USER’S GUIDEAgilent TechnologiesDC Electronic LoadsModels N3300A, N3301A, N3302A,N3303A, N3304A, N3305A and N3306A
111Quick ReferenceThe Front Panel -At a Glance j15-character display showschannel, voltage and currentmeasurements. k Annunciators indicateoperating
Index103Address, 57Error, 57Interface, 57Local, 57RCL, 57Save, 57Shift, 57Ttransient, 26continuous, 26pulse, 26toggled, 26transientscontinuous mode, 6
104Agilent Sales and Support OfficeFor more information about Agilent Technologies test and measurement products, applications, services, and fora cur
Manual UpdatesThe following updates have been made to this manual since its publication.6/1/01Table 2-1 has been updated with new option part numbers.
1 - Quick Reference12The Rear Panel At a GlanceQ Control connector R Input binding post S GPIB connector T RS-232 interfaceconnector1 2 34567U Po
Quick Reference - 113 Front Panel Number Entry Enter numbers from the front panel as follows: Use the Entry Scroll keys to adjust the input setting in
1 - Quick Reference14 Front Panel Annunciators φφφφ1 A list is initiated or running. Prot Indicates that a channel protection feature is activeon any
Quick Reference - 115Front Panel Menus - At a GlanceADDRESS 5Sets the GPIB AddressINTF GPIBSelects an interface (GPIB or RS232)BAUDRATE 300Selects bau
1 - Quick Reference16Front Panel Menus - continuedVOLTSets the input voltageV:MODESets the voltage mode (FIXED, LIST)V:RANGSets the input voltage rang
Quick Reference - 117SCPI Programming Commands - At a Glance NOTE Most [optional] commands have been omitted for clarity. Refer to the Programming Gu
1 - Quick Reference18SCPI Commands - continued [SOURce:]LIST (continued) :VOLTage [:LEVel] <n> {,<n>} :POINts? :RANGe <n> {,<
192General InformationDocument OrientationThis manual describes the operation of the Agilent Model N3300A, N3301A, N3302A, N3303A N3304A,N3305A and N3
2 - General Information20Safety ConsiderationsThis electronic load is a Safety Class 1 instrument, which means it has a protective earth terminal. Th
2Warranty InformationCERTIFICATIONAgilent Technologies certifies that this product met its published specifications at time of shipment from the facto
General Information - 221The N3301A is a DC Electronic Load Mainframe that is functionally identical to the N3300A, but is a half-rackwidth with only
2 - General Information22Operating ModesThe three modes of operation are:♦ Constant current (CC).♦ Constant voltage (CV).♦ Constant resistance (CR)
General Information - 223Triggered Current LevelA current level can be preset (stored in the electronic load) allowing the input to be updated when a
2 - General Information24Figure 2-2. Constant Resistance ModeImmediate Resistance LevelThe resistance level can be set at the front panel or via the
General Information - 225(VOLT:RANG command). When you program a voltage value, the electronic load automatically selects therange that corresponds t
2 - General Information26Transient OperationTransient operation enables the module to periodically switch between two load levels, as might be require
General Information - 227List OperationList mode lets you generate complex sequences of input changes with rapid, precise timing, which may besynchron
2 - General Information28If the ac line is selected via the GPIB as the trigger source, triggers will be generated once for each cycle of acinput powe
General Information - 229Therefore, both minimum transition time and slew rate must be considered when determining the actualtransition time. This is
2 - General Information30Input ControlShort On/OffA module can simulate a short circuit at its input by turning the load on with full-scale current.
3Safety SummaryThe following general safety precautions must be observed during all phases of operation of this instrument. Failure tocomply with thes
General Information - 231Caution To protect the electronic load from possible damage, the input voltage must not exceed themaximum input voltage rati
2 - General Information32remain set until they are reset. If the OT condition still exists when the reset is executed, the module's input willre
General Information - 233Saving and Recalling SettingsThe electronic load has internal registers in which settings (mode, current, voltage, resistance
2 - General Information3420A Input (programmed via GPIB or front panel)± 1V (2 V peak-peak) 1 kHz external programming signalThe external programming
General Information - 235As shipped from the factory, front panel measurements for input voltage and current are calculated from a totalof 1000 readin
373InstallationInspectionDamageWhen you receive your electronic load, inspect it for any obvious damage that may have occurred duringshipment. If the
3 - Installation38Installing the ModulesProcedure1. With the mainframe off, disconnect the power cord and remove the top cover by loosening the screw
Installation - 3396. Connect the ribbon cable to the adjacent connector pins in the GPIB board (or adjacent module). Make surethe connectors are pro
3 - Installation40Figure 3-3A. N3300A Outline DiagramFigure 3-3B. N3301A Outline Diagrammmmm mm mm mmFigure 3-3C. N3300A Connector Diagram
Installation - 341Bench OperationA fan cools the electronic load by drawing air through the top and sides and exhausting it out the back.Minimum clear
4SAFETY SYMBOLSDirect currentAlternating currentBoth direct and alternating currentThree-phase alternating currentEarth (ground) terminalProtective ea
3 - Installation42Input ConnectionsPower Cord1. Connect the power cord to the IEC 320 connector on the rear of the unit. If the wrong power cord was
Installation - 343Figure 3-6a. Manual Connector1. Strip the back wire insulation as indicatedWire Size Strip backAWG 4 6 mm (0.65 in)AWG 6 or 8 13 mm
3 - Installation44spacerwires exiting at topwires exiting at bottomsafety cover securedspacerinsulatedwire lug(AMP 52266-3)4 AWGwire max.tightencovers
Installation - 345Table 3-2. Stranded Copper Wire Ampere CapacityWire Size Ampacity Notes:AWG Cross SectionArea in mm222 5.020 8.330.75 1018 15.41 13
3 - Installation46Control ConnectorA 14-pin connector and a quick-disconnect mating plug are provided on each module for connecting remotesense leads,
Installation - 347Sense SwitchA local/remote sense switch is provided on each module. Unless you are using remote sensing, make sure thatthe sense sw
3 - Installation48Computer ConnectionsThe electronic load can be controlled through a GPIB interface or through an RS-232 interface.GPIB InterfaceEach
Installation - 349Application ConnectionsLocal Sense ConnectionsFigure 3-10 illustrates a typical setup with module number 1 connected for constant cu
3 - Installation50Figure 3-11. Remote SensingFigure 3-12. Parallel OperationN3300AN3300A
Installation - 351In Figure 3-12, all lead connections are terminated at the source. Each module is connected to the source usingseparate wires. Usi
5Declaration PageDECLARATION OF CONFORMITYAccording to ISO/IEC Guide 22 and CEN/CENELEC EN 45014Manufacturer's NameAgilent Technologies, Inc.Manu
534Turn-On CheckoutIntroductionSuccessful tests in this chapter provide a high degree of confidence that the electronic load is operating properly.For
4 - Turn-On Checkout546.Depress the Meter key followed bythe scroll key. 1 50 W The display shows the computed inputpower for the selected channe
555Front Panel OperationIntroductionHere is what you will find in this chapter:• A complete description of the front panel controls• Front panel pro
5 - Front Panel Operation56jjjjDisplay15-character fluorescent display for showing measurements and programmed values.kkkkAnnunciatorsAnnunciators lig
Front Panel Operation - 557System KeysRefer to the examples later in this chapter for more details on the use of these keys.SYSTEM Local Recall Ident
5 - Front Panel Operation58Function keysRefer to the examples later in this chapter for more details on the use of these keys.FUNCTION Meter Protect S
Front Panel Operation - 559Scrolling Keys Scrolling keys let you move through the commands in the presently selected functionmenu. Press ▼ to bring
5 - Front Panel Operation60Input Control KeysInput control keys control the input functions of the electronic load.Press this key to select another ch
Front Panel Operation - 561Transient Control KeysTransient control keys control the transient functions of the electronic load.Press this key to acces
5 - Front Panel Operation62Entry Keys Enter7894561230. Input Input E - Clear EntryFigure 5-4 Entry KeysThese keys perform two functions. In Meter mod
6Acoustic Noise InformationHerstellerbescheinigungDiese Information steht im Zusammenhang mit den Anforderungen der Maschinenläminformationsverordnung
Front Panel Operation - 563Examples of Front Panel ProgrammingYou will find these examples on the following pages:1. Using the front panel display.2.
5 - Front Panel Operation6410. On the Function keypad, press Input On/Off to turn input on. Dis annunciator off11. To make minor changes to an existi
Front Panel Operation - 5653 - Programming Transient OperationTransient operation can be used in the CC, CR or CV mode. It causes the selected channel
5 - Front Panel Operation66Set transient operation for Pulse modeIn this example, assume that the CC mode is active, the slew rate is at the factory d
Front Panel Operation - 567Figure 5-7. Toggled Transient OperationAction Display1. On the Function keypad, press Current. On the Entry keypad, press
5 - Front Panel Operation68Trigger01 2 3 4 5List Count = 1 List Count = 2Figure 5-8. List SequenceAction Display4. Access the List menu again and pres
Front Panel Operation - 5695 - Querying and Clearing Output Protection and ErrorsWhen overvoltage, overcurrent, or overtemperature condition occurs, t
5 - Front Panel Operation70Action Display1.Displays the minimum currentDisplays the rms voltageDisplays the input powerDisplays the maximum powerDispl
71ASpecificationsTable A-1 lists the specifications for the different load models. Specifications indicate warranted performance inthe 25°C ±5°C regio
A - Specifications72Table A-1. Specifications (continued)N3302A N3303A N3304A N3305A N3306AConstant Current Mode2Low Range/High Range 3A / 30A 1A / 1
7Table of ContentsWarranty Information ...
Specifications - A73Table A-2 lists the supplemental characteristics, which are not warranted but are descriptions of typicalperformance determined ei
A - Specifications74Table A-2. Supplemental Characteristics (continued)N3302A N3303A N3304A N3305A N3306ARipple and Noise (20Hz-10MHz) Current (rms
75BPerformance Test and Calibration ProceduresIntroductionThis appendix contains test procedures for checking the operation and calibration of the Agi
B - Performance Test and Calibration76Performance TestsIMON Zero VerificationThis test verifies that IMON Zero is within calibration. IMON zero must b
Performance Test and Calibration - B776. Press [ CURR ] [ 1 ] ( except N3303A press [ CURR ] [ 0.1 ] ). Press [ CURR ]. Scroll until display reads C
B - Performance Test and Calibration784. Turn on the power source. Set the power source voltage and current to the values listed in the following tab
Performance Test and Calibration - B79CR Mode TestsThese tests verify that the module operates in CR mode and the resistance programming is within spe
B - Performance Test and Calibration806. Set power source voltage and current values as listed in following table.N3302A N3303A N3304A N3305A N3306AP
Performance Test and Calibration - B816. Set power source voltage and current values as listed in following table.N3302A N3303A N3304A N3305A N3306AP
B - Performance Test and Calibration82Pulse Width AccuracyThis test verifies that the transient generator pulse width accuracy is within specification
8Cleaning ...
Performance Test and Calibration - B83Agilent N3302A Verification Test RecordTest Description MinimumSpecificationResults MaximumSpecificationConstant
B - Performance Test and Calibration84Agilent N3303A Verification Test RecordTest Description MinimumSpecificationResults MaximumSpecificationConstant
Performance Test and Calibration - B85Agilent N3304A Verification Test RecordTest Description MinimumSpecificationResults MaximumSpecificationConstant
B - Performance Test and Calibration86Agilent N3305A Verification Test RecordTest Description MinimumSpecificationResults MaximumSpecificationConstant
Performance Test and Calibration - B87Agilent N3306A Verification Test RecordTest Description MinimumSpecificationResults MaximumSpecificationConstant
B - Performance Test and Calibration88N330xA Module (top view)Figure B-1. I MON ZERO CALIBRATIONAgilent 3458 or34401 DVMINPUT TERMINALSMUST BE OPEN
Performance Test and Calibration - B89+ _N330xA ModuleFigure B-3. VOLTAGE CALIBRATIONAgilent 3458 or34401 DVM + _N330xA ModuleFigure B-4. RESI
B - Performance Test and Calibration90CalibrationParameters CalibratedThe following parameters may be calibrated.• External Current Monitor ( Imon )
Performance Test and Calibration - B91IMON, IPROG and CURRENT Calibration Program10 ! This program will calibrate Imon, Iprog and Current20 ! for lo
B - Performance Test and Calibration92540 INPUT "Enter value of high range current shunt in ohms",Rshunt550 DISP "You have entered &q
9PERFORMANCE TEST AND CALIBRATION PROCEDURES ... 75Introduction ...
Performance Test and Calibration - B931110 !1120 OUTPUT @Ld;"CAL:IPR:LEV P4"1130 !1140 PRINT TABXY(20,20),"Calibrating IMON & IP
B - Performance Test and Calibration941690 CLEAR SCREEN1700 !1710 OUTPUT @Ld;"INP:STAT ON"1720 OUTPUT @Ld;"CAL:LEV P1"1730 !1
Performance Test and Calibration - B95VOLTAGE Calibration Program10 ! This program calibrates the voltage mode for load modules20 ! N3302A, N3303A,
B - Performance Test and Calibration96540 !550 INPUT "Measure voltage at +/- sense terminals and enter value in volts",Vp1560 !570 OUTPUT
Performance Test and Calibration - B97RESISTANCE Calibration Program10 ! This program calibrates the resistance mode20 ! for load modules N3302A, N3
B - Performance Test and Calibration98550 PRINT TABXY(10,12);"Set power source to voltage and current settings fromTable B-2"560 PRINT TAB
Performance Test and Calibration - B991080 Rp2=Vt2/Ip21090 OUTPUT @Ld;"CAL:DATA";Rp21100 OUTPUT @Ld;"INP:STAT OFF"1110 !1120 ! *
B - Performance Test and Calibration1001620 CLEAR SCREEN1630 !1640 PRINT TABXY(10,12);"Set power source to voltage and current settings from&q
101Index-- -- -- -- --, 6900 ... 9, 6288mm screw terminal connector, 43Aaccessories, 20airflow, 41annunciatorsAddr, 56Cal, 56CC, 56CR, 56CV, 56Dis, 56
Index102GGPIB, 70address, 70connections, 48ground, earth, 20guide, user’s, 19Hhistory, 6Iinputcurrent setting, 63resistance setting, 63voltage setting
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