Agilent Technologies 6624A, 6621A Local Operation, Local Mode, Local Control Of Output Functions

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6

Local Operation

Introduction

Chapter 3 introduced you to the supply’s front panel controls and indicators to help you turn on the supply and perform the checkout procedures that were given in that chapter. The following paragraphs describe how to use all of the front panel controls and indicators. Most of the remote operations described in Chapter 5 can also be performed locally from the supply’s front panel.

Local Mode

In order to use the front panel keys to control the supply, the local mode must be in effect. The local mode is in effect immediately after power is applied. Table 5-3 lists the initial settings for all of the power supply’s functions when power is initially applied. When the local mode is in effect (RMT annunciator off), the Output Function, System Function, and Numeric Entry keys on the front panel (see Figure 6-1) can be used to operate the power supply.

In the remote mode (front panel RMT annunciator on), the front panel keys will have no effect on any of the supply’s outputs and only the computer can control the supply. You can, however, still use the front panel display to view the output voltage and current readings or the present settings for the selected output channel while the supply is in the remote mode.

You can return the supply to the local mode from the remote mode by pressing the LCL key provided that the local lockout command has not been received from the GP-IB controller. Pressing the LCL key will also turn the supply’s display back on if it was turned off with a DSP command during remote operation (see page 78). A change between the local and remote modes will not result in a change in the power supply’s outputs.

Local Control Of Output Functions

The Output Function keys (see Figure 6-1) allow you to control the selected output. Figure 6-1 shows the annunciator arrow over OUTPUT 2 indicating that output channel 2 is selected. Pressing the OUTPUT SELECT key selects the output channels in forward (∉) or reverse ( ∠ ) sequence. Note that Figure 6-1 illustrates the front panel for the Agilent 6624A supply which has four output annunciators. The Agilent 6627A front panel also has four annunciators. The front panels for Agilent Models 6621A, 6622A, and 6623A are identical to Figure 6-1 except they have fewer output annunciators.

General

The power supply will accept programming values directly in volts and amps. The programmable voltage, current, and overvoltage ranges for the outputs of each model are given in Table 5-4. The power supply will round off the values received to the nearest multiple of the resolution for that particular output. If you send a value out of the valid range, it will not be executed and the ERR annunciator will come on. You can get a readout of the error on the display by pressing the ERR key. For an out-of-range error, the error message "NUMBER RANGE" will be displayed.

When you press the VSET, ISET, OVSET, DLY, or UNMASK key, the output selected and the present setting for that function will be displayed. For example, the front panel display in Figure 6-1 shows the VSET function for output 2 set to 1.250. You can change the setting using the numeric entry keys. Pressing the number keys will cause the present numeric setting to become blank and be replaced with the new numbers on the display. You can use the ← key to erase previous keystrokes if you make a mistake.

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Contents Agilent Part No Operating ManualCertification Safety Summary Environmental Conditions Safety SummaryEMC Declaration of ConformityWhat this Manual Contains Table Of Contents Local Operation Remote OperationProgramming With a Series 200/300 Computer Command SummaryError Messages CalibrationInstrument and Manual Identification Safety ConsiderationsGeneral Information IntroductionOutput Combinations Available AccessoriesDescription ModelGP-IB Board Basic OperationOutput Boards Qualifying Conditions SpecificationsDefinitions Output Response Characteristics Source Effect SpecificationsOutputs Low High Voltage Temperature Coefficient Supplemental CharacteristicsOVP Readback ResolutionLow Voltage General Information General Information General Information General Information Initial Inspection InstallationLocation and Cooling Line Fuse Input Power RequirementsLine Fuses GP-IBLine Voltage Conversion Power CordGP-IB Interface Connector Getting Started Front Panel Controls and IndicatorsTurning On Your Supply 15V 35A Output Controls and Indicators Number Controls/lndicators Normal Self Test Indications Test Pattern of all Display Segments at Power-onSample Self-Test Failure Display Checking Out Your Supply Using Local ControlOvervoltage Test Voltage TestCurrent Test RST Introduction To Remote OperationIset Enter OCPAddr Sending a Remote CommandOutput Reading the GP-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 AWG Wire Size Wire Bundled 10 a 20 aMultiple Loads Remote Voltage SensingRemote 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 GP-IB Operation Remote OperationInterface Function GP-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 Data Range Power Supply Commands Header Output ChannelInitial Conditions Power Supply CommandsCurrent Programming Voltage ProgrammingVSET? VOUT?IOUT? Avg Current-Avg RangeAvg ResolutionOutput On/Off Range SwitchingOVSET? Overvoltage OV ProtectionOvercurrent Protection OCP Multiple Output Storage & Recall Clear CommandStatus Reporting UNR +CC Functional Relationship of Status RegistersUNMASK? ASTS?Unmask 2,XXX PON RQS ERR RDY FAU FAULT?Service Request Generation Bit Assignment of the Serial Poll RegisterSRQ? RQS Bit Reprogramming DelayOther Queries Display On/OffCMODE? TEST?Front Panel Response GP-IB Code Error Messages ExplanationCode Explanation Front PanelResponse Code TEST? ResponsesGeneral 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 Supply’s GP-IB Address Local Control Of System FunctionsRCL Enter Displaying Error MessagesAddr Enter STO EnterTest Equipment and Setup Required Calibration ProceduresFigure A-1. Calibration Setup Table A-1. Calibrat ion Commands Header Channel Data Syntax General Calibration ProcedureSee Figure Page 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 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 PollPrint Overvoltage on Output #2 Enable IntrOFF 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?SRQ? 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? ResponsesMake Changes Manual Backdating6623A Generally Applicable AnnotationsII. CE’92 Product Specific Annotations 6621AUnited States Latin America Agilent Sales and Support OfficeManual Updates

6627A, 6621A, 6624A, 6623A, 6622A specifications

Agilent Technologies is renowned for its high-quality electronic test and measurement equipment, and the Agilent 6600 series is no exception. This series includes models like the Agilent 6621A, 6622A, 6623A, 6624A, and 6627A, each designed to meet the needs of various application requirements, making them an essential part of modern laboratories.

The Agilent 6621A is a single-output DC power supply that provides a stable output voltage and current, making it ideal for testing and powering electronic devices. It features a low noise specification, which is crucial for sensitive applications. With a maximum output voltage of 30V and a current of 3A, it offers flexibility for a range of projects, from powering prototypes to performing benchmark tests.

The Agilent 6622A, a dual-output model, enhances versatility by allowing users to power two devices concurrently. It delivers output voltages of up to 20V and a total output current of 5A, which is perfect for powering circuit boards with multiple components. The built-in voltage and current limiting functions protect the equipment under test, preventing any potential damage.

On the other hand, the Agilent 6623A provides additional capabilities with its three outputs, making it particularly suitable for complex testing procedures. With a maximum voltage of 20V and output current reaching 6A across all channels, it ensures that multiple loads can be powered simultaneously without compromising performance.

The Agilent 6624A further pushes these capabilities with its higher output power. This model boasts two outputs with a combined maximum output of up to 6A, supporting devices that require more demanding power levels. Its advanced control features allow for precise voltage and current adjustments, enhancing reliability during experiments.

Lastly, the Agilent 6627A stands out as a highly scalable power supply, capable of delivering up to 40V and 7.5A across its multiple outputs. This model is particularly beneficial for applications requiring higher voltages, enabling engineers and technicians to work with a broader array of components and systems.

All models in the Agilent 6600 series incorporate built-in protection features to guarantee safety during testing. They are equipped with memory functions, allowing users to save and recall settings quickly. Additionally, the intuitive interface and various connectivity options make these power supplies user-friendly, ensuring efficient workflow in any laboratory setting. In summary, the Agilent 6600 series offers a compelling combination of versatility, precision, and advanced features, catering to diverse electronic testing applications.
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