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Agilent Technologies 6050A, Руководство по эксплуатации

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 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.  Any value that is within the middle range and above the maximum low-range value selects the middle range.
Any value that is within the high range and above the maximum middle-range value selects the high range.  Note that the
values of the present resistance settings may be automatically adjusted to fit within the new range.

Immediate Resistance Level

The resistance level can be set at the front panel (

 and ENTRY keys) or via the GPIB (RES command). If the CR

mode is the active mode, the new setting immediately changes the input at a rate determined by the voltage or current slew
setting (see description below). If the module is not in the CR mode, the new setting is saved for use when the mode is
changed to CR.

Triggered Resistance Level

The resistance level can be preset (stored in the Electronic Load) allowing the input to be updated when a trigger is received
instead of immediately as described above. The resistance level can only be preset via the GPIB (RES:TRIG command).
The preset capability is not available at the front panel.

If the CR mode is the active mode, the preset resistance level will become the actual value and the input will be updated
when a trigger occurs.  If the CR mode 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 triggered,
subsequent triggers will have no effect on the input unless another CURR:TRIG command is sent.

Transient Resistance Level

The transient resistance level can be set at the front panel ( 

, 

and ENTRY keys) or via the GPIB

(RES:TLEV command). The transient level and the main level are used in transient operation, which is described later in
this chapter. In the low resistance range, the transient level must be set to a higher resistance value than the main level.
However, in the middle and high resistance ranges, the transient level must be set to a lower resistance value than the main
level.

Slew Rate

Slew rate in resistance mode is not programmed in ohms/second. In the low resistance range, slew rate is programmed in
volts/second.  Whatever value is programmed for the voltage slew rate is also used for the low resistance range.

In the middle and high resistance ranges, slew rate is programmed in amps/second.  Whatever value is programmed for the
current slew rate is also used for the middle or high resistance ranges.

Constant Voltage (CV) Mode

In this mode, the module will attempt to sink enough current to control the source voltage to the programmed value (see
Figure 2-4).  The module acts as a shunt voltage regulator when operating in the CV mode.  The CV mode can be set

at the front panel ( 

, 

 and 

keys) or via the GPIB (MODE:VOLT command).  The CV mode

parameters are described in the following paragraphs.

Range

Voltage mode has only one range

Содержание 6050A

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 10: ......

Страница 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...

Страница 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...

Страница 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...

Страница 14: ......

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 32: ......

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

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

Страница 48: ......

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 64: ......

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

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

Страница 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...

Страница 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...

Страница 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...

Страница 74: ......

Страница 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...

Страница 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...

Страница 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...

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

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

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

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

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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