Programming Overcurrent Protection | Agilent Technologies E3632A

Chapter 3 Front-Panel Operation

Programming Overcurrent Protection

Power

Output On/Off

Over Current

Programming Overcurrent Protection

Overcurrent protection guards the load against output currents that reach a specified value greater than the programmed protection level. It is accomplished by programming the output current to zero.

The following steps show how to set the overcurrent protection trip level, how to check OCP operation and how to clear overcurrent condition.

• Front-panel operation:

Setting the OCP Level and Enable the OCP Circuit

1Turn on the power supply.

The power supply will go into the power-on / reset state; the output is disabled (the OFF annunciator turns on); the 15V/7A range is selected (the 15V annunciator turns on); and the knob is selected for voltage control.

2Enable the output.

The OFF annunciator turns off and the display will go to the meter mode.

3Enter the OCP menu and set the trip level.

LEVEL 7.5 A

3

Over Current

You will see the above message on the display when you enter the OCP menu. Adjust the knob for the desired OCP trip level.

4Enable the OCP circuit.

OCP ON

You will see the above message after pressing the Over Current key.

45

Image 46

Agilent Technologies E3632A manual Programming Overcurrent Protection, Setting the OCP Level and Enable the OCP Circuit

Contents

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