HP 6624A, 6623A, 6621A Basic Operation, Output Low Range Values High Range Values, HP-IB Board

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Storage and recall of programmed voltage and current values for all outputs.

Queries of programmed functions or settings.

Output enable or disable.

Programming syntax error detection.

Programmable delay time for service request and OCP mask.

Voltage, current, and overvoltage calibration.

HP-IB interface selftest.

Message display capability on the front panel.

Output connections are made to rear panel screw terminals. Either the positive or negative output terminal can be grounded, or the output can be floated up to ±240 Vdc (including output voltage) from chassis ground. Output voltage can be locally or remotely sensed, and identical outputs can be operated in series or parallel combinations for increased output voltage or current capability. As shipped from the factory, the power supply is jumpered for local sensing.

Your power supply can be calibrated without having to remove the cover or even having to remove it from your system cabinet. This feature allows you to calibrate the supply at its normal operating temperature. The recommended calibration interval is one year. Refer to Appendix A of this manual for complete calibration details. A calibration security jumper is available inside the unit. Access is described in the service manual.

Basic Operation

Figure 1-2 is a block diagram that illustrates the major assemblies contained within the power supply. As shown in the figure, each supply includes a power transformer, two or more output boards, an HP-IB board, and front panel (display and control keys).

Output

Low Range Values

High Range Values

80 W Low, Voltage

7 V @ 10 A

20 V @ 4 A

80 W High Voltage

20 V @ 4 A

50 V @ 2 A

40 W Low Voltage

7 V @ 5 A

20 V @ 2 A

40 W High Voltage

20 V @ 2 A

50 V @ 0.8 A

Figure 1-1. Output Operating Ranges for HP Models 6621A, 6624A and 6627A.

The appropriate ac input voltage is applied to each output board where it is converted to a raw dc voltage which is subsequently linearly regulated to become the dc output voltage. The magnitude of the output and the mode of operation are determined by the load and the data received from the HP-IB computer or from the front panel.

Each power supply model contains one output board for each output that it provides. Models 6624A and 6627A contain four 40 watt output boards; Model 6623A contains two 40 watt output boards and one 80 watt output board; Models 6621A and 6622A each contain two 80 watt output boards.

HP-IB Board

The HP-IB board provides the interface between the user and the multiple outputs of the power supply. Each output board is actually an output channel that can be individually selected and controlled over the HP-IB or from the supply's front panel. Circuits on the HP-IB board interpret commands from the HP-IB or from the front panel to control the selected output.

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Contents HP Part No Operating ManualCertification Safety Summary Symbol Description Safety SummaryEMC Declaration of ConformityAppendix A--Calibration Procedure Installation ProceduresAppendix C--Command Summary Appendix D--Error MessagesTable Of Contents Local Operation Remote OperationError Messages Command SummaryCalibration Programming With The Series 200/300 ComputerPage General Information Safety ConsiderationsIntroduction Instrument and Manual IdentificationDescription 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 CharacteristicsReadback Resolution Outputs Low High Voltage Programming ResolutionAC Input Power and Current Command Processing Time see FigureDimensions all models Safety Agency ComplianceOutput Impedance Low Voltage High Voltage 80 W Low VoltageGeneral 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 keyAnnunciators Power Supply StatusAlphanumeric LCD System Control KeysOutput 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 Iset Enter Introduction To Remote OperationOCP Enter/Output StatementsOutput Sending a Remote CommandReading the HP-IB Address AddrGetting 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 SensingOutput Noise Considerations Output Type FormulaProgramming Response Time with an Output Capacitor Open Sense LeadsExternal 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 Vset Fault ?Iset OvsetPage 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 +CCUNMASK? FAULT?Unmask 2,XXX Bit Assignment of the Serial Poll RegisterService Request Generation PON ? SRQ?RQS Bit Reprogramming DelayDisplay On/Off Other Queries Explanation Front PanelResponse Code Code Explanation TEST? ResponsesPage Local Operation Local ModeLocal Control Of Output Functions GeneralSetting Current Setting VoltageResetting Overvoltage Protection Setting Overvoltage ProtectionResetting Overcurrent Protection Displaying the Contents of the Fault RegisterSetting the Supplys HP-IB Address Setting the Reprogramming DelayLocal Control Of System Functions ConditionAddr Enter Displaying Error MessagesSTO Enter RCL EnterPage Test Equipment and Setup Required Calibration ProceduresFigure A-1. Calibration Setup General Calibration Procedure Are not stored. Exercise care when moving the leads 10 ! Calibration Example Calibration ProgramClear Voltmeter Output Buffer PauseDisp 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 VariablesPrint OUTPUT1 is in CV Mode END if Programming Power Supply RegistersService Request and Serial Poll Present StatusOFF Intr Enable IntrPrint Overvoltage on Output #1 Print Overvoltage on Output #2Error 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 Power-On Self Test Messages Error Responses Error Codes and MessagesTable D-l. Power-On Self Test Error Message Test ResponsesError Code Message Explanation ERR? query ERR key Table D-2. Error ResponsesResponse Code Explanation TEST? query Table D-3. TEST? ResponsesPage Make Changes Manual BackdatingII. CE92 Product Specific Annotations Generally Applicable Annotations6621A 6623AEurope Or contactFar 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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