HP 6624A, 6623A, 6621A manual Input Enter Voltage LIMIT,V, Input Enter Operating VOLTAGE,V1

Page 103

CC Operation

Programming for CC operation is straightforward. Program each output to the desired voltage limit point. Then program each output to supply half of the total desired operating current. Both outputs will operate in CC mode. Note that the total desired current cannot exceed the combined current capability of both outputs. Figures 4-11 and 4-12 are examples of parallel configurations. These configurations apply to both CV and CC operating modes. Note the sense lead connections.

10 ASSIGN @Ps TO 705

20 INPUT "ENTER VOLTAGE LIMIT'',V

30 INPUT "ENTER OPERATING CURRENT",Oc

40 C = Oc/2

50 OUTPUT @Ps;"CLR;VSET1,'';V;";ISET1,";C;";VSET2,";V;";ISET2,";C

60 END

LINE 10: Assigns the I/O pathname to the power supply.

LINE 20,30: Enter the voltage limit and operating current.

LINE 40: Divides the total current requirement by 2.

LINE 50: Clears the supply and sets each output to supply half of the desired operating current at any voltage up to the desired voltage limit.

CV Operation

For CV operation, one output must operate in CC mode and the other output must operate in CV mode. The output that is operating in CV mode will be controlling the voltage regulation of both outputs.

In the example that follows, outputs 1 and 2 (both 40 W or 80 W Low V channels) will be operating in parallel with output 1 in CV mode and output 2 in CC mode at output voltages above 2.5 V. Each is programmed to one half of the desired current limit point. Above 2.5 V, the voltage for output 2 is always programmed higher than that of output 1 to ensure that output 2 operates in the CC mode. Note that any current from output 2 that is not required by the load flows into the downprogrammer of output 1 and is reflected in the current readback of output 1. The total current supplied to the load can be read back by adding the results of reading back the currents of outputs 1 and 2. At 2.5 V and below, the outputs are set to the same voltage and the operating modes depend upon the load.

10 ASSIGN @Ps to 705

20 INPUT "ENTER OPERATING VOLTAGE",V1

30 INPUT "ENTER TOTAL CURRENT LIMIT",Ilim

40 C = Ilim/2

50IF V1 > 7 THEN V2 = 20.2

60IF V1< =7 THEN V2=7.07

70IF Vl < = 2.5 THEN V2 = V1

80OUTPUT @Ps;"CLR;ISET1,";C;";VSET1,";V1

90OUTPUT @Ps;''ISET2,";C;"VSET2,";V2

100WAIT 1

110OUTPUT @Ps;"VOUT?1"

120ENTER @Ps;Vout

130OUTPUT @Ps;"IOUT?1''

140ENTER @Ps;Ioutl

150OUTPUT @Ps;"IOUT?2"

160ENTER @Ps;Iout2

170PRINT "OUTPUT VOLTAGE IS ";Vout

180PRINT "TOTAL OUTPUT CURRENT IS ";Ioutl + Iout2

190END

Programming with a Series 200/300 Computer103

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Contents HP Part No Operating ManualCertification Safety Summary Symbol Description Safety SummaryEMC Declaration of ConformityAppendix D--Error Messages Installation ProceduresAppendix A--Calibration Procedure Appendix C--Command SummaryTable Of Contents Local Operation Remote OperationProgramming With The Series 200/300 Computer Command SummaryError Messages CalibrationPage Instrument and Manual Identification Safety ConsiderationsGeneral Information IntroductionDescription AccessoriesOutput Combinations Available Model Output Low Range Values High Range Values Basic OperationHP-IB Board Output Boards Qualifying Conditions SpecificationsDefinitions Output Response Characteristics Source Effect SpecificationsOutputs Low High Voltage Temperature Coefficient Supplemental CharacteristicsCommand Processing Time see Figure Outputs Low High Voltage Programming ResolutionReadback Resolution AC Input Power and CurrentLow Voltage High Voltage 80 W Low Voltage Safety Agency ComplianceDimensions all models Output ImpedanceGeneral Information General Information General Information General Information Initial Inspection InstallationLocation and Cooling Line Fuse Input Power Requirements100/120 2110-0342 220/240 2110-0055 Line FusesLine Voltage Conversion Power CordHP-IB Interface Connector Page Getting Started Front Panel Controls and IndicatorsTurning On Your Supply HP-IB Status Annunciators LCL keySystem Control Keys Power Supply StatusAnnunciators Alphanumeric LCDOutput Control Keys Numeric Entry Keys Line SwitchNormal Self Test Indications Sample Self-Test Failure Display Checking Out Your Supply Using Local ControlOvervoltage Test Voltage TestCurrent Test Enter/Output Statements Introduction To Remote OperationIset Enter OCPAddr Sending a Remote CommandOutput Reading the HP-IB AddressGetting Data From The Supply Often Used CommandsDisp a Disp a Returning the Supply to Local Mode Output Ranges Output Connections and Operating InformationOperating Quadrants Protection FeaturesRange Selection Typical Output Range Characteristics Connecting the Load Page Feet Wire Bundled 10 a 20 aCross Section Meters Area in mm2 Multiple Loads Remote Voltage SensingPositive and Negative Voltages Remote Sense Connections Remote Voltage SensingOpen Sense Leads Output Type FormulaOutput Noise Considerations Programming Response Time with an Output CapacitorExternal Trigger Circuit Overvoltage Trigger ConnectionsEquivalent Internal OV Trigger Circuit Battery Charging Power Supply Protection ConsiderationsParallel Operation CV Operation Maximum Allowable Voltage SettingRemote Sensing CC Operation13. Series Connections with Local Sensing CV Operation Series Operation14. Series Connections with Remote Sensing Specifications for Series OperationPage Page HP-IB Operation Remote OperationInterface Function HP-IB Address Selection Programming Syntax Power-On Service Request PONNumeric Data Sheet 1 of 2. Syntax Forms for Power Supply Commands Sheet 2 of 2. Syntax Forms for Power Supply Commands Ovset Fault ?Vset IsetPage Initial Conditions Power Supply CommandsCurrent Programming Voltage ProgrammingRange Switching Overvoltage OV Protection Output On/OffOVSET? Multiple Output Storage & Recall Overcurrent Protection OCPStatus Reporting Clear CommandASTS? UNR +CCBit Assignment of the Serial Poll Register FAULT?UNMASK? Unmask 2,XXXService Request Generation PON ? SRQ?RQS Bit Reprogramming DelayDisplay On/Off Other Queries Explanation Front PanelResponse Code Code Explanation TEST? ResponsesPage General Local ModeLocal Operation Local Control Of Output FunctionsSetting Current Setting VoltageDisplaying the Contents of the Fault Register Setting Overvoltage ProtectionResetting Overvoltage Protection Resetting Overcurrent ProtectionCondition Setting the Reprogramming DelaySetting the Supplys HP-IB Address Local Control Of System FunctionsRCL Enter Displaying Error MessagesAddr Enter STO EnterPage Test Equipment and Setup Required Calibration ProceduresFigure A-1. Calibration Setup General Calibration Procedure Are not stored. Exercise care when moving the leads Pause Calibration Program10 ! Calibration Example Clear Voltmeter Output BufferDisp END of Calibration Program Input ANY More Outputs to CALIBRATE? Y or N,X$Fnend Page Page Path Names Programming With a Series 200/300 ComputerVoltage and Current Programming Voltage and Current Readback Voltage and Current Programming With VariablesPresent Status Programming Power Supply RegistersPrint OUTPUT1 is in CV Mode END if Service Request and Serial Poll Print Overvoltage on Output #2 Enable Intr OFF Intr Print Overvoltage on Output #1Error Detection Stored Operating States Programming Outputs Connected In ParallelInput Enter Operating VOLTAGE,V1 Input Enter Voltage LIMIT,VInput Enter the Desired Current Limit POINT,I Programming Outputs Connected In SeriesTable C-1. Command Summary Command SummaryCommand Description Table C-l. Command Summary ROM? PON?Previously Test Responses Error Codes and MessagesPower-On Self Test Messages Error Responses Table D-l. Power-On Self Test Error MessageError Code Message Explanation ERR? query ERR key Table D-2. Error ResponsesResponse Code Explanation TEST? query Table D-3. TEST? ResponsesPage Make Changes Manual Backdating6623A Generally Applicable AnnotationsII. CE92 Product Specific Annotations 6621ALatin America Or contactEurope Far East
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