Voltprot voltageMINMAX, Voltprotcle | Agilent Technologies E3632A

Chapter 3 Front-Panel Operation

Programming Overvoltage Protection

Over Voltage

3Clear the overvoltage condition and exit this menu.

Now, when you press Over Voltage key again, the “DONE” message is displayed for a second and the OVP annunciator will not blink any more. The output will return to meter mode.

•Remote interface operation:

	VOLT:PROT {<voltage>MINMAX}	Set the OVP level
	VOLT:PROT:STAT {OFFON)	Disable or enable the OVP circuit
	VOLT:PROT:CLE	Clear the tripped OVP circuit

N o t e	The power supply’s OVP circuit contains a crowbar SCR, which effectively
	shorts the output of the power supply whenever the overvoltage condition
	occurs. If external voltage source such as a battery is connected across the

output, and the overvoltage condition inadvertently occurs, the SCR will continuously sink a large current from the source; possibly damaging the power supply. To avoid this a diode must be connected in series with the output as shown below.

Figure 3-1. Recommended Protection Circuit for Battery Charging

44

Image 45

Agilent Technologies E3632A Clear the overvoltage condition and exit this menu, Voltprot voltageMINMAX, Voltprotstat Offon

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 Installation Initial InspectionCooling and Location 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 Initial Operation Power-On Checkout Enable the outputsAddr 05 or RS-232 Output Checkout Voltage Output CheckoutInitial Operation Output Checkout Turn on the power supply Adjust the voltage limit value to 1.0 voltCurrent 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 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 Adjust the knob for the desired voltage limit Constant Current OperationFront-Panel Operation Constant 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 Setting the OVP Level and Enable the OVP Circuit Programming Overvoltage ProtectionLevel 32.0 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 Disabling the Output Front-Panel Operation Disabling the OutputOutp Offon 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 Configuration Front-Panel Operation Remote Interface ConfigurationRemote Interface Selection Gpib Address Baud Rate Selection RS-232Parity 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 Calibration Overview Calibration SecurityFront-Panel Operation Calibration Overview Calsecstat OFF, HP003632 Code Calsecstat ON, HP003632 ZZ001443 CalseccodeCalsecstat ON, ZZ00143 Calibration Count Calibration MessageCalstr ‘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 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? Output Setting and Operation Commands Curr UPCurr Down 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 SYSTemERRor? OUTPutRELay?SYSTemBEEPer 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 Standard Event Enable register is cleared when Status Byte Register104 ‡ RXHHFXWHWKH*CLSFOHDUVWDWXVFRPPDQG ‡ RXHHFXWHWKH*SRE 0FRPPDQGDiihfwlqvwuxphqwwkurxjksxw Using *STB? to Read the Status Byte Using the Message Available Bit MAVTo Interrupt Your Bus Controller Using SRQ To Determine When a Command Sequence is Completed Using *OPC to Signal When Data is in the Output Buffer107 Remote Interface Reference Status Reporting Commands Status Reporting CommandsSTATusQUEStionableCONDition? STATusQUEStionable? ESE? CLSESR? OPC SRE? PSC?STB? WAI 111 An Introduction to the Scpi Language Command Format Used in This Manual CURRent currentMINimumMAXimumUPDOWN‘‘SOURceCURRentTRIGgered’’ ‘‘APPLy 3.5,1.5’’ 112 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 Overview of Agilent E3632A Operation Tutorial Overview of Agilent E3632A Operation141 142 Output Characteristics Tutorial Output Characteristics143 144 Output Characteristics Unwanted Signals Unregulated State145 146 Tutorial Connecting the Load Connecting the LoadOutput Isolation Multiple Loads Tutorial Connecting the Load R n i n g Remote Voltage Sensing148 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 Remote Programming Tutorial Remote Programming152 Speed of Response Programming Down 153 Reliability Tutorial Reliability154 Specifications 156 Performance Specifications Specifications Performance Specifications157 OCP 158 Supplemental Characteristics Specifications 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