Agilent Technologies n3300a Features and Capabilities, Front Panel Controls, Remote Programming

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General Information - 2

The N3301A is a DC Electronic Load Mainframe that is functionally identical to the N3300A, but is a half-rack width with only two slots for load modules. The mainframe can dissipate up to 300 watts per slot, to a total of 600 watts for a fully loaded mainframe.

The N3302A, N3303A N3304A, N3305A and N3306A are electronic load modules that can be installed in the N3300A and N3301A mainframes. The module specific pages in Appendix A include specifications and other information pertinent to a particular model. Each module can operate independently in constant current (CC) mode, constant voltage (CV) mode, or constant resistance (CR) mode. In addition, each input can be turned on or off (open-circuited), or short-circuited.

Features and Capabilities

♦Constant current (CC), constant voltage (CV), or constant resistance (CR) mode operation.

♦Built-in GPIB and RS-232 interface programming with SCPI command language.

♦Triggered input and measurement functions.

♦Front panel control with keypad.

♦Independent channel operation.

♦Built-in pulse generator for continuous, pulsed, and toggled transient operation.

♦Overvoltage, overcurrent, overpower, and overtemperature protection.

♦Extensive selftest, status reporting and software calibration.

♦Fan speed control for reduced acoustic noise under light load conditions.

Front Panel Controls

The front panel has keyboard controls for setting the input voltage, current and resistance. The panel display provides digital readouts of a number of functions including the inputs. Annunciators display the operating status of the electronic load. System keys let you perform system functions such as setting the GPIB address and recalling operating states. Front panel function keys access the electronic load function menus. Front panel Entry keys let you select and enter parameter values. Refer to chapter 5 for a complete description of the front panel controls.

Remote Programming

The electronic load may be remotely programmed via the GPIB bus and/or an RS-232 serial port. GPIB programming is done with SCPI (Standard Commands for Programmable Instruments) commands, which make the electronic load programs compatible with those of other GPIB instruments that are also SCPI compatible.

Local (front panel) control is in effect immediately after power is applied. The front panel keypad and display allow manual control of each individual module when the electronic load is used in bench test applications. Remote (computer) control goes into effect (front panel Rmt annunciator is on) as soon as the mainframe receives a command via the GPIB. A built-in GPIB interface and SCPI commands allow control and readback of all functions when the electronic load is used in computer controlled applications.

With remote control in effect, only the computer can control the electronic load; the front panel keypad has no effect. You can still use the front panel display to view the input voltage and current readings. To return the electronic load to local control, press the Local key. This will return the electronic load to local control, unless the local-lockout command has been received from the GPIB controller.

Most functions that can be performed remotely over the GPIB or RS-232 can also be performed from the front panel. Whenever possible the function menu commands reflect their corresponding SCPI commands. Thus, learning to operate the electronic load from the front panel will aid you when writing computer programs.

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Contents USER’S Guide Warranty Information CertificationSafety Summary GeneralSafety Symbols Declaration Declaration of ConformityAcoustic Noise Information Printing HistoryTable of Contents TURN-ON Checkout 101 Quick Reference Front Panel -At a GlanceQuick Reference Instrument ConfigurationRear Panel At a Glance Front Panel Number Entry Use the Function keys and Entry keys to enter a new valueFront Panel Annunciators Immediate Action KeysFront Panel Menus At a Glance Quick Reference Front Panel Menus VoltageScpi Programming Commands At a Glance Complete description of all programming commandsQuick Reference Scpi Commands Getting Started Map Task Where to find informationDocument Orientation Description Safety ConsiderationsOptions and Accessories Remote Programming Features and CapabilitiesFront Panel Controls Immediate Current Level Constant Current CC ModeOperating Modes Constant Resistance CR Mode General Information Triggered Current LevelTransient Current Level Software Current LimitTransient Resistance Level Constant Voltage CV ModeTriggered Resistance Level Triggered Voltage Level Transient Voltage LevelTransient Operation Continuous Transient OperationPulsed Transient Operation Toggled Transient OperationTriggering a preset level List OperationTriggered Operation Triggering a transient pulseSlew Rate and Minimum Transition Time Risetime Transition LimitationTransition Time Slew Rate Examples Protection Features Resetting Latched ProtectionInput Control Short On/OffOverpower OvertemperatureGeneral Information Overvoltage OvercurrentStatus Reporting Reading Remote Programming ErrorsReverse Voltage Saving and Recalling Settings External Control SignalsRemote Sensing Monitor OutputsPort On/Off FaultInput Measurements Power Measurements DC MeasurementsRMS Measurements Minimum and Maximum MeasurementsCleaning InspectionDamage Packaging Material Items SuppliedInstallation Installing the ModulesProcedure Location Channel Number3A. N3300A Outline Diagram Do not block the fan exhaust at the rear of the unit Bench OperationRack Mounting Input Connections Power CordManually-Tightened Connectors 8mm Screw Terminal Connector option UJ1 6a. Manual ConnectorWire Considerations Maximum Wire Lengths to Limit Voltage Drops Stranded Copper Wire Ampere CapacityWire Size Ampacity Control Connector A1-A3A11 and A10 +S and -SSense Switch Trigger and Digital ConnectionsRS-232 Interface Computer ConnectionsGpib Interface Application Connections Local Sense ConnectionsRemote Sense Connections Parallel Connections11. Remote Sensing Low Voltage Operation 13. Zero Volt LoadingCheckout Programming Values Checkout ProcedureIntroduction Error Messages Selftest ErrorsSelftest Error Codes Case of TroubleFront Panel Description Front Panel, Overall ViewFront Panel Operation Display Command Function System KeysFunction keys Immediate Action KeysDisplay Measurement Scrolling KeysMetering Keys Input Control Keys InpshorList Control Keys Transient Control KeysTrigger Control Keys Entry Keys Entry KeysUsing the Front Panel Display Set the constant current mode inputExamples of Front Panel Programming Programming Constant Current, Voltage and Resistance ModesSet the constant resistance mode input Set the constant voltage mode inputSet transient operation for Continuous mode Programming Transient OperationSet transient operation for Pulse mode Set transient operation for Toggled modeProgramming Lists Tmode ToggList Sequence Querying and Clearing Output Protection and Errors Query and Clear Errors as followsMaking Basic Front Panel Measurements Use the Meter menu for making front panel measurementsSetting the Gpib Address Storing and Recalling Instrument StatesSet the Gpib address as follows Save an instrument state in location 0 as followsSpecifications Specifications Specifications a Table A-2. Supplemental CharacteristicsSpecifications N3302A N3303A N3304A N3305A N3306APerformance Test and Calibration Procedures Equipment RequiredCC Mode Tests Performance TestsImon Zero Verification Performance Test and CalibrationCV Mode Tests CC Mode Regulation TestPerformance Test and Calibration B Voltage Programming and Measurement Accuracy TestCV Mode Regulation Test Resistance Range 2 Programming Accuracy CR Mode TestsResistance Range 1 Programming Accuracy Resistance Range 3 Programming Accuracy Resistance Range 4 Programming AccuracyTransient Generator Mode Tests Frequency and Duty Cycle AccuracyPerformance Test and Calibration Pulse Width Accuracy Output 705TRAN on Output 705TRIGIMMAgilent N3302A Verification Test Record Agilent N3303A Verification Test Record Agilent N3304A Verification Test Record Agilent N3305A Verification Test Record Agilent N3306A Verification Test Record Calibration Figure B-3. Voltage Calibration Parameters Calibrated Table B-2 Variables and Power Source SettingsCalibration IMON, Iprog and Current Calibration Program Performance Test and Calibration Wait Performance Test and Calibration Voltage Calibration Program Print TABXY9,15CALIBRATING High Voltage RangePerformance Test and Calibration Resistance Calibration Program Calibrating Range Performance Test and Calibration B 100 Index 101Index 102103 United States Latin America Canada Australia/New ZealandEurope Asia Pacific JapanManual Updates
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