HP 6624A, 6623A, 6621A manual Connecting the Load

Page 46

A fixed overvoltage threshold of approximately 120% of the maximum rated output voltage is built into each output. Because the fixed overvoltage circuit is biased from the output terminals, it can be activated and provide protection even when the supply is not connected to the ac power line.

The OVRST command restores the programmed voltage and current values and clears the OV once the cause of the overvoltage has been eliminated.

OVERCURRENT--when the overcurrent protection feature is enabled, and the output is sourcing current and enters the

+CC operating mode, the output will be disabled (set to zero volts and minimum current) and the word OVERCURRENT will appear on the front panel display. In addition the OC status bit is set for that output. The OCRST command restores the programmed voltage and current values and clears the OC once the cause of the overcurrent condition has been eliminated. Refer to Chapter V for programming details.

UNREGULATED OUTPUT--the supply informs the user when output regulation is not guaranteed. This can occur when attempting to sink excessive currents below 2.5 volts or when operating outputs in parallel. The UNR annunciator on the front panel and the UNR bit in the status register indicate that the specified output is unregulated. Line voltage dropout or an incorrectly set ac power module can also cause the output to become unregulated. If line voltage dropout continues, the supply shuts down and will return to the power-up condition when normal line voltage is restored.

OVERTEMPERATURE--shuts down the linear pass and downprogrammer of the output that has reached an unsafe operating temperature. Operation of the other outputs is unaffected. An overtemperature can occur because of excessively high ambient temperature, a blocked fan, or insufficient space at the sides for adequate air circulation. When an overtemperature condition occurs, the word OVERTEMP appears in the front panel display and the OT status bit is set. This circuit resets automatically and restores the output approximately 30 seconds after the temperature drops sufficiently for safe operation.

ERROR--if the power supply receives an invalid command either through the front panel or the HP-IB, the ERR annunciator on the front panel comes on and the ERR bit in the serial poll register is set. The power supply does not execute the command and remains at previously set values. Pushing the ERR button in local mode displays the error message and clears the error. The error indicator may also indicate that an instrument failure has occurred. Refer to Appendix D for further details.

CONNECTING THE LOAD

Each terminal block cover on the rear panel is secured by a locking tab which snaps into a slot at the left of the terminal block. To remove, insert a screwdriver into this rectangular slot and move the locking tab to the left. When the locking tab releases, gently pull the terminal block cover away from the terminal block. To reinstall the cover, align it over the terminal block and gently press it into position until the locking tab engages.

SHOCK HAZARD Turn off ac power before making rear panel connections. All wires and straps must be properly connected with terminal block screws securely tightened. Replace terminal block covers before reapplying power.

Each rear terminal block has six M3.5 x 0.6 x 6 mm screws for attaching wires (see Figure 2-2). Load connections to the supply are made at the + V and -V terminals on each terminal block Do. not connect unterminated wires to the load terminals. Wires used for load connections must be properly terminated with termination connectors securely attached. Remember to replace the impact resistant plastic covers (HP P/N 06624-20007) over the terminal blocks after making connections.

46 Output Connections and Operating Information

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Contents Operating Manual HP Part NoCertification Safety Summary Safety Summary Symbol DescriptionDeclaration of Conformity EMCAppendix C--Command Summary Installation ProceduresAppendix A--Calibration Procedure Appendix D--Error MessagesTable Of Contents Remote Operation Local OperationCalibration Command SummaryError Messages Programming With The Series 200/300 ComputerPage Introduction Safety ConsiderationsGeneral Information 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 Specifications Source EffectSupplemental Characteristics Outputs Low High Voltage Temperature CoefficientAC Input Power and Current Outputs Low High Voltage Programming ResolutionReadback Resolution Command Processing Time see FigureOutput Impedance Safety Agency ComplianceDimensions all models Low Voltage High Voltage 80 W Low VoltageGeneral Information General Information General Information General Information Initial Inspection InstallationLocation and Cooling Input Power Requirements Line FuseLine Fuses 100/120 2110-0342 220/240 2110-0055Power Cord Line Voltage ConversionHP-IB Interface Connector Page Getting Started Front Panel Controls and IndicatorsTurning On Your Supply LCL key HP-IB Status AnnunciatorsAlphanumeric LCD Power Supply StatusAnnunciators System Control KeysOutput Control Keys Numeric Entry Keys Line SwitchNormal Self Test Indications Checking Out Your Supply Using Local Control Sample Self-Test Failure DisplayOvervoltage Test Voltage TestCurrent Test OCP Introduction To Remote OperationIset Enter Enter/Output StatementsReading the HP-IB Address Sending a Remote CommandOutput AddrGetting Data From The Supply Often Used CommandsDisp a Disp a Returning the Supply to Local Mode Output Connections and Operating Information Output RangesOperating 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 Voltage Sensing Remote Sense ConnectionsProgramming Response Time with an Output Capacitor Output Type FormulaOutput Noise Considerations Open Sense LeadsOvervoltage Trigger Connections External Trigger CircuitEquivalent Internal OV Trigger Circuit Battery Charging Power Supply Protection ConsiderationsParallel Operation 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 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 Iset Fault ?Vset OvsetPage Power Supply Commands Initial ConditionsVoltage Programming Current ProgrammingRange Switching Overvoltage OV Protection Output On/OffOVSET? Overcurrent Protection OCP Multiple Output Storage & RecallClear Command Status ReportingUNR +CC ASTS?Unmask 2,XXX FAULT?UNMASK? Bit Assignment of the Serial Poll RegisterService Request Generation SRQ? PON ?RQS Bit Reprogramming DelayDisplay On/Off Other Queries Explanation Front PanelResponse Code TEST? Responses Code ExplanationPage Local Control Of Output Functions Local ModeLocal Operation GeneralSetting Voltage Setting CurrentResetting Overcurrent Protection Setting Overvoltage ProtectionResetting Overvoltage Protection Displaying the Contents of the Fault RegisterLocal Control Of System Functions Setting the Reprogramming DelaySetting the Supplys HP-IB Address ConditionSTO Enter Displaying Error MessagesAddr 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 Clear Voltmeter Output Buffer Calibration Program10 ! Calibration Example 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 Programming With Variables Voltage and Current ReadbackService Request and Serial Poll Programming Power Supply RegistersPrint OUTPUT1 is in CV Mode END if Present StatusPrint Overvoltage on Output #1 Enable IntrOFF Intr 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,ITable C-1. Command Summary Command SummaryCommand Description Table C-l. Command Summary PON? ROM?Previously Table D-l. Power-On Self Test Error Message Error Codes and MessagesPower-On Self Test Messages Error Responses 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 Changes6621A Generally Applicable AnnotationsII. CE92 Product Specific Annotations 6623AFar East Or contactEurope 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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