HP 6621A, 6623A, 6624A manual Are not stored. Exercise care when moving the leads

Page 92

NOTE

Do not turn the power supply off during the calibration procedures. Otherwise, the correction constants

 

are not stored. Exercise care when moving the leads.

1.CMODE < param > - This command turns the calibration mode either on or off. The parameter must be either a 1 or a 0. CMODE1 is used in the beginning of the calibration procedure to turn calibration mode on. CMODE must be on to use any of the calibration statements. CMODE0 is used at the end of the procedure to store the correction constants and turn calibration mode off. The CMODE? query can also be used at any time to determine if the supply is in calibration mode. A 1 indicates calibration mode is on; a 0 indicates calibration mode is off. Continue to the next command.

2.VHl<channel> - This command causes the voltage of the specified output channel to go to the high calibration point (full scale). After the command is sent, use the voltmeter to read the actual voltage <Vhi > put out by the power supply. Continue to the next command.

3.VLO < channel > - This command causes the voltage of the specified output channel to go to the low calibration point (voltage offset). After the command is sent, use the voltmeter to read the actual voltage < Vlo > put out by the power supply. Continue to the next command.

4.VDATA < channel >, < Vlo >, < Vhi > - This command is used to send the actual values measured by the voltmeter in the previous steps to the power supply. Refer to Table A-2 for the range of valid voltage readings that can be sent to the supply. <Vlo> is the voltage in volts that was measured after the VLO command was sent. < Vhi > is the voltage in volts that was measured after the VHI command was sent. The power supply uses these values to calculate the voltage and voltage readback correction constants of the specified output. Continue to the next command.

5.OVCAL < channel > - This command automatically calibrates the programmable overvoltage. This can only be done after the voltage has been calibrated. It may take up to 10 seconds for this command to execute. During this time, the front panel display indicates "CALIBRATING" .

When the front panel display of the power supply no longer indicates ''CALIBRATING", the overvoltage portion of the calibration procedure is complete. The voltages on the output are returned to zero volts after the overvoltage calibration. To continue with the current portion of the calibration procedure, connect a four terminal 0.1Ω current shunt resistor (0.05%, 10 A) between the +V and -V output terminals. Connect the voltmeter to the resistor's sense terminals. Refer to the current calibration setup in Figure A-1.

Continue calibrating output 1 with the following commands:

6.IHI < channel > - This command causes the current of the specified output channel to go to the high calibration point (full scale). After the command is sent, use the voltmeter to read the voltage drop across the current shunt resistor. Divide this reading by the shunt value to derive the actual current in amps < Ihi > put out by the supply. Continue to the next command.

7.ILO <channel> - This command causes the current of the specified output channel to go to the low calibration point (current offset). After the command is sent, use the voltmeter to read the voltage drop across the current shunt resistor. Divide this reading by the shunt value to derive the actual current in amps <Ilo> put out by the supply. Continue to the next command.

8.IDATA < channel >, < IIO >, < Ihi > - This command is used to send the actual current values derived in steps 6 and 7 to the power supply. Refer to Table A-2 for the range of valid current readings that can be sent to the supply. < Ilo > is the current in amps that was put out by the supply after the ILO command was sent. < Ihi > is the current in amps that was put out by the supply after the IHI command was sent. The power supply uses these values to calculate the current and current readback correction constants of the specified output.

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Contents Operating Manual HP Part NoCertification Safety Summary Safety Summary Symbol DescriptionDeclaration of Conformity EMCInstallation Procedures Appendix A--Calibration ProcedureAppendix C--Command Summary Appendix D--Error MessagesTable Of Contents Remote Operation Local OperationCommand Summary Error MessagesCalibration Programming With The Series 200/300 ComputerPage Safety Considerations General InformationIntroduction Instrument and Manual IdentificationOutput Combinations Available Model AccessoriesDescription HP-IB Board Basic OperationOutput Low Range Values High Range Values Output Boards Definitions SpecificationsQualifying Conditions Output Response Characteristics Specifications Source EffectSupplemental Characteristics Outputs Low High Voltage Temperature CoefficientOutputs Low High Voltage Programming Resolution Readback ResolutionAC Input Power and Current Command Processing Time see FigureSafety Agency Compliance Dimensions all modelsOutput Impedance Low Voltage High Voltage 80 W Low VoltageGeneral Information General Information General Information General Information Location and Cooling InstallationInitial Inspection Input Power Requirements Line FuseLine Fuses 100/120 2110-0342 220/240 2110-0055Power Cord Line Voltage ConversionHP-IB Interface Connector Page Turning On Your Supply Front Panel Controls and IndicatorsGetting Started LCL key HP-IB Status AnnunciatorsPower Supply Status AnnunciatorsAlphanumeric LCD System Control KeysOutput Control Keys Normal Self Test Indications Line SwitchNumeric Entry Keys Checking Out Your Supply Using Local Control Sample Self-Test Failure DisplayCurrent Test Voltage TestOvervoltage Test Introduction To Remote Operation Iset EnterOCP Enter/Output StatementsSending a Remote Command OutputReading the HP-IB Address AddrDisp a Often Used CommandsGetting Data From The Supply Disp a Returning the Supply to Local Mode Output Connections and Operating Information Output RangesRange Selection Protection FeaturesOperating Quadrants Typical Output Range Characteristics Connecting the Load Page Cross Section Meters Area in mm2 Wire Bundled 10 a 20 aFeet Positive and Negative Voltages Remote Voltage SensingMultiple Loads Remote Voltage Sensing Remote Sense ConnectionsOutput Type Formula Output Noise ConsiderationsProgramming Response Time with an Output Capacitor Open Sense LeadsOvervoltage Trigger Connections External Trigger CircuitEquivalent Internal OV Trigger Circuit Parallel Operation Power Supply Protection ConsiderationsBattery Charging Maximum Allowable Voltage Setting CV OperationCC Operation Remote SensingSeries Operation 13. Series Connections with Local Sensing CV OperationSpecifications for Series Operation 14. Series Connections with Remote SensingPage Page Interface Function Remote OperationHP-IB Operation HP-IB Address Selection Numeric Data Power-On Service Request PONProgramming Syntax Sheet 1 of 2. Syntax Forms for Power Supply Commands Sheet 2 of 2. Syntax Forms for Power Supply Commands Fault ? VsetIset OvsetPage Power Supply Commands Initial ConditionsVoltage Programming Current ProgrammingRange Switching OVSET? Output On/OffOvervoltage OV Protection Overcurrent Protection OCP Multiple Output Storage & RecallClear Command Status ReportingUNR +CC ASTS?FAULT? UNMASK?Unmask 2,XXX Bit Assignment of the Serial Poll RegisterService Request Generation SRQ? PON ?Display On/Off Reprogramming DelayRQS Bit Other Queries Response Code Front PanelExplanation TEST? Responses Code ExplanationPage Local Mode Local OperationLocal Control Of Output Functions GeneralSetting Voltage Setting CurrentSetting Overvoltage Protection Resetting Overvoltage ProtectionResetting Overcurrent Protection Displaying the Contents of the Fault RegisterSetting the Reprogramming Delay Setting the Supplys HP-IB AddressLocal Control Of System Functions ConditionDisplaying Error Messages Addr EnterSTO Enter RCL EnterPage Calibration Procedures Test Equipment and Setup RequiredFigure A-1. Calibration Setup General Calibration Procedure Are not stored. Exercise care when moving the leads Calibration Program 10 ! Calibration ExampleClear Voltmeter Output Buffer PauseFnend Input ANY More Outputs to CALIBRATE? Y or N,X$Disp END of Calibration Program Page Page Voltage and Current Programming Programming With a Series 200/300 ComputerPath Names Voltage and Current Programming With Variables Voltage and Current ReadbackProgramming Power Supply Registers Print OUTPUT1 is in CV Mode END ifService Request and Serial Poll Present StatusEnable Intr OFF IntrPrint Overvoltage on Output #1 Print Overvoltage on Output #2Error Detection Programming Outputs Connected In Parallel Stored Operating StatesInput Enter Voltage LIMIT,V Input Enter Operating VOLTAGE,V1Programming Outputs Connected In Series Input Enter the Desired Current Limit POINT,ICommand Description Command SummaryTable C-1. Command Summary Table C-l. Command Summary PON? ROM?Previously Error Codes and Messages Power-On Self Test Messages Error ResponsesTable D-l. Power-On Self Test Error Message Test ResponsesTable D-2. Error Responses Error Code Message Explanation ERR? query ERR keyTable D-3. TEST? Responses Response Code Explanation TEST? queryPage Manual Backdating Make ChangesGenerally Applicable Annotations II. CE92 Product Specific Annotations6621A 6623AOr contact EuropeFar East Latin America

6624A, 6621A, 6623A specifications

The HP 6623A, 6621A, and 6624A are precision DC power supplies widely recognized for their reliability and performance in various laboratory and industrial applications. These models are part of HP's 662X series, designed to cater to the needs of engineers, researchers, and technicians who require accurate power sources for their testing and development activities.

The main features of the HP 6623A, 6621A, and 6624A include their high stability, low ripple, and excellent load regulation, ensuring that the output voltage and current remain stable during testing. The power supplies provide multiple output channels, allowing users to power multiple devices simultaneously. The flexibility in setting voltage and current levels makes these models ideal for a wide range of applications, including semiconductor testing, device characterization, and system integration.

One of the standout technologies in the HP 662X series is the use of smart design techniques that minimize noise and enhance output performance. These power supplies incorporate advanced feedback mechanisms to maintain steady output, even under varying load conditions. Additionally, they feature programmable outputs, which means users can adjust the output levels through a connected computer or control system, streamlining the testing process and improving efficiency.

The HP 6623A model offers three independent outputs, with total power capabilities of 40 watts. It includes a 0-20V output, which can deliver up to 2A of current, along with two additional outputs that are adjustable. The 6621A provides a single output option, delivering a maximum of 20V and 2A, making it well-suited for simple applications where a single power source is required. In contrast, the HP 6624A stands out with its four independent output channels, providing a total of 60 watts, making it the most versatile of the three models.

Characteristics of these power supplies include user-friendly interfaces, allowing for easy configuration and monitoring of settings. LED indicators provide real-time feedback on voltage and current levels, enabling users to quickly assess the performance of their tests. Moreover, built-in protection features safeguard both the power supply and the connected devices from overvoltage and overcurrent conditions.

Overall, the HP 6623A, 6621A, and 6624A power supplies embody advanced engineering and design, making them invaluable tools for professionals looking for high-quality, reliable power sources for their electronic testing needs.
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