Inductive Loads, Battery Charging | Agilent Technologies E4356A

Output Safety Cover	 Analog Connector		– Output Bus Bar
 – Local Sense Terminal	 + Local Sense Terminal		+ Output Bus Bar
 Signal Common	 Local Sense Jumpers		 Rear Knockouts
 Bottom Knockout
Insert screwdriver blade in slot and pry out		Bend along joint and break off

WARNING

DO NOT LEAVE UNCOVERED HOLES IN OUTPUT COVER. IF TOO MANY

KNOCKOUTS HAVE BEEN REMOVED, INSTALL A NEW COVER.

Figure 4-3. Rear Panel Output Connections

Inductive Loads

Inductive loads provide no loop stability problems in CV mode. However, in CC mode inductive loads will form a parallel resonance network with the power supply's output capacitor. Generally, this will not affect the stability of the unit, but it may cause ringing of the current in the load. Ringing will not occur if the Q (quality factor) of the parallel resonant network is ≤1.0. Use the following formula to determine the Q of your output.

1L Q =

+Re xt CR int

where: C = model-dependent internal capacitance (see below); L = inductance of the load; Rext = equivalent series resistance of the load; Rint = model-dependent internal resistance (see below):

C= 7,000 μF

Rint= 14 mΩ

If the Q is greater than 0.5, inductive loads will ring with the output capacitance and will be damped according to the following equation:

Battery Charging

The power supply's OVP circuit has a downprogrammer FET that discharges the power supply output whenever OVP trips. If a battery (or other external voltage source) is connected across the output and the OVP is inadvertently triggered or the output is programmed below the battery voltage, the power supply will sink current from the battery. To avoid this, insert a reverse blocking diode in series with the ⊕ output of the unit. Connect the diode cathode to the + battery terminal and the diode anode to the ⊕ output terminal of the unit. The diode may require a heat sink.

User Connections 29

Image 29

Agilent Technologies E4356A manual Inductive Loads, Battery Charging

Contents

Operating Programming Guide Certification General Safety Summary Symbol Description Safety Symbol DefinitionsAcoustic Noise Information Herstellerbescheinigung Printing History Declaration General Information Table of Contents Controller Connections Setting Up Remote Sense OperationOperating Configurations Scpi Command Completion Programming Examples Types of Scpi CommandsScpi Confirmed Commands NON-SCPI Commands Description Of Common Commands Calibration Commands Current Subsystem Description Of Subsystem CommandsSystem Commands Command Summary Programming Parameters 105 111 109113 119Page General Information Safety ConsiderationsIntroduction Getting Started Map Options AccessoriesOperator Replaceable Parts List Front Panel Programming DescriptionRemote Programming Analog Programming Downprogramming Output CharacteristicOutput Ranges Inspection InstallationDamage Packaging Material Items Supplied Input Power Source Location and Temperature Connecting Power Cord Downloading and Installing the Driver VXI plug&play Power Products Instrument DriversAccessing Online Help Supported Applications System Requirements Turn-On Checkout Power-On CheckoutPreliminary Checkout Turn-On Checkout Output Checkout Using the KeypadShifted Keys Backspace Key Press Prot Clear Checking the Current Function Determining The Gpib Address Checking The Save And Recall FunctionsCase Of Trouble Line Fuse Power-On Error Messages Error MessagesSelftest Errors Runtime Error Messages Checksum ErrorsError Display Power-On Selftest Errors Failed Test Runtime Errors Meaning Display Analog Connector Load Wire SelectionUser Connections Rear Panel Connections Connecting the Power supply to the Load Digital ConnectorOutput Isolation Capacitive Loads Inductive Loads Battery Charging Setting Up Remote Sense Operation Connecting One Power supply to a Single Load Operating ConfigurationsOVP Considerations Stability Connecting Units in Auto-Parallel Connecting One Power supply To Multiple Loads Auto-Parallel Connection Remote Sensing Optional Connecting Units in Series Series Connection Remote Sensing Optional External Voltage Control Linked Connections Controller ConnectionsStand-Alone Connections 10. Controller Connections Front Panel Operation Front Panel OperationGetting Acquainted Volts Amps Control or IndicatorOCP SRQ  System Keys Front Panel Controls and Indicators Function Keys  Entry Keys Establishing Initial Conditions Programming The OutputProgramming Voltage Programming Overvoltage Protection Programming Current Programming Overcurrent Protection CV Mode vs. CC ModeUnregulated Operation Types of Power supply Gpib Addresses Setting The Gpib AddressSaving and Recalling Operating States Turn-On Conditions Action Display Shows Changing the Power supply Gpib Address Prerequisites for Remote Programming Remote ProgrammingExternal Documents Scpi References Types of Scpi Commands Gpib Capabilities of the Power supplyIntroduction To Scpi Conventions Effect of Optional Headers Traversing the Command TreeActive Header Path Moving Among Subsystems Including Common CommandsScpi Queries Value Coupling Structure of a Scpi Message Types of Scpi MessagesAbor VOLT? Volt Volt MAX Outpprotdel Voltage, Volt, volt Numerical Data Scpi Data FormatsBoolean Data Character Data Programming Examples Scpi Command CompletionWAI OPC? Programming Protection Circuits Programming Voltage and CurrentChanging Outputs by Trigger Saving and Recalling States Programming Status Writing to the DisplayDetecting Events via SRO Reading Specific Registers System Considerations Setting the Gpib AddressProgramming the Digital I/O Port Digdata Assign @PS to Assigning the Gpib Address In Programs DOS Drivers Error HandlingTypes of Drivers Agilent Basic Controllers Iout = OUTPUTS2 Programming Some Power supply Functions CODES$ = Output OFF*SAV CODES$ = STATOPEREVEN? Gosub While C O NON-SCPI Commands Scpi Confirmed Commands1 Language Dictionary Command Syntax Description Of Common CommandsCLS Meaning and Type ESR? ESEESE ESR? PSC *STB? IDN? Parameters None Related CommandsOPC OPC? *WAI OPT? OPC?OPC *TRIG WAI OPT? PSC *RST *SAV RCLESE *SRE SAV RSTPSC SAV SAV Bit Configuration of Status Byte Register Bit Position Condition Bit WeightSRE STB? WAI TRGTST? Calibration Commands Description Of Subsystem CommandsAbor Abor Currprotstat Current SubsystemCurr Currtrig Display Subsystem Digital SubsystemDigdata Disp Disptext Dispmode Measure Subsystem Initiate SubsystemInit Initcont MEASCURR? MEASVOLT? Outpprotcle Outpprotdel Output SubsystemOutp Outprel Status SubsystemOutprelpol Statpres STATOPER? Status Operation RegistersSTATOPERCOND? Statoperenab Status Questionable Registers Statoperntr StatoperptrSTATOUES? STATQUES? Statquesenab STATQUESCOND?Statquesntr Statquesptr Statusquestionableptr SYSTERR? System CommandsSystlang SYSTVERS? Voltage Subsystem Trigger SubsystemTrig Trigsour Voltagelevel 200 MA VoltprotVoltagelevelimmediateamplitude Voltageleveltriggered Command Parameters Subsystem Commands Command SummaryCommand Summary Common Commands Command Parameters Command ParametersPower supply Programming Parameters see note Programming Parameters Register Commands Power supply Status StructureStatus Reporting Operation Status Group Status Byte and Service Request Enable Registers Bit Signal Bit Configurations of Status Registers MeaningOperation Status Group Standard Event Status Group CAL WTG UNR Questionable Status Group Status Questionable Commands Register Query Cleared ByStandard Event Status Group STATQUESNTR? Status Byte Register Inhibit/Fault Indicator PON Power-On Bit Initial Conditions At Power OnDetermining the Cause of a Service Interrupt Status Register Programming Examples Monitoring Both Phases of a Status Transition Servicing an Operation Status Mode EventAdding More Operation Events Servicing Questionable Status Events Value Specifications Typical Common Mode Noise Current Temperature CoefficientsMaximum Input VA and Power AC Input Ranges Output Terminal Isolation Command Processing Time Table A-2. Supplemental Characteristics Parameter ValueOutput Voltage Rise Time/Fall Time Full-load Programming Speed Up Time/Down Time Table A-2. Supplemental Characteristics Test Setup General ProcedureCalibration Equipment Required Changing the Calibration Password Disabling the Calibration ModeFront Panel Calibration Entering the Calibration Values Display Response Table B-2. Typical Front Panel Calibration Procedure Action Error Meaning Table B-3. Gpib Calibration Error Messages MeaningFront Panel Command Corresponding Scpi Calibration Over The Gpib Calcurr Calibration Language DictionaryCalcurrlev Calpass Calvolt CalstatCalvoltlev Calvoltprot Pause Clear Screen Basic Calibration Program Figure B-2. Basic Calibration Program Test Equipment Required VerificationList of Equipment Current Monitoring Resistor Performing The Tests Remove the short from across the load Current Programming and Readback AccuracyVoltage Programming and Readback Current Programming and ReadbackPage Power supply Hardware Error Messages Error MessagesCalibration Error Messages System Error Messages Error Number Line Voltage Conversion Line Voltage ConversionPage Digital Port Functions Fault/Inhibit Operation Figure F-2. Example of Inhibit Input Figure F-4. Digital Port Configuration Jumper Changing The Port Configuration Relay Link Operation Digital I/O OperationIN/OUT 2 pin Common pin Figure F-6. Relay Link Connections Page Compatibility Language Compatibility LanguageParallel Polling Similar Scpi Command Arps Command1Table G-1. Arps Commands Description Outpprotcle Volttrig Currtrig HOLD? TRG RST Hold OFF Hold onVOLTTRIG? CURRTRIG? Init Ontrig Init ON*TRG STO RCL STS? ASTS? TST? IDN? Systlang UNMASK? FAULT?TEST? ID? Systlang Index Index Index Scpi Curr Prot Stat CURR, Curr TRIG, 73 DIG Data Index Agilent Sales and Support Offices Manual Updates