Agilent Technologies 6050A Operating Manual Download Page 1

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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. 5959-3369 Reprinted April, 2000

Summary of Contents for 6050A

Page 1: ...oad 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...

Page 2: ...ned to Customer from another country Agilent Technologies shall pay for return of products to Customer Warranty services outside the country of initial purchase are included in Agilent Technologies pr...

Page 3: ...nt and internal adjustments must be made by qualified service personnel Do not replace components with power cable connected Under certain conditions dangerous voltages may exist even with the power c...

Page 4: ...ive earth ground terminal Out position of a bi stable push control Frame or chassis terminal On supply Terminal for Neutral conductor on permanently installed equipment Off supply Terminal is at earth...

Page 5: ...Agilent Technologies GmbH Department TRE Herrenberger Strasse 130 D 71034 Boeblingen FAX 49 7031 14 3143 Printing History The current edition of this guide is indicated below Reprints of this guide co...

Page 6: ...on Procedures Front Panel Operation Remote Programming Introduction Calibration Procedures Module Specific Pages Agilent Models 60501A B 60502A B 60503A B 60504A B 60507B Specifications Programming Ra...

Page 7: ...ce CR Mode 19 Ranges 20 Immediate Resistance Level 20 Triggered Resistance Level 20 Transient Resistance Level 20 Slew Rate 20 Constant Voltage CV Mode 20 Range 20 Immediate Voltage Level 21 Triggered...

Page 8: ...lftest 38 Power Test 39 Controller Connection 39 GPIB Address 40 Rear Panel Connectors and Switches 40 Input Binding Posts 40 Control Connector 41 Sense Switch 41 Trigger Connector 43 Application Conn...

Page 9: ...s 63 5 Remote Operation Introduction 65 Enter Output Statements 65 GPIB Address 65 Sending A Remote Command 66 Selecting A Channel 66 Getting Data Back 66 Remote Programming Commands 67 CC Mode Exampl...

Page 10: ......

Page 11: ...load modules in the mainframe controller and application connections and turn on checkout procedures Chapter 4 Local Operation describes in detail how to operate the Electronic Load at the front pane...

Page 12: ...s the specifications and supplemental characteristics for the Agilent 6050A 6051A Electronic Load mainframe All specifications apply over an operating range of 0 to 55 C for the mainframe Specificatio...

Page 13: ...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 5 kg 17 lb Dimensions Width Agilent 6050A 425 5 mm 16 75 in Agilent 6051A 213 mm...

Page 14: ......

Page 15: ...ual input voltage and current and extensive protection and status reporting capability The mainframe contains two one cooling fans whose speed automatically increases or decreases as the module temper...

Page 16: ...for each module Three commands have aliases for compatibility with other HPSL instruments MODE can also be called FUNCtion INPut can also be called OUTPut and CHANnel can also be called INSTrument OUT...

Page 17: ...rd more power than its nominal power rating for a limited time In effect each module has two power limit curves as shown in Figure 2 1 Whether the module is operating with the nominal power limit curv...

Page 18: ...e high range Changing the range affects the module in the same manner as changing modes i e it causes the input to go through a non conducting state Note that the values of the present current setting...

Page 19: ...f operation not just the CC mode The software current limit feature is described later in this chapter under Protection Features Slew Rate Slew rate determines the rate at which the current input to a...

Page 20: ...ode is not the active mode the preset resistance level will become the actual value when a trigger occurs but there will be no effect on the input until the CR mode becomes active Once a level is trig...

Page 21: ...d This slew rate remains in effect for the immediate triggered and transient voltage level changes described above There are 12 discrete slew rates that can be programmed for CV Mode slew rate Any sle...

Page 22: ...continuous operation Sets main current level to 5 amps Sets transient current level to 10 amps Sets transient generator frequency to 1 kHz Sets transient generator duty cycle to 40 Turns on transient...

Page 23: ...ain current level setting 5 amps When the transient mode is turned on and an external trigger signal is received the input level starts increasing at a rate determined by the slew rate When the value...

Page 24: ...e not presently active the preset levels will not take effect at the input until the applicable mode becomes active Triggering a transient pulse Generates a transient pulse of programmable width when...

Page 25: ...e the transition from one setting to another is small the small signal bandwidth of the load limits the minimum transition time for all programmable slew rates Because of this limitation the actual tr...

Page 26: ...ts dc input voltage current or power by sending the appropriate query command e g MEAS CURR The results will be read back when the Electronic Load is addressed to talk Voltage and current measurements...

Page 27: ...Saving and Recalling Settings The Electronic Load has internal registers in which settings mode current voltage resistance slew transient level etc for each module can be saved By saving settings and...

Page 28: ...or faults are most critical in your application you can use one branch to localize selected faults quickly and use the other branch for broader fault reporting By knowing that only a particular fault...

Page 29: ...moved Software In addition to the hardware overcurrent protection circuit the Electronic Load allows the user to define a current protection limit in software which will shut down a module s input if...

Page 30: ...nes are connected with the wrong polarity If a reverse voltage RV condition is detected turn off power to the dc source and the Electronic Load and make the correct connections The Electronic Load con...

Page 31: ...kHz external programming signal The external programming signal and 1 volt corresponds to and 6 amps at the input 1 volt external programming input 1 10 full scale Therefore the input varies 6 A at t...

Page 32: ......

Page 33: ...ain the correct cord see Figure 3 1 for the part number and order option Trigger Connector A 4 pin trigger connector is shipped with your mainframe This connector is discussed later in this chapter Co...

Page 34: ...disconnect the power cord and remove the top cover by loosening the thumbscrews 2 Remove any packing material from inside the mainframe 3 Grasp the module using the quarter turn locking fastener and t...

Page 35: ...ule next to the GPIB board is always channel number one Numbering continues sequentially so that the module furthest from the GPIB board is the highest numbered channel in your system Figure 3 3 shows...

Page 36: ...oad can also be mounted in a standard 19 inch rack panel or enclosure using a Option 908 rack mount kit see Figure 3 4 A rack mount kit for joining two half rack units is available as Option 800 Optio...

Page 37: ...s indicated on the rear panel LINE label If the factory check mark on this label does not correspond to your nominal line voltage change the line voltage as follows l With the mainframe off disconnect...

Page 38: ...hannel Errors Display Description Display Description ERROR 1 RAM failure 1 ERROR 100 Self test error ERROR 2 ROM failure 1 ERROR 101 Secondary RAM failure ERROR 3 GPIB failure 1 ERROR 102 Secondary R...

Page 39: ...ode The Electronic Load front panel display should appear about the same as the one shown in Figure 3 7 Figure 3 7 Power Test Display 5 Depress the key 6 Observe that the front panel display indicates...

Page 40: ...ng posts and are provided on each module for connecting the input wires to the Electronic Load see Figure 3 9 Connections are made as follows 1 Strip back the wire insulation as indicated Wire Size St...

Page 41: ...s connected to the control connector should be twisted and shielded to maintain the instrument s specified performance Make all wire connections to the mating plug as required see Figure 3 10 before y...

Page 42: ...mode can be programmed with a 0 V to 10 V signal ac or dc This signal can act alone or can be combined with values programmed over the GPIB Thus it is possible to superimpose an ac signal upon a dc l...

Page 43: ...tronic Load is triggered with a GPIB command or TRIG IN signal This signal can be used to trigger external equipment such as oscilloscopes digitizers or another Electronic Load Com pin 3 Provides the...

Page 44: ...g compensates for the voltage drop in applications that require long lead lengths It is only useful when module 1 is operating in CV or CR mode or when using voltage readback The sense switch must be...

Page 45: ...4 9 3 46 3 30 2 5 8 21 12 2 6 1 3 0 2 0 1 52 1 22 1 01 12 1 589 62 5 31 15 5 10 5 7 9 6 29 5 24 4 5 09 19 6 9 8 4 9 3 3 2 46 1 96 1 64 10 0 9994 100 50 25 17 12 5 10 00 8 34 6 3 39 29 14 7 7 4 4 9 3 6...

Page 46: ...46 Installation Figure 3 12 Local Sensing Figure 3 13 Remote Sensing...

Page 47: ...Installation 47 Figure 3 14 Parallel Operation Figure 3 15 Zero Volt Loading...

Page 48: ......

Page 49: ...locally using the controls and indicators on the front panel As shown in Figure 4 1 the front panel s controls and indicators include a 12 segment LCD display and a keypad having four groups of keys...

Page 50: ...ic Load is addressed to talk or to listen over the GPIB SRQ Indicates that the Multiple Electronic Load is requesting service over the GPIB i e the service request line SRQ is active 5 SYSTEM Keys Ret...

Page 51: ...iator is on while transient operation is on Transient operation causes the module s input to periodically switch between two levels Displays the selected channel s transient level for current C TLV re...

Page 52: ...ys simulate front panel control knobs They can be used to change the main level or the transient level of the function shown on the display The new values are entered automatically Enter key is not us...

Page 53: ...ation Overview in this guide When programming the Multiple Electronic Load remotely you can use the Multiple Electronic Load s status reporting capability to check the state of the protection features...

Page 54: ...ent while you are setting up your test program Programming is then accomplished by selecting a mode of operation CC CR or CV and setting the desired values for range if applicable the main operating l...

Page 55: ...Local Operation 55 Figure 4 2 Recommended Programming Sequence...

Page 56: ...es for the selected channel are programmed by pressing the applicable FUNCTION keys and setting the desired values using the ENTRY keys The display identifies the selected function for example C SLW i...

Page 57: ...dule being programmed 4 Set Transient Level The transient current level is meaningful only if transient operation described later is turned on Remember that you set the main current level to 1 amp in...

Page 58: ...aximum low range value This means the low range is presently selected 2 Set Main Level a Press and note that the display indicates RES and the maximum low range resistance value b Set the main resista...

Page 59: ...ng c Press again and note that the display indicates R TLV 0 4000 Note that you can use the Input ENTRY keys to increment and decrement the transient resistance level Operation is similar to that desc...

Page 60: ...and note that the display indicates V TLV and the maximum voltage value b Set the transient voltage level to 30 volts by pressing c Press again and note that the display indicates V TLV 30 000 You can...

Page 61: ...ng mode Note that INPUT OFF takes precedence over SHORT ON Pressing the Short On Off key with certain user applications may cause damage to the equipment being tested which may result in personal inju...

Page 62: ...ey shifted Errors are recorded in a list and are displayed in the order in which they occurred Each time the shifted Error key is pressed an error code is displayed Once an error is displayed it is re...

Page 63: ...f and on the Multiple Electronic Load s modules will be set to the values you saved register 0 The Save 0 operation takes a few seconds to complete Do not turn power off until the SAVE 0 message goes...

Page 64: ......

Page 65: ...les for use with any other language or computer Enter Output Statements You need to know the statements your computer uses to output and enter information For example the Agilent BASIC language statem...

Page 66: ...as well as the actual input voltage and current or computed input power of any channel It can also return information relating to the internal operation and module identification associated with any c...

Page 67: ...ots 3 Transient levels The transient CC or CV level must be set to a higher level than the respective main level In the low range the transient CR level must be set to a higher level than the main CR...

Page 68: ...mps Line 60 Turns on the input Line 70 Measures the actual input current and stores it in a buffer inside the Multiple Electronic Load Line 80 Reads the input current value into variable A in the comp...

Page 69: ...Remote Operation 69 Figure 5 1 Remote Programming Flowchart Sheet 1...

Page 70: ...70 Remote Operation Figure 5 1 Remote Programming Flowchart Sheet 2...

Page 71: ...input Line 80 Reads the computed input power value and stores it in a buffer inside the Multiple Electronic Load Line 90 Reads the computed input power level into variable A in the computer Line 100 D...

Page 72: ...trigger source Line 60 Sets the CC slew rate to the maximum value Remember that in the high resistance range the CC slew rate is used Line 70 Selects pulsed transient operation and sets the pulse wid...

Page 73: ...channel 1 input Line 70 Selects channel 2 and turns the input off Line 80 Selects the CV mode Line 90 Sets the main voltage level to 10 volts Line 100 Sets the transient voltage level to 20 volts and...

Page 74: ......

Page 75: ...n DAC requires two operating points to be calibrated for each range a high point and a low point The transient DAC requires only the high operating point to be calibrated for each range it uses the sa...

Page 76: ...low level value is not less than the high level value Both high and low CAL LEV commands must be sent before the constants are recalculated and stored in RAM CALibration TLEVel HIGH NRf Enters the ac...

Page 77: ...This is because the readback setups are the same as the setups for the high current and voltage ranges Another shortcut is that the same values are used to calibrate the main DAC as well as the readba...

Page 78: ...78 Calibration Figure 6 2 Calibration Flowchart for A Modules...

Page 79: ...Calibration 79 Figure 6 2 Calibration Flowchart for A Modules continued...

Page 80: ...80 Calibration Figure 6 2 Calibration Flowchart for A Modules continued...

Page 81: ...TPUT Load CURR Curr_hipt 240 IF Flag THEN WAIT 30 250 INPUT Enter current through shunt for high point in amps Hipt_curr 260 OUTPUT Load CAL LEV HIGH Hipt_curr 270 IF Flag THEN OUTPUT Load CAL MEAS HI...

Page 82: ...ts for trans point in volts Trans_volts 750 OUTPUT Load CAL TLEV Trans_volts 760 OUTPUT Load TRAN OFF 770 PRINT Test unit to verify that transient values are in spec 780 PRINT Press CONTINUE when read...

Page 83: ...e LINE 110 Turn calibration mode off LINE 140 Current calibration subroutine LINE 200 220 Select channel current mode and range LINE 230 Set high calibration point LINE 240 If high current range wait...

Page 84: ...e LINE 870 890 Select channel resistance mode and range LINE 900 Set high calibration point LINE 930 940 Calculate and send measurement in ohms for high main calibration point LINE 950 Set low calibra...

Page 85: ...Calibration 85 Figure 6 3 Calibration Flowchart for B Modules...

Page 86: ...86 Calibration Figure 6 3 Calibration Flowchart for B Modules continued...

Page 87: ...Calibration 87 Figure 6 3 Calibration Flowchart for B Modules continued...

Page 88: ...ng 260 INPUT Enter current through shunt for low point in amps Lopt_curr 270 OUTPUT Ld CAL LEV LOW Lopt_curr 280 OUTPUT Ld CURR 85 Curr_rng 290 IF Flag THEN WAIT 25 300 INPUT Enter current through shu...

Page 89: ...nput terminals for high point in volts Hipt_volts 780 OUTPUT Ld CAL LEV HIGH Hipt_volts 790 OUTPUT Ld CAL MEAS HIGH Hipt_volts 800 OUTPUT Ld VOLT Volt_lopt 810 WAIT 3 820 INPUT Enter voltage across in...

Page 90: ...Enter current through current shunt in amps Lopt_curr 1210 Lopt_res Lopt_volt Lopt_curr 1220 OUTPUT Ld CAL LEV LOW Lopt_res 1230 PRINT Test unit to verify resistance values 1240 PRINT Press CONT when...

Page 91: ...s regulator circuits become errors at the input terminals of the load In both CV and CC modes the offset is constant across the specified operating range and can be accounted for during calibration Th...

Page 92: ...er is programmed in ohms Therefore to compute the contribution of offset error to programmed value error the programmed value must be reciprocated first The offset is then applied to the programmed va...

Page 93: ...ower 53 computed power value 53 connector cover 42 constant current CC mode 18 constant resistance CR mode 19 91 constant voltage CV mode 20 continuous transient operation 22 71 control connector 30 4...

Page 94: ...immediate voltage level 21 input connections 40 INPUT OFF 53 input on off 27 54 INSTrument 16 K keypad 49 L LCD display 49 50 line fuses 38 line switches 37 49 line voltage 37 local control 16 local s...

Page 95: ...amming mode 49 protection features 28 53 protection shutdown 53 pulse delay 23 pulse width 23 pulsed transient operation 22 72 Q query 66 questionable status 27 R rack mounting 36 reading remote progr...

Page 96: ...chronous transient operation 72 system keys 50 62 T toggled transient operation 23 72 transient current level 19 transient generator 21 transient operation 21 60 transient resistance level 20 transien...

Page 97: ...6 U S A tel 305 267 4245 fax 305 267 4286 Canada Agilent Technologies Canada Inc 5150 Spectrum Way Mississauga Ontario L4W 5G1 tel 1 877 894 4414 Australia New Zealand Agilent Technologies Australia P...

Page 98: ...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 ch...

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