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Manual Agilent n3305a
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2 Warranty Information CERTIFICATION Agilent Technologies certifies that this product met its published specifications at time of shipment from the factory. AgilentTechnologies further certifies that its calibration measurements are traceable to the United States National Institute ofStandards and T...
3 Safety Summary The following general safety precautions must be observed during all phases of operation of this instrument. Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design, manufacture, and intended use of the instrume...
5 Declaration Page DECLARATION OF CONFORMITY According to ISO/IEC Guide 22 and CEN/CENELEC EN 45014 Manufacturer's Name Agilent Technologies, Inc. Manufacturer's Address 140 Green Pond RoadRockaway, New Jersey 07866U.S.A. declares that the Products Product Names a) dc Electronic Load Mainframesb) dc...
6 Acoustic Noise Information Herstellerbescheinigung Diese Information steht im Zusammenhang mit den Anforderungen der Maschinenl ä minformationsverordnung vom 18 Januar 1991. * Schalldruckpegel Lp <70 dB(A)* Am Arbeitsplatz* Normaler Betrieb* Nach EN 27779 (Typpr ü fung). Manufacturer's Declarat...
7 Table of Contents Warranty Information ........................................................................................................................................................... 2Safety Summary ..........................................................................................
11 1 Quick Reference The Front Panel -At a Glance j 15-character display showschannel, voltage and currentmeasurements. k Annunciators indicate operating modes and statusconditions. l System keys: ♦ Return to Local mode. ♦ Set the GPIB address. ♦ Set the RS-232 interface. ♦ Display SCPI error codes....
1 - Quick Reference 12 The Rear Panel At a Glance Q Control connector R Input binding post S GPIB connector T RS-232 interface connector 1 2 3 4 5 6 7 U Power cord connector V Trigger/Digital connector W Sense switch Instrument Configuration Use the front panel Address menu to ♦ Select GPIB or RS-23...
Quick Reference - 1 13 Front Panel Number Entry Enter numbers from the front panel as follows: Use the Entry Scroll keys to adjust the input setting in Meter mode. If CC is lit, the input current changes. If CV is lit, the input voltage changes. If CR is lit, the input resistance changes. NOTE The i...
1 - Quick Reference 14 Front Panel Annunciators φφφφ 1 A list is initiated or running. Prot Indicates that a channel protection feature is activeon any channel. Press the Prot Clear key to clearthe protection condition. CV The selected input channel is in theconstant voltage (CV) mode. Cal Calibrati...
Quick Reference - 1 15 Front Panel Menus - At a Glance ADDRESS 5 Sets the GPIB Address INTF GPIB Selects an interface (GPIB or RS232) BAUDRATE 300 Selects baud rate (300, 600, 1200, 2400, 4800, 9600) * PARITY NONE Selects message parity (NONE, EVEN, ODD, MARK, SPACE) * FLOW NONE Selects flow control...
1 - Quick Reference 16 Front Panel Menus - continued VOLT Sets the input voltage V:MODE Sets the voltage mode (FIXED, LIST) V:RANG Sets the input voltage range V:SLEW Sets voltage slew rate V:SLW:N Sets voltage slew rate for negative transitions V:SLW:P Sets voltage slew rate for positive transition...
Quick Reference - 1 17 SCPI Programming Commands - At a Glance NOTE Most [optional] commands have been omitted for clarity. Refer to the Programming Guide fora complete description of all programming commands. ABORt CALibrate :DATA <n> [,<n>] :IMON:LEVel <points> :IPRog:LEVel <p...
1 - Quick Reference 18 SCPI Commands - continued [SOURce:]LIST (continued) :VOLTage [:LEVel] <n> {,<n>} :POINts? :RANGe <n> {,<n>} :POINts? :SLEW [:BOTH] <n> {,<n>} :POINts? :NEGative <n> {,<n>} : POSitive <n> {,<n>} :TLEVel <n> {,<...
19 2 General Information Document Orientation This manual describes the operation of the Agilent Model N3300A, N3301A, N3302A, N3303A N3304A,N3305A and N3306A DC Electronic Loads. Unless otherwise noted, all units will be referred to by thedescription "electronic load" throughout this manual...
2 - General Information 20 Safety Considerations This electronic load is a Safety Class 1 instrument, which means it has a protective earth terminal. That terminalmust be connected to earth ground through power source equipped with a ground receptacle. Refer to the SafetySummary page at the beginnin...
General Information - 2 21 The N3301A is a DC Electronic Load Mainframe that is functionally identical to the N3300A, but is a half-rackwidth with only two slots for load modules. The mainframe can dissipate up to 300 watts per slot, to a total of600 watts for a fully loaded mainframe. The N3302A, N...
2 - General Information 22 Operating Modes The three modes of operation are: ♦ Constant current (CC). ♦ Constant voltage (CV). ♦ Constant resistance (CR). When programmed to a mode, a module remains in that mode until the mode is changed or until a faultcondition, such as an overpower or overtempera...
General Information - 2 23 Triggered Current Level A current level can be preset (stored in the electronic load) allowing the input to be updated when a trigger isreceived instead of immediately as described above. If the CC mode is the active mode, the preset current level will become the actual va...
2 - General Information 24 Figure 2-2. Constant Resistance Mode Immediate Resistance Level The resistance level can be set at the front panel or via the GPIB ( RES command). If the CR mode is active, the new setting immediately changes the input at a rate determined by the voltage or current slew se...
General Information - 2 25 ( VOLT:RANG command). When you program a voltage value, the electronic load automatically selects the range that corresponds to the value that you program. If the value falls in a region where ranges overlap, theelectronic load selects the Low range. If the present input s...
2 - General Information 26 Transient Operation Transient operation enables the module to periodically switch between two load levels, as might be required fortesting power supplies. A power supply's regulation and transient characteristics can be evaluated by monitoringthe supply's output voltage un...
General Information - 2 27 List Operation List mode lets you generate complex sequences of input changes with rapid, precise timing, which may besynchronized with internal or external signals. This is useful when running test sequences with a minimumamount of programming overhead. You can program up...
2 - General Information 28 If the ac line is selected via the GPIB as the trigger source, triggers will be generated once for each cycle of acinput power. An ac line frequency of 60 Hz produces a trigger period of 16.67 ms; 50 Hz line frequencyproduces a trigger period of 20 ms. The rear-panel TRIGG...
General Information - 2 29 Therefore, both minimum transition time and slew rate must be considered when determining the actualtransition time. This is shown in Figure 2-8, which shows the minimum transition time for a given slew rate as ahorizontal line, and at about a 13.3% or greater load change,...
2 - General Information 30 Input Control Short On/Off A module can simulate a short circuit at its input by turning the load on with full-scale current. The short circuitcan be toggled on/off at the front panel using the SHORT command in the Func menu, or via the GPIB ( INPUT:SHORT ON|OFF command). ...
General Information - 2 31 Caution To protect the electronic load from possible damage, the input voltage must not exceed themaximum input voltage rating specified in the module-specific pages supplied with eachmodule. Never apply the ac line voltage to a module's input connectors. Overvoltage The o...
2 - General Information 32 remain set until they are reset. If the OT condition still exists when the reset is executed, the module's input willremain off. You must wait until the module cools down before you can reset the OT circuit. The fan(s) willcontinue to operate to cool the unit as quickly as...
General Information - 2 33 Saving and Recalling Settings The electronic load has internal registers in which settings (mode, current, voltage, resistance, slew, transientlevel, etc.) for each module can be saved. By saving settings and recalling them later you can saveprogramming time. The present s...
2 - General Information 34 20A Input (programmed via GPIB or front panel)± 1V (2 V peak-peak) 1 kHz external programming signal The external programming signal (+ 1 and - 1 volt) corresponds to + 6 and - 6 amps at the input (1 volt externalprogramming input = 1/10 full scale). Therefore, the input v...
37 3 Installation Inspection Damage When you receive your electronic load, inspect it for any obvious damage that may have occurred duringshipment. If there is damage, notify the shipping carrier and nearest Agilent Sales and Support Officeimmediately. The list of Agilent Sales and Support Offices i...
3 - Installation 38 Installing the Modules Procedure 1. With the mainframe off, disconnect the power cord and remove the top cover by loosening the screws with aflat-bladed screwdriver. 2. Remove any packing material from inside the mainframe. 3. Grasp the module using the quarter-turn locking faste...
Installation - 3 39 6. Connect the ribbon cable to the adjacent connector pins in the GPIB board (or adjacent module). Make surethe connectors are properly seated. 7. If applicable, install each module in the slot next to the previous module in the same manner (step 3 through6). 8. Replace the top c...
Installation - 3 41 Bench Operation A fan cools the electronic load by drawing air through the top and sides and exhausting it out the back.Minimum clearances for bench operation are 1 inch (25 mm) along the sides. Do not block the fan exhaust at the rear of the unit. Rack Mounting The N3300A electr...
3 - Installation 42 Input Connections Power Cord 1. Connect the power cord to the IEC 320 connector on the rear of the unit. If the wrong power cord wasshipped with your unit, contact your nearest Agilent Sales and Support Office (refer to the list at the back ofthis guide) to obtain the correct cor...
Installation - 3 43 Figure 3-6a. Manual Connector 1. Strip the back wire insulation as indicatedWire Size Strip back AWG 4 6 mm (0.65 in) AWG 6 or 8 13 mm (0.5 in) AWG 10 or smaller 10 mm (0.4 in) 2. AWG 4 is the maximum wire size. Stranded copper wire size, AWG 6 or 8 is the recommended wire. Ifyou...
3 - Installation 44 spacer wires exiting at top wires exiting at bottom safety cover secured spacer insulated wire lug (AMP 52266-3) 4 AWG wire max. tighten cover screw insert tabs spacer (0380-4835) conical washer (3050-1924) breakaway tab cover (5040-1736) connector assembly with bolt (5040-1739) ...
Installation - 3 45 Table 3-2. Stranded Copper Wire Ampere Capacity Wire Size Ampacity Notes: AWG Cross SectionArea in mm 2 22 5.0 20 8.33 0.75 10 18 15.4 1 13.5 16 19.4 1.5 16 14 31.2 2.5 25 12 40 4 32 10 55 6 40 8 75 10 63 6 100 4 135 1. Ratings for AWG-sized wires derived from MIL-W-5088B. Rating...
3 - Installation 46 Control Connector A 14-pin connector and a quick-disconnect mating plug are provided on each module for connecting remotesense leads, external V/I monitors, an external programming input, and external control lines (see figure 3-7).The mating plug is packaged in an envelope that ...
Installation - 3 47 Sense Switch A local/remote sense switch is provided on each module. Unless you are using remote sensing, make sure thatthe sense switch is set to LCL (depressed). Remote sensing is used in certain applications to achieve greateraccuracy (refer to Remote Sense Connections for mor...
3 - Installation 48 Computer Connections The electronic load can be controlled through a GPIB interface or through an RS-232 interface. GPIB Interface Each electronic load has its own GPIB bus address, which can be set using the front panel Address key as described in Chapter 5. GPIB address data is...
Installation - 3 49 Application Connections Local Sense Connections Figure 3-10 illustrates a typical setup with module number 1 connected for constant current or constantresistance operation. Local sensing is used in applications where lead lengths are relatively short, or where loadregulation is n...
Installation - 3 51 In Figure 3-12, all lead connections are terminated at the source. Each module is connected to the source usingseparate wires. Using the source as the current distribution point allows larger wires to be used for each moduleconnection and also reduces the common impedance inheren...
53 4 Turn-On Checkout Introduction Successful tests in this chapter provide a high degree of confidence that the electronic load is operating properly.For verification tests, see Appendix B. NOTE : This chapter provides a preliminary introduction to the electronic load front panel. See Chapter5 for ...
4 - Turn-On Checkout 54 6. Depress the Meter key followed bythe scroll key. 1 50 W The display shows the computed inputpower for the selected channel. 7. Repeat steps 3 through 6 for anyother modules in the mainframe. 8. Turn off electronic load, disconnectpower supply and continue withrear panel co...
55 5 Front Panel Operation Introduction Here is what you will find in this chapter: • A complete description of the front panel controls • Front panel programming examples. NOTE : The electronic load must be set in Local Mode to use the front panel controls. Press the Localkey on the front panel to ...
Front Panel Operation - 5 57 System Keys Refer to the examples later in this chapter for more details on the use of these keys. SYSTEM Local Recall Ident Address Error Save Figure 5-2. System Keys This is the blue, unlabeled key, which is also shown as shift in this guide. Pressing thiskey accesses ...
5 - Front Panel Operation 58 Function keys Refer to the examples later in this chapter for more details on the use of these keys. FUNCTION Meter Protect Sense Channel Channel Prot Clear Func Res Current Input on/off Voltage Tran Step Step List TriggerControl Trigger Figure 5-3. Function Keys Immedia...
Front Panel Operation - 5 59 Scrolling Keys Scrolling keys let you move through the commands in the presently selected functionmenu. Press ▼ to bring up the next command in the list. Press ▲ to go back to the previous command in the list. Function menus are circular; you can return to the startingpo...
5 - Front Panel Operation 60 Input Control Keys Input control keys control the input functions of the electronic load. Press this key to select another channel. Enter the channel number using the Entry Keys.(This key performs the same function as ▼ Channel .) Press this key to access the current men...
Front Panel Operation - 5 61 Transient Control Keys Transient control keys control the transient functions of the electronic load. Press this key to access the function menu. Display Command Function TRAN <value> Sets the current of inputT:DCYC Sets the current mode to FIX or LIST T:FREQ Sets ...
5 - Front Panel Operation 62 Entry Keys Enter 7 8 9 4 5 6 1 2 3 0 . Input Input E - Clear Entry Figure 5-4 Entry Keys These keys perform two functions. In Meter mode, these keys can be used to adjustthe present input current, voltage, or resistance - depending on which function ispresently active (i...
Front Panel Operation - 5 63 Examples of Front Panel Programming You will find these examples on the following pages:1. Using the front panel display. 2. Programming constant current, voltage, and resistance modes. 3. Programming transient operation. 4. Programming lists. 5. Querying and Clearing Ou...
Front Panel Operation - 5 65 3 - Programming Transient Operation Transient operation can be used in the CC, CR or CV mode. It causes the selected channel to switch betweentwo load levels. Set transient operation for Continuous mode In the following example, assume that the CC mode is active, the sle...
5 - Front Panel Operation 66 Set transient operation for Pulse mode In this example, assume that the CC mode is active, the slew rate is at the factory default setting (maximumrate), and the applicable transient operation parameters have been set as follows: pulse mode, main current level= 5 A, tran...
Front Panel Operation - 5 67 Figure 5-7. Toggled Transient Operation Action Display 1. On the Function keypad, press Current . On the Entry keypad, press 5 Enter . CURR 5 2. On the Function keypad, press Current . On the Function keypad, press • key until transient current is displayed. C:TLEV 3. On...
Front Panel Operation - 5 69 5 - Querying and Clearing Output Protection and Errors When overvoltage, overcurrent, or overtemperature condition occurs, the Prot annunciator on the front panel will be on and the electronic load will disable its output. Error messages can occur at any time during the ...
5 - Front Panel Operation 70 Action Display 1. Displays the minimum currentDisplays the rms voltageDisplays the input powerDisplays the maximum powerDisplays the minimum power Use and to scroll through the measurement selections <chan> <value> A MIN<chan> <value> A RMS<cha...
71 A Specifications Table A-1 lists the specifications for the different load models. Specifications indicate warranted performance inthe 25 ° C ± 5 ° C region of the operating temperature range. Specifications apply to normal and transient modes unless otherwise noted. Table A-1. Specifications N33...
75 B Performance Test and Calibration Procedures Introduction This appendix contains test procedures for checking the operation and calibration of the Agilent N330xA SeriesElectronic Load Modules. The tests are performed using the front panel keypad of the N3300A or N3301AMainframes. The required te...
B - Performance Test and Calibration 76 Performance Tests IMON Zero Verification This test verifies that IMON Zero is within calibration. IMON zero must be in calibration to perform the tests inthis section. If the IMON value is not within calibration, go to the calibration section of this appendix ...
Performance Test and Calibration - B 77 6. Press [ CURR ] [ 1 ] ( except N3303A press [ CURR ] [ 0.1 ] ). Press [ CURR ]. Scroll until display reads C:RANG,press [ 1 ] [ Enter ]. Press shift key, [ Sense ] scroll till display reads S:C:RNG press [ 1 ] [ Enter ]. 7. Checking low current range, low in...
Performance Test and Calibration - B 79 CR Mode Tests These tests verify that the module operates in CR mode and the resistance programming is within specification.The programmed resistance values are checked by recording the voltage across the current monitor resistor andthe input voltage (voltage ...
Performance Test and Calibration - B 81 6. Set power source voltage and current values as listed in following table. N3302A N3303A N3304A N3305A N3306A Power Source Voltage Setting 50V 96V 20V 50V 20V Power Source Current Setting 3.5A 1A 3A 3.5A 3.5A 7. Wait 3 seconds. Calculate and record resistanc...
Performance Test and Calibration - B 83 Agilent N3302A Verification Test Record Test Description Minimum Specification Results Maximum Specification Constant Current Mode Tests 30 Ampere Range Programming and Readback Low Current ( 1 A ) Front Panel Display High Current ( 30 A ) Front Panel Display3...
B - Performance Test and Calibration 84 Agilent N3303A Verification Test Record Test Description Minimum Specification Results Maximum Specification Constant Current Mode Tests 10 Ampere Range Programming and Readback Low Current ( 1 A ) Front Panel Display High Current ( 10 A ) Front Panel Display1...
Performance Test and Calibration - B 85 Agilent N3304A Verification Test Record Test Description Minimum Specification Results Maximum Specification Constant Current Mode Tests 60 Ampere Range Programming and Readback Low Current ( 1 A ) Front Panel Display High Current ( 60 A ) Front Panel Display6...
B - Performance Test and Calibration 86 Agilent N3305A Verification Test Record Test Description Minimum Specification Results Maximum Specification Constant Current Mode Tests 60 Ampere Range Programming and Readback Low Current ( 1A ) Front Panel Display High Current ( 60 A ) Front Panel Display6 ...
Performance Test and Calibration - B 87 Agilent N3306A Verification Test Record Test Description Minimum Specification Results Maximum Specification Constant Current Mode Tests 120 Ampere Range Programming and Readback Low Current ( 1A ) Front Panel Display High Current ( 120 A ) Front Panel Display...
B - Performance Test and Calibration 88 N330xA Module (top view) Figure B-1. I MON ZERO CALIBRATION Agilent 3458 or 34401 DVM INPUT TERMINALS MUST BE OPEN + _ N330xA Module (rear view) Figure B-2. I MON / EXT PRG and CURRENT CALIBRATION Agilent 3458 or 34401 DVM A11 A9 Iprog Power Source + & DVM...
B - Performance Test and Calibration 90 Calibration Parameters Calibrated The following parameters may be calibrated. • External Current Monitor ( Imon ) • External Current Programming ( Iprog ) • Input Current • Input Voltage • Input Resistance You do not have to do a complete calibration each time...
Performance Test and Calibration - B 91 IMON, IPROG and CURRENT Calibration Program 10 ! This program will calibrate Imon, Iprog and Current 20 ! for load modules N3302A, N3303A, N3304A, N3305A and N3306A. 30 ! 40 ! last update 9/6/00 50 ! 60 ! Edit the interface address on line 100 if different the...
Performance Test and Calibration - B 95 VOLTAGE Calibration Program 10 ! This program calibrates the voltage mode for load modules 20 ! N3302A, N3303A, N3304A, N3305A and N3306A. 30 ! 40 ! last update 9/6/00 50 ! 60 ! Edit the interface address on line 100 if different then 705 70 ! 80 ASSIGN @Ld TO...
Performance Test and Calibration - B 97 RESISTANCE Calibration Program 10 ! This program calibrates the resistance mode 20 ! for load modules N3302A, N3303A, N3304A, N3305A and N3306A. 30 ! 40 ! last update 9/27/00 50 ! 60 ! The variables for the module to be calibrated must be inserted 70 ! in the ...
101 Index -- -- -- -- -- , 69 0 0 ... 9 , 62 8 8mm screw terminal connector, 43 A accessories , 20 airflow , 41 annunciators Addr , 56 Cal , 56 CC , 56 CR , 56 CV , 56 Dis , 56 Err , 56 Prot , 56 Rmt , 56 Shift , 56 SRQ , 56 Tran , 56 Unr , 56 B binding posts, 42 C cables , 20 calibration equipment ...
104 Agilent Sales and Support Office For more information about Agilent Technologies test and measurement products, applications, services, and fora current sales office listing, visit our web site: http://www.agilent.com/find/tmdir You can also contact one of the following centers and ask for a tes...
Manual Updates The following updates have been made to this manual since its publication. 6/1/01 Table 2-1 has been updated with new option part numbers. Information about Option UJ1 has been added to chapters 2 and 3. Information about Low Voltage Operation has been has been added to the end of cha...
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