Programming Overvoltage Protection | Agilent Technologies E3634A

Power

Output On/Off

Over Voltage

Over Voltage

Chapter 3 Front-Panel Operation

Programming Overvoltage Protection

Programming Overvoltage Protection

Overvoltage protection guards the load against output voltages that reach a specified value greater than the programmed protection level. It is accomplished by shorting the output via an internal SCR when the trip level is set to equal or greater than 3 volts, or by progamming the output to 1 volt when the trip level is set to less than 3 volts.

The following steps show how to set the OVP trip level, how to check OVP operation, and how to clear overvoltage condition.

• Front-panel operation:

Setting the OVP Level and Enable the OVP 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 8V/20A* or 25V/7A** range is selected (the 8V* or 25V** 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 OVP menu and set the trip level.

LEVEL 22.0V (E3633A)

LEVEL 55.0V (E3634A)

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

Note that you cannot set the trip levels to lower than 1.0 volt.

4Enable the OVP circuit.

OVP ON

You will see the above message after pressing OverVoltage key.

*For Agilent E3633A Model **For Agilent E3634A Model

42

Image 43

Agilent Technologies E3634A, E3633A Programming Overvoltage Protection, Setting the OVP Level and Enable the OVP Circuit

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 General Information Input Power Requirements Input Power RequirementsPower-Line Cord Power-Line Voltage Selection General Information Input Power Requirements General Information Input Power Requirements Initial Operation Initial Operation Preliminary Checkout Addr 05 or RS-232 Power-On CheckoutInitial Operation Power-On Checkout Enable the outputs Initial Operation Output Checkout Turn on the power supplyOutput Checkout Voltage 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 Front-Panel Operation Constant Voltage Operation Set the display to the limit modeAdjust the knob for the desired current limit Constant Voltage Operation VOLTage voltageMINMAX Adjust the knob for the desired output voltageReturn to the meter mode CURRent currentMINMAX Front-Panel Operation Constant Current Operation Constant Current Operation Adjust the knob for the desired output current 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 Recall the stored operating state Turn on the recall modeRestore the operating state Save the operating state Front-Panel Operation Programming Overvoltage Protection Setting the OVP Level and Enable the OVP CircuitEnable the OVP circuit Programming Overvoltage Protection Lower the output voltage level Move to the clear modeChecking OVP Operation Clearing the Overvoltage Condition Voltprotstat Offon Move to the OVP Clear modeRaise the OVP trip level Voltprot voltageMINMAX Recommended Protection Circuit for Battery Charging 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 Checking OCP OperationLower the output current level Currprotstat Offon Move to the OCP Clear modeRaise the OCP trip level Currprot currentMINMAX 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 TST? System-Related OperationsSelf-Test Front-Panel Operation System-Related Operations 102, ‘‘Syntax error’’ Error Conditions Disptextcle Display ControlDisp Offon Disptext quoted string 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 To Set the Gpib Address Turn on the remote configuration modeMove to the Gpib address setting mode Save the change and turn off the I/O configuration mode Save the change and choose the parity To Set the Baud Rate and Parity RS-232RS-232 message will be displayed Choose the RS-232 interface Change Saved T e Front-Panel Operation Gpib Interface Configuration Gpib Interface Configuration Parity and Data Bits None / 8 data bits factory setting 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 Secured Unsecured ‘‘CALSECSTAT ON, ZZ001443 ’’ Calseccode new code‘‘CALSECSTAT OFF, HP003633* or HP003634** ’’ ‘‘CALSECCODE ZZ001443 ’’ Calstr quoted string Calibration CountCalibration Message CALCOUN? 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 ‘‘VOLT Using the APPLy CommandUsing the Low-Level Commands Simplified Programming Overview Selecting a Trigger Source Reading a Query Response‘‘TRIGSOUR IMM ’’ Agilent E3633A Programming Ranges Power Supply Programming Ranges 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 Commands‘‘CURR DOWN’’ CURRentTRIGgered? MINimum MAXimum CURRentSTEP numeric valueDEFaultCURRentSTEP? DEFault CURRentTRIGgered current MINimum MAXimum CURRentPROTectionTRIPped? CURRentPROTection? MINimumMAXimumCURRentPROTectionSTATe 01OFFON CURRentPROTectionSTATe? ‘‘VOLT Down ’’ ‘‘VOLTSTEP 0.01 ’’‘‘VOLT UP ’’ ‘‘VOLTSTEP 0.02 ’’ VOLTagePROTection voltageMINimumMAXimum VOLTageSTEP? DEFaultVOLTageTRIGgered voltage MINimum MAXimum VOLTageTRIGgered? MINimum MAXimum VOLTagePROTectionCLEar VOLTagePROTectionSTATe 01OFFONVOLTagePROTectionSTATe? VOLTagePROTectionTRIPped? MEASureVOLTage? MEASureCURRent? Bus Software Triggering Triggering CommandsRemote Interface Reference Triggering Commands Trigger Source Choices Immediate Triggering Trigsour BUS*TRG*WAI*TRG*WAITrigsour IMM TRG Triggering Commands System-Related Commands OUTPutRELay? Outprel command SYSTemBEEPerSYSTemERRor? +0, ‘‘No error’’ Currstep IDN?RST Curr VOLTSTEP, VOLTTRIG, VOLTPROT, VOLTPROTSTAT, SAV 1 2CURR, CURRSTEP, CURRTRIG, CURRPROT, Currprotstat DISP, OUTP, OUTPREL, TRIGDEL, TRIGSOUR, Volt Calibration Commands CALibrationSTRing quoted string CALibrationSECureCODE new codeCALibrationSECureSTATe OFF ON,code CALibrationSECureSTATe? 100 CALibrationVOLTagePROTection Ctrl-C RS-232 Interface CommandsRemote Interface Reference RS-232 Interface Commands SYSTemREMote Remote Interface Reference Scpi Status Registers What is an Event Register?What is an Enable Register? Scpi Status Registers 103 Scpi Status System 104 Questionable Status Enable register is cleared whenQuestionable Status Register Questionable Status Event register is cleared when 105 Standard Event Register Status Byte Register Standard Event Enable register is cleared when106 U t i o n Using Service Request SRQ and Serial PollStatus Byte Enable register Request Service is cleared when Causing the service request Clear Using *STB? to Read the Status ByteUsing the Message Available Bit MAV To Interrupt Your Bus Controller Using SRQ Using *OPC to Signal When Data is in the Output Buffer To Determine When a Command Sequence is Completed109 STATusQUEStionable? Status Reporting CommandsRemote Interface Reference Status Reporting Commands STATusQUEStionableCONDition? OPC CLSESE? ESR? WAI PSC?SRE? STB? 113 An Introduction to the Scpi Language CURRent currentMINimumMAXimumUPDOWN Command Format Used in This Manual‘‘SOURceCURRentTRIGgered’’ ‘‘APPLy 3.5,1.5’’ 114 ‘‘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 117 Scpi Parameter TypesCurr currentMINMAXUPDOWN Trigsour Busimm 118 Halting an Output in ProgressClear Ioclear 119 Scpi Confirmed CommandsScpi Conformance Information Remote Interface Reference Scpi Conformance Information 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 *ESE #B01010102 113 Undefined headerExample Triggdel 121 Invalid character in number 144 Character data too long Error Messages Execution Errors 141 Invalid character data160 to Block data errors 170 to Expression errors 350 Too many errors Error Messages Execution Errors 221 Settings conflictCALibrationSTRing command Reported. See also ‘‘Self-Test Errors’’, starting on SYSTemLOCal , SYSTem REMote , and SYSTemRWLock Error Messages Execution Errors 430 Query Deadlocked440 Query Unterminated after indefinite response Example *IDN?SYSTVERS? Error Messages Self-Test Errors Self-Test Errors Calibration Errors 718 Gain out of range for Gain Error Correction Error Messages Calibration Errors 714 Bad OVP cal data716 Bad DAC DNL error correction data 717 Cal OVP or OCP status enabled Application Programs 134 On next 135 Example Program for C and C++Application Programs Example Program for C and C++ Diode.c On next 136 On next 137 End of Program 138 Program result Example Program for ExcelApplication Programs Example Program for Excel Example 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 Multiple Loads Connecting the LoadR n i n g Tutorial Connecting the Load Output Isolation Remote Voltage Sensing Tutorial Connecting the Load154 Pulse Loading Load ConsiderationCapacitive Loading Inductive loading 156 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 Programming158 Speed of Response Programming Down 159 Tutorial Reliability Reliability160 Specifications 162 Specifications Performance Specifications Performance Specifications163 164 OCP Supplemental Characteristics State Storage Memory Maximum Input PowerOperating Temperature Programming Language 167 DimensionsWeight Environmental Conditions Specifications Supplemental Characteristics 168 169 Index Gpib 170 Scpi 171 172 Warranty According to ISO/IEC Guide 22 and EN Declaration of Conformity