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Page 1: ...nderutilized and idle equipment along with credit for buybacks and trade ins Custom engineering so your equipment works exactly as you specify Critical and expedited services Leasing Rentals Demos In...

Page 2: ...DC POWER SUPPLY AGILENT MODELS 6625A 6626A 6628A and 6629A Agilent Part No 06626 90001 Microfiche Part No 06626 90002 Printed in Malaysia September 2004 Artisan Technology Group Quality Instrumentati...

Page 3: ...Warranty services outside the country of initial purchase are included in Agilent s product price only if Customer pays Agilent international prices defined as destination local currency price or U S...

Page 4: ...alified service personnel Do not replace components with power cable connected Under certain conditions dangerous voltages may exist even with the power cable removed To avoid injuries always disconne...

Page 5: ...ply Terminal for Neutral conductor on permanently installed equipment Off supply Terminal is at earth potential Used for measurement and control circuits designed to be operated with one terminal at e...

Page 6: ...omplies with the essential requirements of the Low Voltage Directive 73 23 EEC and the EMC Directive 89 336 EEC including 93 68 EEC and carries the CE Marking accordingly EMC Information ISM Group 1 C...

Page 7: ...s General operating information is also provided Chapter 5 Remote Operation Chapter 5 contains all of the information required to operate the supply remotely via a GP IB computer All of the commands t...

Page 8: ...On Your Supply 36 Normal Self Test Indications 36 Self Test Errors 37 Checking Out Your Supply Using Local Control 37 Voltage Test 38 Overvoltage Test 38 Current Test 38 Changing Resolution Range 39 I...

Page 9: ...Specifications for Series Operation 60 Bi Polar Operation 61 5 Remote Operation Introduction 63 GP IB Operation 63 Interface Functions 63 GP IB Address Selection 64 Power On Service Request PON 65 Pro...

Page 10: ...Equipment and Setup Required 91 Calibration Program 91 Alignment Program 95 B Programming With a Series 200 300 Computer Introduction 103 I O Path Names 103 Voltage and Current Programming 103 Voltag...

Page 11: ...Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Page 12: ...prefix is a number letter combination that denotes either the date of manufacture or the date of a significant design change It also indicates the country of origin Starting at 1960 26 1986 01 the fi...

Page 13: ...ent 6625A 25 W 50 W Agilent 6626A 25 W 25 W 50 W 50 W Agilent 6628A 50 W 50 W Agilent 6629A 50 W 50 W 50 W 50W Figure 1 1 Output Operating Range Output 2 of the Agilent 6625A and outputs 3 and 4 of th...

Page 14: ...a the GP IB Voltage and current programming Programmable resolution range Voltage and current measurement and readback Present and accumulated status readback Programmable service request mask Program...

Page 15: ...oard provides the interface between the user and the multiple outputs of the power supply Each output board is actually an output channel that can be individually selected and controlled over the GP I...

Page 16: ...s describe the instrument s warranted performance The service manual Option 9l0 contains procedures for verifying the performance specifications Table 1 3 lists the supplemental characteristics for th...

Page 17: ...urrent within 30 minutes after a line and or load change Expressed as a percentage of the setting plus a constant Output Noise PARD PARD replaces the former term ripple and noise PARD is the periodic...

Page 18: ...nt Maximum Output Noise PARD 20 Hz 20 MHz CV pk to pk 3 mV 3 mV 3 mV 3 mV CV rms 0 5 mV 0 5 mV 0 5 mV 0 5 mV CC rms 0 1 mA 0 1 mA 0 1 mA 0 1 mA AC Input Voltage and Frequency Nominal Line l00 120 220...

Page 19: ...ltage 0 002 0 5 mV 0 002 1 mV 0 002 0 5 mV 0 002 1 mV Current 0 01 2 A 0 01 20 A 0 01 25 A 0 01 60 A DC Floating Voltage No output terminal may be more that 240 Vdc from any other terminal or from cha...

Page 20: ...um Output Programming Response Time 6 mS 6 mS 6 mS 6 mS Settling Band 50 mV 50 mV 50 mV 50 mV Maximum Time Constant 750 S 750 S 750 S 750 S Series and Parallel operation Two outputs can be operated di...

Page 21: ...6628A Agilent 6626A 6629A Net 15 5 kg 34 lbs 17 7 kg 39 lbs Shipping 20 8 kg 46 lbs 23 kg 51 lbs Load Cross Regulation Voltage 0 25 mV 0 25 mV 0 25 mV 0 25 mV Current 0 005 mA 0 005 mA 0 01 mA 0 01 mA...

Page 22: ...General Information 21 Figure 1 4 CV Operation with Capacitive Load Stability Graph for all Outputs Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Page 23: ...General Information 22 Figure 1 5 Output Noise Typical CC Mode Figure 1 6 Output Noise Typical CV Mode Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Page 24: ...General Information 23 Figure 1 7 Output Impedance Typical Graph See Supplemental Characteristics Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

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Page 26: ...ent has to be returned to Agilent Technologies Warranty information is printed on the inside cover of this manual Remember to send a detailed description of the failure and symptoms when returning the...

Page 27: ...y you can convert the supply from one line voltage setting to another by following the instructions under LINE VOLTAGE CONVERSION see page 29 Table 2 1 Input Power Nominal Voltage Line Voltage Range M...

Page 28: ...Fuses Line Voltage Fuse Needed Agilent Part Number for X 1 in fuses only 100 120 V 8AM 2110 0342 220 240 V 4AM 2110 0055 Note All fuses are rated for 250 V Figure 2 3 Line Module Detail Artisan Techn...

Page 29: ...erly grounded three contact receptacle in accordance with the National Electrical Code local codes and ordinances The work should be done by a qualified electrician Line Voltage Conversion You can cha...

Page 30: ...logies An GP IB system can be connected together in any configuration star linear or both as long as the following rules are observed 1 The total number of devices including the computer is no more th...

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Page 32: ...procedures will help the first time user become familiar with operating the supply from the front panel When you have completed the checkout procedures you are then introduced to the fundamentals of...

Page 33: ...iators Indicate which output channel has been selected for front panel control and or display Only one output annunciator can be on at a time 3 7 3 8 6 1 6 4 4 Power Supply Status Annunciators CV Indi...

Page 34: ...B address You can change the address using the numeric entry keys You cannot query or change the address remotely over the GP IB 3 10 5 2 6 4 output selected ERR Displays a programming or hardware err...

Page 35: ...the Up Down keys to change the programming range 3 9 Up Down Keys These keys increment or decrement the voltage or current settings of the output selected The display will be in the metering mode for...

Page 36: ...d output voltage and current of the selected output are displayed 3 8 8 Numeric Entry Keys These keys are used in conjunction with many of the System Control and Output Control keys to enter the desir...

Page 37: ...ay will first show all segments of the LCD display with annunciators on as illustrated in Figure 3 2 Figure 3 2 Test Pattern of all Display Segments at Power on After all segments are displayed the su...

Page 38: ...igure 3 5 Sample Self Test Failure Display Checking Out Your Supply Using Local Control The following procedures use the display and keys on the front panel to check each of your power supply s output...

Page 39: ...A 4 Set the voltage to 20 V by pressing VSET 2 0 ENTER 5 Check that the display reads OVERVOLTAGE 6 Reset the supply by pressing VSET 1 6 ENTER RESET 7 Check that the display reads approximately 16 V...

Page 40: ...current in the front panel display 3 Press either the or the key voltage or current 4 Observe that the selected output s full scale programming range for voltage and current changes to the high range...

Page 41: ...Display The displayed response is the power supply s GP IB address When sending a remote command you append this address to the computer s GP IB interface select code normally 7 For example if the se...

Page 42: ...il it is read by the computer or is replaced with new information Note On an Agilent Series 200 300 Computer the A variable must be declared before you do the following steps Refer to your computer s...

Page 43: ...es that are within the range of any output that the power supply provides To set the voltage of output 1 to 5 volts send OUTPUT 705 VSET 1 5 To set the current of output 2 to 450 milliamps send OUTPUT...

Page 44: ...send OUTPUT 705 OCP 2 1 To disable the overcurrent protection mode for output 2 send OUTPUT 705 OCP 2 0 When overcurrent protection is disabled and the output is in CC mode the output current will be...

Page 45: ...Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Page 46: ...put combinations that are available on the power supply Each output can operate as a constant voltage CV or constant current CC source over a wide variety of output voltage and current combinations In...

Page 47: ...t 1 shows the operating locus defined by the voltage and current settings of each output The area in quadrant 2 indicates the locus where each output can operate as a current sink You cannot program c...

Page 48: ...within the High Voltage High Current range will cause the other parameter voltage or current to automatically be scaled down to the power limiting boundary see pages 71 and 73 The voltage and current...

Page 49: ...lts and minimal current on an output if any of the following conditions are present 1 The output voltage exceeds the programmed overvoltage trip point or 2 The sum of the voltage from the V output ter...

Page 50: ...locking tab to the left When the locking tab releases gently pull the terminal block cover away from the terminal block To reinstall the cover align it over the terminal block and gently press it int...

Page 51: ...in output terminals and not on the sense leads Thus the voltage sensed by the OVP circuit could be as much as 10 V higher than the voltage being regulated at the load Program the OVP trip voltage acco...

Page 52: ...l allow up to a total load lead drop of 10 V Because of the unavoidable voltage drop developed in the load leads the as shipped terminal block strapping pattern shown in Figure 4 4 does not provide th...

Page 53: ...connections on the rear panel terminal blocks Connect the unit for remote sensing by first disconnecting the straps between sense and load terminals Then make your connections as shown in Figure 4 5 C...

Page 54: ...at the load by noise induced in the leads or by load current transients acting on the inductance and resistance of the load lead If it is desirable to keep voltage transient levels to a minimum place...

Page 55: ...ervoltage circuit of one or more outputs by applying a 5 volt pulse of at least 50 s to any pair of OV terminals see Figure 4 8 As long as all OV terminals are wired together the outputs will be crowb...

Page 56: ...overvoltage shutdown Remember that each output has an overvoltage protection circuit that fires a crowbar to disable the output for any of the OVERVOLTAGE conditions described on page 48 Figure 4 10 i...

Page 57: ...tputs These outputs must have equivalent voltage and current capability For example on the Agilent 6626A power supply only outputs 1 and 2 or 3 and 4 may be connected together On the Agilent 6625A sup...

Page 58: ...ge setting of output 1 will determine the voltage that appears across the load The current limit point of the paralleled outputs is the sum of both individual current limit points The output current o...

Page 59: ...ge or ppm plus a constant For parallel operation the percentage portion remains unchanged while constant portions or any constants are changed as indicated below Current All parallel specifications re...

Page 60: ...forcing excessive current through it under certain load conditions Figure 4 13 shows an example of how to connect two outputs in series to a single load with local sensing This configuration applies...

Page 61: ...iode the output will have a reverse voltage across its output terminals with the V terminal more positive than the V terminal This voltage will be maximum at the rated current of the output See Figure...

Page 62: ...ty is achieved with this setup The outputs of the power supply can be programmed as voltage or current sources providing positive or negative voltages or currents By taking measurements via internal r...

Page 63: ...Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Page 64: ...you are not familiar with the operation of the power supply you are advised to read through Chapters 2 through 4 first GP IB Operation Interface Functions Remote control is implemented by the GP IB I...

Page 65: ...cate the state of their RQS bit but the operator should not assume that all instruments on the bus respond to parallel poll with their RQS bit Unless remotely configured the power supply will respond...

Page 66: ...tructure of a typical programming statement for an Agilent Series 200 300 computer If you are using a different computer or programming language refer to your computer programming manual to determine...

Page 67: ...4 See Table 5 4 C4 Query current of an output ISET 1 2 3 4 See Table 5 4 Q2 Increase or decrease output current by value ISTEP 1 2 3 4 See Table 5 4 C4 Select which output will be metered METER 1 4 C2...

Page 68: ...ape at the left of the syntax forms contains the command header which must be entered as shown in Tables 5 1 and 5 2 Commands are accepted in either uppercase or lowercase letters ASCII characters Cir...

Page 69: ...Remote Operation 68 Figure 5 2 Sheet 1 of 2 Syntax Forms For Power Supply Commands Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Page 70: ...Remote Operation 69 Figure 5 2 Sheet 2 of 2 Syntax Forms For Power Supply Commands Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Page 71: ...See Table 5 4 2 Current is SZD DDDDD 0 5 A SZD DDDDDD 15 mA SZD DDDD 2 A SZD DDDDD 0 2 A 3 Voltage can be SZD DDDD on 7 VR 4 X depends upon model 5 A space is returned for a sign 6 All responses are...

Page 72: ...ds which you will use to program the supply s voltage and current protection circuits and enhanced features like storage and recall registers and reprogramming delay When programming you should be awa...

Page 73: ...50 V 0 0 5 A 3 2 mV 33 A OUTPUT OUTPUTS Low 0 16 V 0 2 A 1 0 mV 13 A 2 3 4 High 0 50 V 0 2 A 1 2 6628A 1 2 3 4 6629A 3 2 mV 131 A The maximum programmable voltage values for each range are 1 higher th...

Page 74: ...talk ISET You can also instruct the supply to measure the actual output current at output channel 1 by sending the following query and address the supply to talk IOUT 1 The results are placed on the G...

Page 75: ...age exceeds the programmed overvoltage setting for a given output channel the OV is tripped The OV circuit will fire the SCR crowbar which shorts across the output and the output assumes a low impedan...

Page 76: ...age voltage range current current range and OV settings for all outputs and recalling them later you can have significant savings in programming time See Supplemental Characteristics in Table 1 2 Upon...

Page 77: ...of these registers Figure 5 3 Functional Relationship of Status Registers The supply has one serial poll register which services all outputs and provides the user with other power supply status relate...

Page 78: ...de the reading you will get when you query the register will be 9 To decode this we use Table 5 5 9 8 1 OV CV For example to query the astatus register of output 2 send the following query and address...

Page 79: ...e request may be generated see page 79 To read the fault register of output 2 and find out which bits are set send the following query and address the supply to talk FAULT 2 The power supply responds...

Page 80: ...ut that generated the request by checking which of the FAU bits are set in the case of a fault or checking to see if the error bit is set in the case of an error If the SRQ on faults was set then send...

Page 81: ...ddress the supply to talk The supply will respond with a 1 or 0 as discussed above Note The power on PON SRQ mode is stored in the non volatile memory of the supply so that although the supply may be...

Page 82: ...oad resistance and current limit setting See page 53 for output capacitor considerations To query the reprogramming delay setting of a particular output channel send the following query DLY 2 using ou...

Page 83: ...s test cannot be done from the front panel To instruct the power supply to carry out a self test send the following query and address the supply to talk TEST Calibration Mode Query To be able to calib...

Page 84: ...on is incorrect Follow the Syntax Diagram in Figure 5 2 Check spaces and delimiters NUMBER RANGE 5 An out of range number was sent Send a new number within the legal range NO QUERY 6 Computer addresse...

Page 85: ...on was attempted with the Calibration Jumper on the GP IB board in the lockout position Reposition jumper if desired See Service Manual SKIP SELF TST 22 The self test jumper on the GP IB board is in t...

Page 86: ...with a DSP command during remote operation see page 81 A change between the local and remote modes will not result in a change in the power supply s outputs Local Control Of Output Functions The Outpu...

Page 87: ...r ISET key must be pressed first The step keys can then be used to adjust the setting Press the ENTER key to change the actual setting 3 To use the step keys to change the voltage or current ranges fi...

Page 88: ...ogramming error See Table 5 4 The current step keys can also be used to change the current setting ISET CURR or CURR then ENTER The current can be set in the immediate execute mode This mode is in eff...

Page 89: ...ed output s overcurrent protection feature can be turned on and off from the front panel The OCP key toggles the selected output s overcurrent protection circuit on and off When it is on enabled the O...

Page 90: ...voltage and current settings of all outputs At power on each location contains zero volts and the minimum current limit see initial conditions on page 71 The STO and RCL keys allow you to store and re...

Page 91: ...Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Page 92: ...MM is connected to measure a current when a voltage measurement is anticipated by the program Note The memory used to store correction constants will accept and store data about 10 000 times which is...

Page 93: ...calibration mode line 300 The program is now ready to perform the calibrations on the power supply The program will first perform a subprogram called at line 360 and performed in lines 3420 3630 whic...

Page 94: ...ines 3670 3780 If an error has occurred a message will be sent to the output device CRT After all outputs are tested without errors the CAL MODE will be turned off and the calibration constants stored...

Page 95: ...Alignment Procedures 94 Figure A 3 Figure A 4 Figure A 5 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Page 96: ...n Supply CAL mode 310 320 IF Model Agilent6625A OR Model Agilent6628A THEN No_of_outputs 2 330 IF Model Agilent6626A OR Model Agilent6629A THEN No_of_outputs 4 340 350 FOR Chan 1 TO No_of_outputs Loop...

Page 97: ...to cal sink CC 730 Other_chan 3 Select current source channel 740 Cal_sink Irng_lo 1 Call program to cal low range sink 750 760 Chan 3 Select channel to cal sink CC 770 Other_chan 4 Select current so...

Page 98: ...3 1 OUT 4 1 1280 Turn on outputs 3 4 1290 SUBEND 1300 1310 1320 1330 SUB Output_off Subprogram to turn OFF outputs 1340 COM Ps Chan Other_chan Ps Mode1 7 1350 COM Outputs No_of_outputs 1360 OUTPUT Ps...

Page 99: ...1810 REPEAT Wait for supply to finish 1820 UNTIL BIT SPOLL Ps 4 Finished when Bit 4 goes true 1830 Vrlo FNDcv Read low output voltage 1840 1850 OUTPUT Ps VRHI Chan Set high readback voltage 1860 REPE...

Page 100: ...als 2320 PRINT 2330 PRINT The current shunt is NOT used 2340 END IF 2350 PRINT 2360 PRINT Press CONTINUE when ready 2370 PAUSE 2380 Output_on 2390 2400 Cal_i 2410 Clear_screen 2420 PRINT Calibrating t...

Page 101: ...structions 2820 2830 Output_off 2840 Clear_screen 2850 PRINT Set up output Chan for I_range A current SINK cal 2860 PRINT 2870 PRINT Connect outputs Chan and Other_chan together as in 2880 2890 IF I r...

Page 102: ...360 OUTPUT Ps NIDAT chan Ilo Ihi Send current sink data 3370 3380 SUBEND 3390 3400 3410 3420 Get_data SUB Get_data Subprogram with range data 3430 COM Specs Vrng_lo Vrng_hi Irng_lo Irng_hi 3440 COM Ps...

Page 103: ...or Err occurred Supply may not be calibrated 3750 PRINT The alignment program is stopped 3760 STOP 3770 END IF 3780 SUBEND 3790 3800 3810 3820 Cal_mode_off SUB Cal_mode_off Subprogram to turn off cal...

Page 104: ...a common block and changed by a single assign statement In the programming examples in this appendix the I O path name Ps is used for the power supply The ASSIGN statement that defines the I O path m...

Page 105: ...lowing program uses input statements to program the voltage and current settings of output 1 and output 2 10 ASSIGN Ps TO 705 20 INPUT ENTER A VOLTAGE FOR OUTPUT 1 V1 30 INPUT ENTER A CURRENT LIMIT FO...

Page 106: ...osition 0 of output 1 s status register to see if output 1 is in CV mode In this example the program references the function as a variable in a conditional execution statement Note that instead of pri...

Page 107: ...O pathname to the power supply LINE 20 Declares a common block for the I O pathname The COM statement must be used for the Ps variable to preserve its value for use in the service routine LINE 30 Retu...

Page 108: ...Y 0 LABEL ERROR CALL Err_trap 40 Lbl GOTO Lbl 50 END 60 70 80 SUB Err _ trap 90 OFF KEY 100 COM Ps Ps 110 OUTPUT Ps ERR 120 ENTER Ps Err 130 OUTPUT 2 USING K CHR 255 CHR 75 140 IF Err THEN 150 PRINT P...

Page 109: ...is received The following example uses stored operating states to set up an output Using this method of setting up outputs saves processing time and facilitates repeating the same commands 10 ASSIGN P...

Page 110: ...ands may also be executed locally from the supply s front panel marked by single asterisks in Table C 1 Several commands will generate a response which will be indicated on the front panel of the supp...

Page 111: ...ch TEST UNMASK ch sum of bit weights UNMASK ch VOUT ch VRSET ch x VRSET ch VSET ch voltage setting VSET ch VSTEP ch step vaiue Calibration Commands IDATA ch llo ihi IHI ch ILO ch IRDAT ch Ilo Ihi IRHI...

Page 112: ...ing delay of the specified output ch see page 81 The response can be a real number from 0 000 to 32 seconds e g 0 450 seconds DSP on off Turns the power supply s front panel display either on or off s...

Page 113: ...utput ch see Appendix A IRHN ch Finds the maximum current readback value for the specified output ch see Appendix A IRSET ch x Sets the full scale current range programming for an output ch The power...

Page 114: ...BLED when the selected output channel is turned off OVCAL ch Causes the specified output ch to go through the overvoltage calibration routine see Appendix A OVRST ch Attempts to reset the overvoltage...

Page 115: ...ch The response integer 0 255 represents the sum of the binary weights of the status register bits see page 76 TEST Causes the power supply to perform a self test of its GP IB interface The response...

Page 116: ...ill select the lowest operating range that will contain the value x If the present operating voltage of the supply is greater than the full scale range selected the present output voltage will be redu...

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Page 118: ...query The applicable error message is displayed on the supply s front panel when the ERR key is pressed Sending the ERR or pressing the ERR key clears the error Test Responses Table D 3 describes the...

Page 119: ...occurred on an unknown output Service is required Refer to the Troubleshooting Section in the Service Manual 11 HDW ERR CH 1 Error codes 11 through 14 refer to a specific output where an output error...

Page 120: ...EST Response Response Code TEST query Explanation 0 No errors were detected 20 The timer on the GP IB board failed self test Refer to the Troubleshooting Section in the Service Manual 21 The RAM on th...

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Page 122: ...ne module in the direction of the ac input socket 3 Remove the voltage selector card from its receptacle This card is about one inch square and has a red notch in each of its four edges 4 To select a...

Page 123: ...da Agilent Technologies Canada Inc 5150 Spectrum Way Mississauga Ontario L4W 5G1 tel 1 877 894 4414 Australia New Zealand Agilent Technologies Australia Pty Ltd 347 Burwood Highway Forest Hill Victori...

Page 124: ...vision indicated on the title page 2 01 00 All references to HP have been changed to Agilent All references to HP IB have been changed to GPIB 9 20 04 The Declaration of Conformity has been updated Ar...

Page 125: ...uipment Have surplus equipment taking up shelf space We ll give it a new home Learn more Visit us at artisantg com for more info on price quotes drivers technical specifications manuals and documentat...

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