Manuale d’uso / di manutenzione del prodotto 6050A del fabbricante Agilent Technologies
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Operating Manual Agilent Technologies Electronic Load Mainframes Models 6050A and 6051A For instruments with Serial Numbers: Agilent 6050A-2908A-00101 and Above Agilent 6051A-2927A-00101 and Above Agilent Part No. 5959-3368 Printed in USA: October, 1997 Microfiche Part No.
2 CERTIFICATION Agilent Technologies certifies that this product met its published specifications at time of shipment from the factory. Agilent Technologies further certifies that its calibration meas.
3 SAFETY SUMMARY The following general safety precautions must be observed during all phases of operation, service, and repair of this instrument. Failure to com ply with these precautions or with specific warnings elsewhere in this m anual violates safety standards of design, m anufacture, and intended use of the instrument.
4 SAFETY SUMMARY (continued) GENERAL Any LEDs used in this product are Class 1 LEDs as per IEC 825-l. ENVIRONMENTAL CONDITIONS This instruments is intended for indoor use in an installation category II, pollution degree 2 environment. It is designed to operate at a maximum relative humidity of 95% and at altitudes of up to 2000 meters.
5 DECLARATION OF CONFORMITY according to ISO/IEC Guide 22 and EN 45014 Manufacturer’s Name : Agilent Technologies, Inc. Manufacturer’s Address: New Jersey Division 150 Green Pond Road Rockaway, NJ 07866 U.
6 If you are a first-time user, start with this manual, paying particular attention to Chapter 2. After installation (Chapter 3), read Chapter 4 to learn front-panel operation. Programming users should then read Chapter 5 before going to the Programming Reference Guide.
7 Table of Contents 1. General Information What’s in this Manual ....................................................................................................... ......................... 11 Options ...........................................
8 Table of Contents (continued) Overcurrent.............................................................................................................................................. 29 Overpower ....................................................
9 Table of Contents (continued) Examples ................................................................................................................................................. 56 Setting CR Values ...........................................
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General Information 11 1 General Information What’s In This Manual This manual applies to both the Agilent 6050A and Agilent 6051A Electronic Load mainframes. The two mainframes are functionally identical, but the Agilent 6051A is a half-rack width unit, with only two slots for load modules.
12 General Information Safety Requirements This product is a Safety Class 1 instrument, which means that it is provided with a protective earth ground terminal.
General Information 13 Table 1-1. Agilent 6050A/6051A Specifications and Supplemental Characteristics (continued) Weight: Net (mainframe only): Agilent 6050A, 9.5 kg (21 lb.) Agilent 6051A, 5.5 kg (12 lb.) Shipping: Agilent 6050A, 14 kg (31 lb.) Agilent 6051A, 7.
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Operation Overview 15 2 Operation Overview Introduction The Agilent 6050A and Agilent 6051A Multiple Input Electronic Load Mainframes are used for design, manufacturing, and evaluation of dc power supplies, batteries, and power components.
16 Operation Overview Front Panel Description The front panel includes a 12-character alphanumeric display, 11 status indicators, and four groups of keypads. Ordinarily the alphanumeric display shows the number of the channel presently under front-panel control, and the input voltage and current of that channel.
Operation Overview 17 operation, protection features, and other operating features of the Electronic Load. Extended Power Operation Note: Extended power operation is not available on "B " load modules (Agilent Models 60501B-60507B). In addition, this feature may not be present in "A" modules produced after 1989.
18 Operation Overview When programmed to a mode, a module remains in that mode until the mode is changed or until a fault condition, such as an overpower or overtemperature, occurs. When changing modes, the module’s input is momentarily disabled (non-conducting state) before the new mode is enabled.
Operation Overview 19 Electronic Load are described later in this chapter. The Electronic Load has a status reporting capability to keep track of pending triggers and other operating conditions. The status reporting capability is described in detail in the Agilent Electronic Loads Programming Reference Guide.
20 Operation Overview Ranges Resistance may be programmed in any of three overlapping ranges (low, middle, high). The range can be set at the front panel ( , , and ENTRY keys) or via the GPIB ( RES:RANG command). Any value in the low range selects the low range.
Operation Overview 21 Figure 2-4. Constant Voltage Mode Immediate Voltage Level The voltage level can be set at the front panel ( and ENTRY keys) or via the GPIB ( VOLT command). If the CV mode is the active mode, the new setting immediately changes the input at a rate determined by the voltage slew setting.
22 Operation Overview Continuous Transient Operation In continuous operation, a repetitive pulse train switches between two load levels. Continuous transient operation is selected via the GPIB using the TRAN:MODE CONT command.
Operation Overview 23 b. One pulse results from each trigger. Therefore, frequency cannot be programmed. The main level, transient level, and slew rate are programmed as described for continuous operation. The pulse width is programmable from 0.00005 to 4 seconds via the GPIB ( TRAN:TWID command).
24 Operation Overview HPSL Command Description TRIG:SOUR EXT Selects the external trigger input source. TRAN:MODE TOGG Selects toggled operation. CURR 5 Sets main current level to 5 amps. CURR:TLEV 10 Sets transient current level to 10 amps. TRAN ON Turns on transient operation.
Operation Overview 25 The rear-panel TRIGGER connector also provides a trigger output signal. This signal is generated synchronously with the trigger signal sent by the mainframe to the modules. The trigger output signal can be used to trigger an external device such as an oscilloscope, DVM, or another Electronic Load mainframe.
26 Operation Overview Input Current, Voltage, and Power Measurement Each module’s input current, voltage, and power can be measured at the front panel ( key) or via the GPIB ( MEAS command).
Operation Overview 27 The actual value of the electronic short is dependent on the mode and range that are active when the short is turned on. In CV mode it is equivalent to programming zero volts. In CC mode it is equivalent to programming full-scale current for the present current range.
28 Operation Overview The SYST:ERR? query (or key) reads back the errors in the order in which they occurred (the error queue can hold up to 30 entries). Once the error is read back it is removed from the list. A value 0 indicates there is no error; and 0 will be returned when all errors in the list have been read.
Operation Overview 29 Overvoltage The overvoltage protection circuit is set at a predetermined voltage, which cannot be changed. If the overvoltage circuit has tripped, the module will attempt to limit the voltage by drawing current from the DC source.
30 Operation Overview If the hardware power-limit circuit becomes active, it attempts to limit power by limiting the current drawn by the load. Once the power has been returned to the safe operating area, the protective circuit allows the current to rise again.
Operation Overview 31 External Programming Input CC and CV modes can be programmed with a signal (ac or dc) connected to the Ext Prog input. A 0-to-10V external signal corresponds to the 0-to-full scale input range in CV mode or in CC mode.
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Installation 33 3 Installation Introduction This chapter discusses how to install the modules and make connections to the rear panel of your Agilent 6050A or Agilent 6051A Electronic Loads. A turn-on checkout procedure as well as application considerations for specific operating modes are also discussed.
34 Installation has only enough room for two single-width modules or one double-width module. The module installation procedure is the same for both mainframes. Figure 3-1. Power Cord Configurations Procedure 1. With the mainframe off, disconnect the power cord and remove the top cover by loosening the thumbscrews.
Installation 35 5. Lock the module in place using the quarter-turn locking fastener and the rear panel thumbscrew. Hand- tighten only. 6. Connect the three ribbon cables to the adjacent connector pins in the GPIB board (or adjacent module). Make sure the connectors are properly seated.
36 Installation Cooling The Electronic Loads can operate without loss of performance within the temperature range of 0 ° to 40 ° C, and with derated performance from 40 ° to 55 ° C. However, you must install your Electronic Load in a location that allows sufficient space at the top, sides, and rear of the unit for adequate air circulation.
Installation 37 • Check that the unit has been factory set to the correct line voltage. Refer to the factory check mark on the rear panel LINE label next to the power connector. • Check that the power cord is connected to the ac input socket. SHOCK HAZARD The power cord provides a chassis ground through a third conductor.
38 Installation Turn-On/Selftest Turn on the Electronic Load using the LINE switch on the front panel and observe the display. Immediately after turn-on, the Electronic Load undergoes a selftest that checks the GPIB interface board as well as the input circuitry of the installed modules.
Installation 39 Power Test Note The following checkout assumes that the Electronic Load is set to the factory defaults. Refer to Chapter 4 if you need to recall the factory default values. Use a power supply with the voltage set to 10 V and the current limit set to 10 A to check the input circuit on each module.
40 Installation GPIB Address The GPIB address of the Electronic Load is factory set to address 5. The GPIB address can only be set using the front panel and ENTRY keys. Chapter 4 explains how to change the GPIB address. Rear Panel Connectors and Switches Figure 3-8 shows the rear panel of the Agilent 6050A Electronic Load.
Installation 41 3. Hand tighten the adjustment knob to secure the wire in the binding post. If you are using a slotted screwdriver, tighten the knob to 8 in. -lbf for a secure connection.. Do not use lubricants or contact cleaners on the binding posts.
42 Installation Figure 3-10. Control Connector and Cover +Sand -S Used to connect the remote sense leads to the power source. Pin + S connects the + S signal and pin - S connects the - S signal. Remote sensing can only be used in CV and CR modes. IM and VM (pins Al and A2) Used to monitor the module’s input current and voltage.
Installation 43 Trigger Connector A four-pin connector and a quick connect mating plug (Agilent part number 1252-1488) are provided on each mainframe for input and output trigger signals (see Figure 3-11). The mating plug is packaged in an envelope that is included with the mainframe.
44 Installation Table 3-1. Stranded Copper Wire Ampere Capacity Wire Size Ampacity Notes: AWG Cross Section Area in mm 2 1. Ratings for AWG-sized wires derived from MIL-W-5088B. Ratings for metric-sized wires derived from IEC Publication 22 5.0 33-51.
Installation 45 Table 3-2. Maximum Wire Lengths to Limit Voltage Drops Wire Size Resistivity Maximum Length in Meters (Feet) to Limit Voltage Drop to 0.5 V or Less Cross Section AWG Area in mm2 Ω /kft Ω /km 5 A 10 A 20 A 30 A 40 A 50 A 60 A 22 16.
46 Installation Figure 3-12. Local Sensing Figure 3-13. Remote Sensing.
Installation 47 Figure 3-14. Parallel Operation Figure 3-15. Zero-Volt Loading.
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Local Operation 49 4 Local Operation Introduction Chapter 2 Operation Overview introduced you to the Multiple Electronic Load’s features and capabilities and briefly described how to control a module locally from the front panel and remotely with a computer via the GPIB.
50 Local Operation Table 4-1. Controls and Indicators (continued) Item Description 3 Electronic Load Status Annunicators CC -Indicates the selected channel is in the constant current (CC) mode. Note that Figure 4-1 illustrates that channel 1 is in the CC mode (CC annunciator is on).
Local Operation 51 Table 4-1. Controls and Indicators (continued) Item Description 6 CHAN Keys Used in conjunction with the ENTRY keys to select a channel (module) for front panel control and/or display. - Identifies which module is installed in the selected input channel.
52 Local Operation Table 4-1. Controls and Indicators (continued) Item Description 7 FUNCTION Keys (continued) - Displays the selected channel’s active mode: CC (MODE CURR), CR (MODE RES), or CV (MODE VOLT). The active mode can be changed using the CURR, RES, or VOLT key followed by the Enter key.
Local Operation 53 With local control in effect, you can select a channel and use the front panel display to view the input voltage/current values and the computed power value as well as certain fault and status conditions that may be present. This is referred to as the metering mode.
54 Local Operation Selecting the Channel You can select a channel in either of two ways: 1. You can use the Channel key in conjunction with the ENTRY keys to select a channel. For example, to select channel 1 press: 2. You can use the and keys to increment ( ) and decrement ( ) the channel number.
Local Operation 55 Figure 4-2. Recommended Programming Sequence.
56 Local Operation Note The CC, CR, and CV values described in subsequent paragraphs can be programmed whether or not the associated mode is active. When a mode is selected, all of the associated values will take effect at the input provided that the input is turned on.
Local Operation 57 b. Select the low range by pressing c. Press and check that the display indicates "C:RNG" and the maximum low range value. This means that the low range is selected. 2. Set Main Level a. Press and note that the display indicates "CURR" and the minimum low range CC value.
58 Local Operation "RES 50.000" - main level is 50 ohms. "R:TLV 40.000" - transient level is 40 ohms. "C:SLW.50000" - slew rate is 0.5 A/ µ s (middle resistance range uses the CC slew rate setting). If you now select the low range (0 to 1 ohm, R:RNG 1.
Local Operation 59 and the maximum voltage slew rate. The Multiple Electronic Load automatically selects the voltage slew rate when the low resistance range is selected. b. Set the slew rate to 0.25 V/ µ s by pressing c. Press and again and check that the display indicates "V:SLW 0.
60 Local Operation You can see the VOLT setting being incremented or decremented each time you press the applicable Input key. The values are entered automatically (you don’t press the Enter key). Remember if the CV mode is active, the incremented or decremented values will immediately change the actual input.
Local Operation 61 1. Setup CC Values a. Set the main CC level to 1 amp, the transient CC level to 2 amps, and the slew rate to 0. 15 A/ µ s. See examples under Setting CC Values . b. Turn on CC mode by pressing: 2. Set frequency to 5 kHz by pressing: 3.
62 Local Operation Using The System Keys These keys consist of Local, Address, Error (shifted Address key), Recall, Save (shifted Recall key), and the blue shift key (bottom key in the SYSTEM column). The Local key and the Shift key have already been discussed.
Local Operation 63 Settings stored in registers 1 through 6 will be lost when the Electronic Load’s power is cycled. When power is turned off and then on again, each of these registers (1 through 6) will be set to the "wake-up" values.
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Remote Operation 65 5 Remote Operation Introduction Chapter 4 - Local Operation described how to program the Multiple Electronic Load manually using the front panel keys.
66 Remote Operation Sending A Remote Command To send the Multiple Electronic Load a remote command, combine your computer’s output statement with the GPIB interface select code, the GPIB device (Multiple Electronic Load) address, and finally the Multiple Electronic Load’s HPSL command.
Remote Operation 67 Remote Programming Commands The Multiple Electronic Load command set consists of more than 60 HPSL compatible commands. The HPSL commands have many optional key words which can be used to document your programs.
68 Remote Operation indicated by the value 9.9E + 37 instead of the normal voltage or power readings. This is the IEEE 488.2 value for positive infinity. CC Mode Example This example selects channel 1, sets the current level to 1.25 amps and then reads back the actual current value.
Remote Operation 69 Figure 5-1. Remote Programming Flowchart (Sheet 1).
70 Remote Operation Figure 5-1. Remote Programming Flowchart (Sheet 2).
Remote Operation 71 CR Mode Example This example selects channel 1, sets the current protection limit to 2 amps, programs the resistance level to 100 ohms, and reads back the computed power. See Appendix A for considerations regarding high-resistance applications.
72 Remote Operation Pulsed Transient Operation Example This example selects channel 1, sets the CR levels, selects the bus as the trigger source, sets the fastest slew rate, programs a pulse width of 1 millisecond, and turns on transient operation. When the *TRG command is received, a 1 millisecond pulse is generated at the channel 1 input.
Remote Operation 73 140 OUTPUT 705; "TRIG:SOUR TIM" 150 END Line 10: Selects channel 1 and turns the input off. Line 20: Selects the CV mode. Line 30: Sets the main voltage level to 5 volts. Line 40: Sets the transient voltage level to 10 volts and the voltage slew rate to maximum.
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Calibration 75 6 Calibration Introduction This chapter describes the calibration procedures for the Agilent 6050A and 6051A Electronic Load mainframe and its associated modules. Both "A" modules (Agilent Models 60501A-60504A) and "B" modules (Agilent Models 60501B- 60507B) are covered in separate procedures.
76 Calibration Table 6-1. Equipment Required for Calibration Equipment Characteristics Recommended Model Shunts 0.1 Ω @ 15 A, 0.04% @ 25 W Guildline 9230/15 0.01 Ω @ 100 A, 0.04% @ 100 W Guildline 9230/100 0.001 Ω @ 300 A, 0.04% @ 100 W Guildline 9230/300 Voltmeter dc accuracy of 0.
Calibration 77 CAL ibration: SAVE Writes the present calibration constants into the EEprom. This command does not have to be sent until all ranges and modes have been calibrated. If the unit is turned off before CAL:SAVE is sent, the new calibration constants are lost.
78 Calibration Figure 6-2. Calibration Flowchart for "A" Modules.
Calibration 79 Figure 6-2. Calibration Flowchart for "A" Modules (continued).
80 Calibration Figure 6-2. Calibration Flowchart for "A" Modules (continued).
Calibration 81 Program Listing for "A" Modules 10 Load=705 20 Chan= 1 30 OUTPUT Load;"CHAN";Chan;";CAL ON" 40 Cal_curr(Load,Chan,Hi_curr_rng,Hi_curr_hipt,Hi_curr_lopt,l);.
82 Calibration Program Listing for "A" Modules (continued) 510 PRINT "VOLTAGE CALIBRATION" 520 PRINT "Set power supply according to module calibration table" 530 PRINT &q.
Calibration 83 Program Listing for "A" Modules (continued) 1030 IF Flag THEN 1040 OUTPUT Load;"RES";Res_hipt 1050 ELSE 1060 OUTPUT Load;"RES";Res_lopt 1070 END IF 1080 OU.
84 Calibration LINE 610 Set low calibration point LINE 630 Send measurement in volts for low main calibration point LINE 640 Send measurement in volts for low readback calibration point LINE 680 Set l.
Calibration 85 Figure 6-3. Calibration Flowchart for "B" Modules.
86 Calibration Figure 6-3. Calibration Flowchart for "B" Modules (continued).
Calibration 87 Figure 6-3. Calibration Flowchart for "B" Modules (continued).
88 Calibration Program Listing for "B" Modules 10 ASSIGN @Ld TO 705 20 Chan=l 30 OUTPUT @Ld;”CHAN”;Chan;”;CAL ON" 40 Cal_curr(@Ld,Chan,Hi_curr_rng,Hi_curr_offset,l) 50 Cal_curr(@L.
Calibration 89 Program Listing for "B" Modules (continued) 530 OUTPUT @Ld;"*TRG" 540 IF Flag THEN WAIT 30 550 INPUT "Enter current through shunt for high point in amps",T.
90 Calibration Program Listing for "B" Modules (continued) 1040 ! 1050 SUB Cal_res(@Ld,Chan,Res_rng,Res_hipt,Res_lopt,Flag) 1060 PRINT "RESISTANCE CALIBRATION, RANGE";Res_rng 1070 .
Considerations For Operating In Constant Resistance Mode 91 A Considerations For Operating In Constant Resistance Mode The Agilent Electronic Loads implement Constant Resistance. (CR) mode by using either the CV circuits or CC circuits to regulate the input.
92 Considerations For Operating In Constant Resistance Mode If large resistances are required, the accuracy can be improved by reading the voltage and current directly from the load, calculating the actual resistance, and then adjusting the programmed value accordingly.
Index 93 INDEX A aliases .......................................................................................................................................................................... 16 ampere-capacity ....................................
94 Index INDEX (continued) front panel display ............................................................................................................ ..................................... 49, 52 FUNCtion .........................................
Index 95 INDEX (continued) O oscillation .................................................................................................................... ................................................ 29 OUTPut ..................................
96 Index INDEX (continued) setting CC values .............................................................................................................. ........................................... 56 setting CR values ..............................
Agilent Sales and Support Offices 97 Agilent Sales and Support Offices For more information about Agilent Technologies test and measurement products, applications, services, and for a current sales office listing, visit our web site: http://www.agilent.
Manual Updates The following updates have been made to this manual since the print revision indicated on the title page. 4/15/00 All references to HP have been changed to Agilent.
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Se non hai ancora comprato il Agilent Technologies 6050A è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Agilent Technologies 6050A - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Agilent Technologies 6050A imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Agilent Technologies 6050A ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Agilent Technologies 6050A, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Agilent Technologies 6050A.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Agilent Technologies 6050A. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Agilent Technologies 6050A insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
