTP, OUTPREL, TRIGDEL, TRIGSOUR, Volt VOLTSTEP, VOLTTRIG, VOLTPROT, VOLTPROTSTAT, Calibration Commands CALibrationSECureSTATe OFF ON,code CALibrationSECureCODE new codeCALibrationSECureSTATe? CALibrationSTRing quoted string 100 CALibrationVOLTagePROTection Remote Interface Reference RS-232 Interface Commands RS-232 Interface CommandsSYSTemREMote Ctrl-C What is an Enable Register? What is an Event Register?Scpi Status Registers Remote Interface Reference Scpi Status Registers 103 Scpi Status System Questionable Status Register Questionable Status Enable register is cleared whenQuestionable Status Event register is cleared when 104 105 Standard Event Register Status Byte Register Standard Event Enable register is cleared when106 Status Byte Enable register Request Service is cleared when Using Service Request SRQ and Serial PollCausing the service request U t i o n Using the Message Available Bit MAV Using *STB? to Read the Status ByteTo Interrupt Your Bus Controller Using SRQ Clear Using *OPC to Signal When Data is in the Output Buffer To Determine When a Command Sequence is Completed109 Remote Interface Reference Status Reporting Commands Status Reporting CommandsSTATusQUEStionableCONDition? STATusQUEStionable? ESE? CLSESR? OPC SRE? PSC?STB? WAI 113 An Introduction to the Scpi Language CURRent currentMINimumMAXimumUPDOWN Command Format Used in This Manual‘‘SOURceCURRentTRIGgered’’ ‘‘APPLy 3.5,1.5’’ 114 Using the MIN and MAX Parameters Command Separators‘‘SOURVOLT Mincurr MAX’’ ‘‘SOURVOLT MIN’’ ‘‘SOURCURR MAX’’ Scpi Command Terminators Querying Parameter SettingsIEEE-488.2 Common Commands ‘‘CURR? MAX’’ Curr currentMINMAXUPDOWN Scpi Parameter TypesTrigsour Busimm 117 Clear Halting an Output in ProgressIoclear 118 Scpi Conformance Information Scpi Confirmed CommandsRemote Interface Reference Scpi Conformance Information 119 SOURce VOLTageLEVelIMMediateAMPLitude voltageMINMAXUPDOWN 120 121 Non-SCPI Commands IEEE-488 Conformance Information Error Messages 102, ‘‘Syntax error’’ 124 *RST reset command command does not clear the error queue Execution Errors Example Triggdel 113 Undefined header121 Invalid character in number Example *ESE #B01010102 160 to Block data errors Error Messages Execution Errors 141 Invalid character data170 to Expression errors 144 Character data too long CALibrationSTRing command Error Messages Execution Errors 221 Settings conflictReported. See also ‘‘Self-Test Errors’’, starting on 350 Too many errors 440 Query Unterminated after indefinite response Error Messages Execution Errors 430 Query DeadlockedExample *IDN?SYSTVERS? SYSTemLOCal , SYSTem REMote , and SYSTemRWLock Error Messages Self-Test Errors Self-Test Errors Calibration Errors 716 Bad DAC DNL error correction data Error Messages Calibration Errors 714 Bad OVP cal data717 Cal OVP or OCP status enabled 718 Gain out of range for Gain Error Correction Application Programs 134 Application Programs Example Program for C and C++ Example Program for C and C++Diode.c On next 135 On next 136 On next 137 End of Program 138 Application Programs Example Program for Excel Example Program for ExcelExample Program result 140 On next 141 Application Programs Example Program for Excel Diode Macro End of Program 142 143 Declaration for Windows 95/NT Application Programs Example Program for Excel 144 Tutorial 146 147 Overview of Agilent E3633A and Agilent E3634A Operation RS-232 Gpib148 Tutorial Output Characteristics Output Characteristics149 150 Output Characteristics Unregulated State Unwanted Signals151 152 R n i n g Tutorial Connecting the Load Connecting the LoadOutput Isolation Multiple Loads Remote Voltage Sensing Tutorial Connecting the Load154 Capacitive Loading Load ConsiderationInductive loading Pulse Loading 156 Tutorial Connecting the Load Reverse Current Loading Series Connections Extending the Voltage and Current RangeParallel Connections Tutorial Extending the Voltage and Current Range Tutorial Remote Programming Remote Programming158 Speed of Response Programming Down 159 Tutorial Reliability Reliability160 Specifications 162 Specifications Performance Specifications Performance Specifications163 164 OCP Supplemental Characteristics Operating Temperature Maximum Input PowerProgramming Language State Storage Memory Weight DimensionsEnvironmental Conditions 167 Specifications Supplemental Characteristics 168 169 Index Gpib 170 Scpi 171 172 Warranty According to ISO/IEC Guide 22 and EN Declaration of Conformity