Agilent 5951-2826 - Manual

6 Table of Contents 1. General Information What’s in this Manual ....................................................................................................... ......................... 9 Reader Path ..............................................................................................

General Information 9 1 General Information What’s In This Manual This chapter contains specifications that apply to the Single Input Electronic Load Family as well as information concerningoptions and safety requirements. The remaining chapters in this manual contain instructions for installing, op...

10 General Information Safety Requirements This product is a Safety Class 1 instrument, which means that it is provided with a protective earth ground terminal. Thisterminal must be connected to an ac source that has a 3-wire ground receptacle. Review the instrument rear panel and thismanual for saf...

General Information 11 Table 1-1. Specifications (continued) DERATED CURRENT DETAIL 6060B 6063B CONSTANT CURRENT MODE Ranges Low Range: 0 to 6 A 0 to 1 A High Range: 0 to 60 A 0 to 10 A Accuracy (after 30 sec wait): ± 0.1% ± 75 mA ± 0.15% ± 10 mA both ranges both ranges Regulation: 10 mA both ranges...

12 General Information Table 1-1. Specifications (continued) TRANSIENT CURRENT LEVEL Ranges Low Range: 0 to 6 A 0 to 1 A High Range: 0 to 60 A 0 to 10 A Accuracy Low Range: ± 0.1% ± 80 mA ± 0.18% ± 13 mA High Range: ± 0.1% ± 350 mA ± 0.18% ± 50 mA 6060B 6063B TRANSIENT RESISTANCE LEVEL Ranges Low Ra...

General Information 13 Table 1-2. Supplemental Characteristics 6060B 6063B CONSTANT CURRENT MODE Resolution Low Range: 1.6 mA 0.26 mA High Range: 16 mA 2.6 mA Temperature Coefficient 100 ppm/ ° C ± 5 mA/ ° C 150 ppm/ ° C ± 1 mA/ ° C both ranges both ranges CONSTANT RESISTANCE MODE Resolution Low Ran...

14 General Information Table 1-2. Supplemental Characteristics (continued) 6060B 6063B VOLTAGE READBACK Resolution: 17 mV (via GPIB) 67 mV (via GPIB) 20 mV (front panel) 100 mV (front panel) Temperature Coefficient: 50 ppm/ ° C ± 1.2 mV/ ° C 100 ppm/ ° C ± 8 mV/ ° C Maximum Readback Capability : 65 ...

General Information 15 Table 1-2. Supplemental Characteristics (continued) Fuse : The ac input is protected by a fuse located in a module on the rear panel; 0.5AM for l00/120 Vac input; 0.25AM for 220/240 Vac input. Maximum VA: 60 Peak Inrush Current: 2.5 A (typical) PROGRAMMABLE SLEW RATE: (For any...

16 General Information Table 1-2. Supplemental Characteristics (continued) Voltage Slew Rate: 6060B (0 to 60V) 6063B (0 to 240V) Transition Rate # Voltage Step Voltage Step Time* 1 1 V/ms 4 V/ms 8.0 ms 2 2.5 V/ms 10 V/ms 3.2 ms 3 5 V/ms 20 V/ms 1.6 ms 4 10 V/ms 40 V/ms 800 µ s 5 25 V/ms 100 V/ms 320...

General Information 17 Table 1-2. Supplemental Characteristics (continued) SOURCE TURN-ON CURRENT OVERSHOOT (In CC and CR modes when connected to power supplies with voltage rise times of greater than 500 µ s) 6060B 6063B <10% <5% PROGRAMMABLE SHORT CIRCUIT 0.033 ohm (0.02 ohm typ) 0.20 ohm (0...

Operation Overview 19 2 Operation Overview Introduction The Electronic Load is used for design, manufacturing, and evaluation of dc power supplies, batteries, and powercomponents. The primary operating features of the Electronic Load are: constant current (CC) mode, constant voltage (CV)mode, or con...

20 Operation Overview Local/Remote Control Local (front panel) control is in effect immediately after power is applied. The front panel keypad and display allow manualcontrol when the Electronic Load is used in bench test applications. Remote (computer) control goes into effect (front panelRmt annun...

Operation Overview 21 Figure 2-1. Constant Current Mode Immediate Current Level The current level can be set at the front panel ( and ENTRY keys) or via the GPIB ( CURR command). If the CC mode is the active mode, the new setting immediately changes the input at a rate determined by the slew setting...

22 Operation Overview Slew Rate Slew rate determines the rate at which the input level changes to a new programmed value. Slew rate can be set at the frontpanel ( , and ENTRY keys) or via the GPIB ( CURR:SLEW command). This slew rate remains in effect for the immediate, triggered, and transient leve...

Operation Overview 23 Triggered Resistance Level The resistance level can be preset (stored in the Electronic Load) allowing the input level to change when a trigger isreceived instead of immediately as previously described. The resistance level can only be preset via the GPIB (RES:TRIGcommand). The...

24 Operation Overview 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 level at a rate determined by the voltage slewsetting. If the load is not ...

28 Operation Overview In cases where the transition from one setting to another is large, the actual transition time can be calculated by dividing thevoltage or current transition by the slew rate. The actual transition time is defined as the time required for the input tochange from 10% to 90% or f...

Operation Overview 31 Protection Features The Electronic Load includes the following protection features: • Overvoltage • Overcurrent (hardware and software) • Overpower (hardware and software) • Overtemperature • Reverse Voltage The appropriate bits in the status registers are set when any of the a...

32 Operation Overview If the software overcurrent limit is exceeded and persists beyond the specified delay time, the input is turned off. Also, forthese conditions, the OC and PS (protection shutdown) status register bits are set and will remain set until the OC conditionis removed and the bits are...

34 Operation Overview Port On/Off Port is a general purpose output port that can be used to control an external device such as a relay for power supply testpurposes. The output is toggled on and off via the GPIB ( PORT0 ON | OFF command). It cannot be controlled from thefront panel. The Port output ...

Installation 35 3 Installation Introduction This chapter discusses how to install and make connections to the rear panel of your Electronic Load. A turn-on checkoutprocedure as well as application considerations for specific operating modes are also discussed. Inspection When you receive your Electr...

36 Installation Location and Cooling Table 1-1 gives the dimensions of the Electronic Load. The cabinet has plastic feet that are shaped to ensure self-alignmentwhen stacked with other Agilent System II cabinets. The feet may be removed for rack mounting. Your Electronic Loadmust be installed in a l...

38 Installation Connect The Power Cord Your Agilent Electronic Load was shipped with a power cord for the type of outlet used at your location. Connect thepower cord to the ac input socket. SHOCK HAZARD The power cord provides a chassis ground through a third conductor. Be certainthat your power out...

Installation 39 Power Test Note The following checkout assumes that the Electronic Load is set to the factory defaults listed in Table 4-6.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 t...

40 Installation Do not stack more than three connector blocks together on any GPIB connector. The resultant leverage can exert excessiveforce on the mounting panels. Make sure that all connectors are fully seated and that the lock screws are firmly hand-tightened. Use a screwdriver only for the remo...

44 Installation Application Connections Wiring Considerations FIRE HAZARD To satisfy safety requirements, load wires must be heavy enough not to overheatwhile carrying the short-circuit output current of the device connected to the Electronic Load. Refer toTable 3-1 for the ampere capacity of variou...

Installation 45 Parallel Connections Figure 3-13 illustrates how Electronic Loads can be paralleled for increased power dissipation. Up to six Electronic Loadscan be directly paralleled in CC or CR mode. Units cannot be paralleled in CV mode. Each Electronic Load will dissipate the power it has been...

46 Installation Figure 3-11. Local Sensing Figure 3-12. Remote Sensing

Installation 47 Figure 3-13. Parallel Operation Figure 3-14. Zero-Volt Loading

Local Operation 49 4 Local Operation Introduction The “Operation Overview” chapter introduced you to the Electronic Load's features and capabilities and briefly describedhow to control the unit locally from the front panel and remotely with a computer via the GPIB. This chapter describes ingreater d...

50 Local Operation Table 4-1. Controls and Indicators (continued) Item Description 3 Electronic Load Status Annunicators CC-Indicates the Electronic Load is in the constant current (CC) mode. Note that Figure 4-1 shows the Electronic Load is in the CC mode (CC annunciator is on). CR-Indicates the El...

Local Operation 51 Table 4-1. Controls and Indicators (continued) Item Description 6 FUNCTION Keys - Returns the display to the metering function selected, the display will show the measured input voltage and current, the computed input power, or certain status conditions (e.g.INPUT SHORT ON, OC, et...

52 Local Operation Table 4-1. Controls and Indicators (continued) Item Description 6 FUNCTION Keys (continued) - Displays the resistance setting. (e.g. RES 1000). This setting can be changed using the ENTRY keys. The RES key also selects the CR mode (MODE RES) in conjunction with theMODE and Enter k...

Local Operation 53 • "INPUT OFF" (if active) • "SHORT ON" • Volts/Amps input metering, for example, "9.99 0.99" • Computed power value, for example "9.9 WATTS" • Protection Features (if any are active): "VF"-voltage fault"OV"-overvoltage"RV"-re...

54 Local Operation Note The CC, CR, and CV values described in subsequent paragraphs can be programmed whether or not theassociated mode is active. When a mode is selected, all of the associated values will take effect at theinput provided that the input is turned on. Figure 4-2. Recommended Program...

Local Operation 55 Setting the Mode of Operation The present (active) mode of operation is indicated by the appropriate annunciator being on (e.g. CC). The active mode canalso be viewed on the display by pressing . For example, "MODE CURR" indicates that the CC mode is active. You can change...

Local Operation 57 b. Press again and note that the display indicates "C:TLV 1.0000". Note that you can use the Input ENTRY keys to increment and decrement the transient current level. Operation is similar to that described above for the main current level. Setting CR Values The CR values ar...

Local Operation 59 4. Set Transient Level-The transient resistance level "R:TLV" is meaningful only if transient operation (described later) is turned on.a. Set the transient level to 0.8 ohm by pressing . Remember that in the low range the transient level must be set higher than the main le...

60 Local Operation Note that you can use the ENTRY keys to increment ( ) or decrement ( ) the main VOLT level setting. You can see the VOLT setting being incremented or decremented one step at a time each time you press the applicable Input key.The values are entered automatically. (You don’t press ...

Local Operation 61 a. Set the main CC level to 0.5 amps, the transient CC level to 1 amp, and the slew rate to 0. 0025 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. Set duty cycle to 25% by pressing: (blue shift key) (shifted)...

62 Local Operation Setting The Electronic Load’s GPIB Address Before you can program the Electronic Load remotely via a GPIB computer, you must know its GPIB address. You canfind this out by pressing . The Electronic Load’s GPIB address will be displayed; for example "ADDRESS 5". The Electro...

Remote Operation 65 5 Remote Operation Introduction Chapter 4 - Local Operation described how to program the Electronic Load manually using the front panel keys. Thischapter describes the fundamentals of programming the Electronic Load remotely from a GPIB controller The similaritiesbetween local an...

66 Remote Operation Sending A Remote Command To send the Electronic Load a remote command, combine your computer’s output statement with the GPIB interface selectcode, the GPIB device (Electronic Load) address, and finally the Electronic Load’s HPSL command. For example, to setthe input current of a...

68 Remote Operation Figure 5-1. Remote Programming Flowchart (Sheet 1)

Remote Operation 69 Figure 5-1. Remote Programming Flowchart (Sheet 2)

Calibration 75 6 Calibration Introduction This chapter describes the calibration procedures for the Electronic Load and gives a sample calibration program. TheElectronic Load should be calibrated annually, or whenever certain repairs are made (refer to the Service Manual).Calibration is accomplished...

76 Calibration Figure 6-1. Calibration Equipment Setup Calibration Commands The following calibration commands are required to calibrate the Electronic Load. They are used in the program examplesincluded in this section. Refer to the Agilent Electronic Loads Programming Reference Guide for HPSL comm...

Calibration 77 CALibration:SAVEWrites the present calibration constants into the EEPROM. This command does not have to be sent until all ranges andmodes have been calibrated. If the unit is turned off before CAL:SAVE is sent, the new calibration constants are lost Calibration Flowcharts The flowchar...

78 Calibration Table 6-2. Calibration Information 6060B 6063B Ranges and Calibration Points Variables Variable Values Power Supply Settings Current Shunt Variable Values Power Supply Settings Current Shunt High Current Range Hi_curr_rng 60 5 V/61 A 100 A 10 25 V/10.5 A 15 A High Current Offset Hi_cu...

80 Calibration Figure 6-2. Calibration Flowchart (continued)

Calibration 81 Figure 6-2. Calibration Flowchart (continued)

Calibration 83 Program Listing (continued) 520 OUTPUT @Ld;"*TRG" 530 IF Flag THEN WAIT 30 540 INPUT "Enter current through shunt for high point in amps",Trpt_curr 550 OUTPUT @Ld;"CAL:TLEV";Trpt_curr 560 OUTPUT @Ld;"TRAN OFF" 570 PRINT "Test unit to verify that tra...

84 Calibration Program Listing (continued) 1030 ! 1040 SUB Cal_res(@Ld,Chan,Res_rng,Res_hipt,Res_lopt,Flag) 1050 PRINT "RESISTANCE CALIBRATION, RANGE";Res_rng 1060 PRINT "Set power supply to calibration information table" 1070 PRINT "Press CONT when ready to continue" 1080 PA...

Considerations For Operating In Constant Resistance Mode 87 A Considerations For Operating In Constant ResistanceMode The Agilent Electronic Loads implement Constant Resistance. (CR) mode by using either the CV circuits or CC circuits toregulate the input. The low range is regulated with the CV circ...

88 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. This technique is most practic...

Index 89 INDEX A aliases .......................................................................................................................................................................... 21ampere-capacity .........................................................................................

Agilent Sales and Support Office 93 Agilent Sales and Support Offices For more information about Agilent Technologies test and measurement products, applications, services, andfor a current sales office listing, visit our web site: http://www.agilent.com/find/tmdir You can also contact one of the fo...

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.All references to HP-IB have been changed to GPIB.