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E3630A Operating Manual

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1. 5 1 x Senone rosten E 1 feoovsmnomne ros 5 s x E36304000 j j E e ee E E j x E363020001 e E CI 0180406 1 CAP FXD 100000 25V 20 i CAP FxXD 1000UF 20 Zev A C csar 01804085 CAPFXD 3300F 35v 20 ALeuecTIT z E a C5 6 7 0180 3769 CAP TA 6 8UF 35V 28480 C8 17 22 0160 7449 CAP FXD 0 33UF 10 50V POLYP MET 28480 Table A 12 Replaceable Parts List Cont d DESIGNATION NUMBER TUF r 20 E 0160482 i 1000eF 10 Sov RxR erze 2 470opr 200 2 22 CAP FXD 100PF 100v GeR 20 01607548 2 _ CAPFxD 2200PF 10 sovceR 1803990 CAP FXD4700UF 20 RESISTOR swewiTo or20 aeaeo RESISTOR 178 1 SWPWNTC 0 90 2880 a Joatr saao_ 1__ RESISTORO 2 1 BWWNTO 0 00 aeaeo G 1 RESISTOR 10K 5 aWPwITC
2. PREREGULATOR CONTROL CIRCUIT DRIVER OR GATE CV ERROR AMP Figure 1 Block Diagram PRINCIPLES OF OPERATION Block Diagram Overview This section presents the principles of operation of the E3630A Triple Output Power Supply Throughout this discus sion refer to both the block diagram of Figure A 1 and the schematic diagrams at the rear of the manual The two primary windings of the power transformer are con nected in one of three different ways by setting the two slide switches mounted on the circuit board These switches select one of the nominal ac input voltages for which the supply is designed 100 V 115 V or 230 V The transformer secondaries together with rectifiers and capacitor filters provide raw dc for the three output regulator circuits and for another regulator that provides reference and bias voltages to the output regulators A 1 By comparing its output to a high stability reference the 0 to 6 volt regulator holds its output voltage at the value deter mined by a front panel control Any error in the actual output as compared to the desired output is amplified by an opera tional amplifier and applied as feedback to control the con duction of a series regulator trans
3. 1 7 Connecting Load ee Sh ed 1 8 Parallel Operations 7 uu a eS eld wie ae 1 8 or ash eek Se eh ee aan at 1 8 LOAD 5 1 SA ee eee ee ea ed 1 8 PU SETOAIN C u 1 8 REVERSE CURRENT LOADING ru uu naar 1 8 OUWTPUAICAPAGCITANGE tea tatu A 1 8 REVERSE VOLTAGE PROTECTION 1 8 1 3 GENERAL INFORMATION INTRODUCTION This section contains general information concerning the E3630A triple output power supply Included are safety con siderations safety and EMC requirements instrument and manual identification option and accessory information instrument description and specifications SAFETY CONSIDERATIONS This product is a Safety Class instrument which means that it is provided with a protective earth ground terminal This ter minal must be connected to an ac source that has a 3 wire ground receptacle Review the instrument rear panel and this manual for safety markings and instructions before operating the instrument Refer to the Safety Summary page at the beginning of this manual for a summary of general safety information Specific safety information is located at the appropriate places in this manual
4. 2 RESISTOR 316 11 125W TF TC 201 100 20 0698008 t RESISTOR 218K 1 125WTC 0 T00 oose 2715 1 RESISTOR FUSE TORM 5 05W070 Raa 5o63 06888625 3 RESISTOR 1 69K 0 1 125W TF 1C 0 100 28480 m t RESISTOR 825K 128W TF C201 100 28480 0757040 1 RESISTOR 750 1 125w TF TO 0 100 oe988824 2 RESISTOR 662K 11 125W TF TC201100 28480 Rss77 06983518 2 RESISTOR 732K 11 125W TF TO 0 100 28480 Table A 12 Replaceable Parts List Cont d DESIGNATION NUMBER ma 08983136 RESISTOR 178K 19 125WTFTO O 100 249 55 56182 07570403 a RESISTOR 121 1 125WTFTO 0r100 28480 m fossas 1 RESISTOR 176K 125WTC 0 100 15852 08986323 2 RESISTOR 100 01 125W TE TC 0 100 280 RO 08984525 t RESISTOR 187K 1 2840 R61 21903531 1 RESISTOR TRMR 250 10 TKF TOP ADJ 1 TRN Fa RESISTOn 332K 1 126WTFTC 0 100 OO F 07570407 __ RESISTOR 100 1 126WTFTC 0 100 esaeo O R66 68 70 0698 6362 3 RESISTOR 1K 0 1 126WTFTC 0 100 280 676971 0698 6358 3 RESISTOR 100K 0 1 125W TF TC 0 100 28480 2 osit2ie8_ 2__ RESISTORSK 5 WPWiTC 0 20 FO oeesozs2 1 RESISTOR 261K 1 125W TF TC 01100 28
5. Troubleshooting paragraph If not blown check bias and reference voltages Table A 4 Output voltage lower or Check bias and reference voltages Table 4 higher than rating Check output voltage of 20V a Normal 1 20 and 20V outputs are both normal with no load a supply in fixed tracking ratio supply might be current limiting under load To check this mode adjustment see steps 1 thru p on page 4 b High low or zero out b Proceed to 20V supply troubleshooting put voltage Check output of 6V supply a Normal a Ifthe output of this supply is normal unloaded but its volt age falls when loaded check the current limit adjust ment steps q thru t on page A 4 b High low or zero out b Proceed to Table A 7 put voltage Table A 4 Bias and Reference Voltage Check STEP ACTION RESPONSE NEXT ACTION Check 12V bias a Normal 12V 5 a Proceed to step 3 b Voltage high b Check U3 for short c Output voltage lower or Check for open higher than rating Note A short within U2 U6 U8 U9 or U14 can cause low 12V or 12V bias voltages Check 5V reference a Normal 5V 2 a Proceed to step 3 b Voltage high b Check U5 for open c Voltage low c Check U5 and Q2 for short Check 12V bias a Normal 12V 5 a Proceed to 20V supply troubleshooting Table A 5 b Check U1 for short b High voltage c Check U1 for open c Low voltage T
6. could result in damage to or destruction of part or all of the product Do not proceed beyond CAUTION sign until the indicated condi tions are fully understood and met CAUTION The NOTE sign denotes important infor mation It calls attention to a procedure practice condition or the like which is essential to highlight DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT Because of the danger of introducing additional hazards do not install substitute parts or perform any unauthorized modi fication to the instrument Return the instrument to a Agilent Technologies Sales and Service Office for service and repair to ensure that safety features are maintained Instruments that appear damaged or defective should be made inoperative and secured against unintended operation until they can be repaired by qualified service personnel 1 2 Table of Contents SAFETY SUMMARY Sa te eevee celal Amt sacl a Qi m s q ety nem ean 1 2 GENERAL INFORMATION 2 220 a hoa Saeed 1 4 INTRODUCTION lp y ie eee ten ee ee eG AES AS SM eee eS 1 4 SAFETY CONSIDERATIONS ghd qua nets Se adn wed gee te eee ee Es y he 1 4 SAFETY AND EMC REQUIREMENTS 1 4 INSTRUMENT AND MANUAL IDENTIFICATION 000 0200000 e 1 4 OPTIONS ea OR SOA we hee eta eS 1 4 ACCESSORY ec uate gya shuku
7. when a decreasing load resistance increases it to 2 75 5 Meter Calibration Panel Voltmeters To calibrate voltmeter proceed as follows a Connect DVM across 20V output terminal and COM ter minal of the supply b Turn the supply Set the output voltage below 18V ex 15V and adjust R11 on the display board until front panel VOLTS display reads exactly DVM value Next set the output voltage above 20V ex 21V and adjust R17 on the display board until front panel VOLTS display reads exactly DVM value NOTE No other voltage output needs to be calibrated after calibrating the voltmeter of 20V output Panel Ammeter To calibrate ammeter for 20V output and 20V output proceed as follows a Connect Rg between 20V output terminal and COM ter minal and connect DVM across Rg Push 20V meter switch and turn 20 VOLTAGE control fully clockwise Turn on the supply and adjust R5 on the display board until front panel AMPS display reads exactly DVM value divided by Rs To calibrate the ammeter for 6V output select 6V meter switch and turn 6V VOLTAGE control fully clock wise Adjust R61 on the main board until front panel AMPS dis play reads exactly DVM value divided by Rs REPLACEABLE PARTS INTRODUCTION This section contains information for ordering replacement parts Table A 12 lists parts by reference designators and pro vides the following information Reference designators Refer t
8. 115 Vac 1 6A 2110 0918 230 Vac 1 0A 2110 0599 SPECIFICATIONS Table 1 lists detailed specifications for the power supply Specifications 1 5 OPERATING TEMPERATURE RANGE 0 to 40 C for full rated output At higher temperatures out put current is derated linearly to 50 at 55 C maximum temperature TEMPERATURE COEFFICIENT All Outputs Less than 0 02 plus 1 mV voltage change per C over the operating range from 0 to 40 C after 30 minutes warm up STABILITY OUTPUT DRIFT All Outputs Less than 0 1 plus 5 mV to 20 Hz dur ing 8 hours at constant line load and ambient after an initial warm up time of 30 minutes LOAD TRANSIENT RESPONSE TIME All Outputs Less than 50 usec for output recovery to within 15 mV of nominal output voltage following a load change from full load to half load or vice versa OUTPUT VOLTAGE OVERSHOOT All Outputs During turn on or turn off of ac power output plus overshoot will not exceed 1 V if the out put control is set for less than 1 V If the con trol is set for 1 V or higher there is no overshoot METER ACCURACY 0 5 of output 2 counts at 25 C 5 C METER RESOLUTION All Output Voltage DIMENSIONS 212 3 mmW x 88 1 mmH x 269 2 mmD 8 354 inW x 3 469 inH x 10 591 inD 10mV Current 10mA WEIGHT 3 8 kg 8 4 lbs net 5 1 kg 11 3 lbs shipping INSTALLATION INITIAL INSPECTION Before shipment this instrument was inspected and found to be free of mechanical an
9. Manufacturing Site Agilent Technologies Inc Agilent Technologies Malaysia Sdn Bhd 550 Clark Drive Suite 101 Malaysia Manufacturing Budd Lake New Jersey 07828 Bayan Lepas Free Industrial Zone PH III USA 11900 Penang Malaysia Declares under sole responsibility that the product as originally delivered Product Name a Single Output dc Power Supply dual range b Single Output dc Power Supply single range c Single Output System Power Supply d Multiple Output dc Power Supply e Multiple Output System dc Power Supply Model Number a E3610A E3611A E3612A b E3614A E3615A E3616A E3617A c E3632A d E3620A E3630A e E3631A Product Options This declaration covers all options of the above product s Complies 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 Class A Emissions As detailed in Electromagnetic Compatibility EMC Certificate of Conformance Number CC TCF 00 102 based on Technical Construction File TCF ANJ12 dated Dec 20 2000 Assessed by Celestica Ltd Appointed Competent Body Westfields House West Avenue Kidsgrove Stoke on Trent Straffordshire ST7 1TL United Kingdom Safety Information and Conforms to the following safety standards 61010 1 2001 EN 61010 1 2001 CSA 22 2 No 1010 1 1992 This DoC applies to above listed products placed on t
10. applying power to the supply make certain that its line voltage selector switch S2 is set for the line voltage to be used Initial Troubleshooting Procedure If a malfunction is found follow the steps below a Disconnect input power from the supply and remove all loads from the output b Table A 2 lists the symptoms and probable causes of sev eral possible troubles If the symptoms is one of those listed make the recommended checks If none of the symptoms of Table 2 apply proceed to Table A 3 This table provides an initial troubleshooting procedure that also directs you to the more detailed pro cedures which follow it The numbered test points referred to in the troubleshooting procedures are identified on the circuit schematic at the rear of the manual Open Fuse Troubleshooting Although transients or fatigue can cause a fuse to blow it is a good idea to inspect the unit for obvious shorts such as dam aged wiring charred components or extraneous metal parts or wire clippings in contact with circuit board conductors before replacing the fuse The rating of the correct replace ment fuse depends on the line voltage option of the instru ment for Option OE3 use a slow blow 1 0 amp fuse and standard and Option OE9 use slow blow 1 6 amp fuse Table A 2 Miscellaneous Troubles SYMPTOM CHECK PROBABLE CAUSE High ripple thru r on page A 5 Check operating setup for ground loops Check m
11. f Adjust the oscilloscope to display transients as in Figure A 8 g Check that the pulse width t t of the transients at 15 mV from the base line is no more than 50 usec as shown h Repeat for the remaining supply outputs 175 39 25 60us Figure A 8 Load Transient Response Time Waveform A 6 Stability Drift Definition The change in output voltage dc to 20 Hz for the first 8 hours following a 30 minute warm up period with con stant input line voltage constant load resistance and constant ambient temperature To measure the stability a Connect the test equipment across the output of the 20V supply as shown in Figure A 6 b Operate the electronic load in constant current mode and set its current to the full rated value of power supply Turn the supply d Turn up output voltage to the full rated value as read on the digital voltmeter e After a 30 minute warm up note the voltage on DVM f The output voltage reading should deviate less than 0 1 plus 5 mV from the reading obtained in step over a period of 8 hours g Repeat for the remaining supply outputs TROUBLESHOOTING Before attempting to troubleshoot the power supply ensure that the fault is with the supply and not with an associated piece of equipment You can determine this without removing the covers from the power supply by using the appropriate portions of the Performance Test paragraph CAUTION Before
12. reference and bias voltages for the output regulators The display power circuit provides voltage which is used by the A D converter and display The turn on turn off control circuit prevents output transients when the supply is turned on or off It does this by delaying the application of certain bias and reference voltages at turn on and removing them shortly after turn off Three meter push button switches select which of the sup plies has its output voltage and current indicated on the front panel meters Diode CR2 CR3 and CR4 are connected across the output terminals in reverse polarity They protect the output elec trolytic capacitor and the series regulator transistors from a reverse voltage applied across the output terminals MAINTENANCE INTRODUCTION This section provides performance test troubleshooting infor mation and adjustment and calibration procedures The fol lowing operation verification tests comprise a short procedure to verify that the power supply is performing properly without testing all specified parameters If a fault is detected in the power supply while making the performance check or during normal operation proceed to the troubleshooting procedures After troubleshooting per form any necessary adjustments and calibrations Before returning the power supply to normal operation repeat the performance check to ensure that the fault has been properly corrected and that no other faults exist Tes
13. the front panel voltmeter similarly by connecting the DVM to each of these outputs in turn setting the 20V VOLTAGE control for a 20 volts DVM indication and verifying that the panel meter is accurate within 0 5 2 counts 19 7V to 20 3 Tracking d Connect the DVM to the 20V output set the 20V VOLTAGE control for a DVM indication of 20 volts and reconnect the DVM to the 20V output without disturbing the voltage control The voltage at the 20V output should be within 1 of the 20V output 19 8V to 20 2V Variable Tracking Ratio e Leave the 20V VOLTAGE control set as in step d and use a DVM to monitor the voltage of the 20V supply while adjusting the TRACKING RATIO control over its VARIABLE range The 20V supply should be capable of being adjusted from less than 0 5 volts to between 19 to 21 volts Return the TRACKING RATIO control to the FIXED position NOTE Leave the TRACKING RATIO control in the FIXED position throughout the reminder of the performance test Rated Output and Ammeter Accuracy f Connect two 40Q 20 W load resistors across both of the 20V outputs of the supply and set the 20V VOLTAGE control for 20V outputs All supplies must be fully loaded while checking the rated output voltage and cur rent of each supply g Connect the test setup shown Figure A 5 to the 6V output Make the total resistance of and the current sampling resistor equal to 2 4Q to permit operati
14. to be at least 20 watts Electronic Load Some of the performance test procedures use an electronic load to test the supply quickly and accu rately An electronic load is considerably easier to use than a load resistor It eliminates the need for connecting resistors or rheostats in parallel to handle the power it is much more sta ble than a carbon pile load It is easier to switch between load conditions as required for the load regulation and load tran sient response tests Output Current Measurement For accurate output current measurements a current sampling resistor should be inserted between the load and the output of the supply To simplify grounding problems one end of this sampling resistor should be connected to the same output terminal of the supply which will be shorted to ground An accurate voltmeter is then placed across the sampling resistor and the output current calculated by dividing the voltage across the sampling resistor by its ohmic value The total resistance of the series combination should be equal to the full load resistance as determined in the preceding paragraphs Of course if the value of the sampling resistor is very low when compared to the full load resistance the value of the sampling resistor may be ignored The meter shunt recom mended in Table A 1 for example has a resistance of only 100 mQ and can be neglected when calculating the load resistance of the supply Figure A 4 shows a four terminal mete
15. workmanship for a period of 90 days from date of delivery During the warranty period either Agilent or Agilent Technologies will at its option either repair or replace products which prove to be defective Agilent does not warrant that operation the software firmware or hardware shall be uninterrupted or error free For warranty service with the exception of warranty options this product must be returned to a service facility designated by Agilent Return to Englewood Colorado Service Center for repair in United States 1 800 258 5165 Customer shall prepay shipping charges by and shall pay all duty and taxes for products returned to Agilent for warranty service Except for the products returned to Customer from another country Agilent shall pay for return of products to Customer 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 or Geneva Export price If Agilent is unable within a reasonable time to repair or replace any product to condition as warranted the Customer shall be entitled to a refund of the purchase price upon return of the product to Agilent The warranty period begins on the date of delivery or on the date of installation if installed by Agilent LIMITATION OF WARRANTY The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance
16. 1B FUS R R60 187K R63 1 69k 0 11 V i2 R64 332K 6 R6S gt 500 100 U7 VR 7805 10 50 LM7912 Be 6V 13 739A R67 100 0 1 2N2222A 20V R69 122k 0 17 2 2222 R20 3 83k 20V R71 102k 0 17 NC NC NC NC NC NC 11 14 17 J1 7 V J1 9 J1 6 i To Disp gt 5Vd J1 1 Disp_ SV J1 2 Disp_GND P 12V J1 8 gt gt 5 gt Va gt gt 12 J1 10 Agilent Technologies 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 measurements are traceable to the United States National Institute of Stan dards and Technology formerly National Bureau of Standards to the extent allowed by that organization s calibration facility and to the calibration facilities of other International Standards Organization members WARRANTY This Agilent Technologies hardware product is warranted against defects in material and workmanship for a period of three years from date of delivery Agilent software and firmware products which are designated by Agilent for use with a hardware product and when properly installed on that hardware product are warranted not to fail to execute their programming instruc tions due to defects in material and
17. 20 8767 POWER CORD FOR STD 8120 8768 POWER CORD FOR OE3 E3630 60001 MAIN BODY ASSY STD OE9 3630 60005 BODY ASSY OE3 3 CODE MER P N 28480 28480 28480 28480 28480 28480 28480 28480 28480 28480 28480 28480 0371 3806 KEY CAP WHT E3630 40007 3 KEY CAP GRAY 5041 8626 5041 8627 REAR CAP TOP COVER INSULATOR TRANSISTOR MICA TO 3 INSULATOR BUSHING 0340 0140 0340 0168 4 Pp y el Pp e C Pp fp 3 pam 5018628 1 BOTTOM COVER Oooo y 5 ca _ E3630 60007 _ ees 1 1 HEATSINK ASSY 3630 80003 1 INSULATOR MULTIPLES TO 218 INSULATOR FLG BSHG RYTON R4 28480 28480 28480 28480 28480 28480 28480 28480 28480 E3630 00001 HEATSINK BRACKET HEAT SINK ASSY STD OE9 115V 100V HEAT SINK ASSY OE3 230V 2110 0918 1 FUSE 1 6A 250V STD OE9 2110 0599 1 FUSE 1A 250V NTD OE3 o E3630 60006 E3630 60003 1252 4214 AC INLET SOCKET 5022 1631 HEATSINK DIECASTING E3630 60004 FRONT PANEL ASSY E3630 60009 DISPLAY BOARD ASSY 28480 EB630 40004 1 FRONT FRAME 28480 R11 36 2100 4299 RES VAR 10K 5 1 TURN WW 32997 3590S A17 103 2100 4319 3 RES VAR 10K 5 WITH SWITCH 32997 99A2DC28 H15 R50 x pio posta j Jj
18. 480 Fa 2100684 2 resstonros omm eee s 825021 ICV RGLTR FXD NEG T1 5 12 5V T0220 O 825047 ICV RGLTR FXD POS 11 5 12 5V TO 220 0471S O 8260144 i ICV RGLTR FXD POS 4 875 2V TO 220 PKG _ 7 O i IC COMPARATOR GP QUAD T4PINDIPP arora Ua 8260412 i IC COMPARATOR DUAL 8 PIN DPP 27014 em 1906025 DIODE FW BRDG soovea h se 982066 3 5 23 24 29 1901 1149 az DIODE PWR RECT 400V 1A 50NS DO 41 14936 UF4004 30 33 34 CR2 0 1901 1081 1 DIODE PWR 100V 04713 1N5401 CR6 7 8 9 10 11 12 1901 0033 15 DIODE GEN PRP 180V 2A 28480 13 14 15 18 19 20 21 22 an 1853 0387 1 TRANSISTOR PNP DARL TOS PO T6OW oari 5 02 6 1854 0477 2 TRANSISTOR NPN 2 2222 SI 18 PD 500 04713 2N2222A MW Q3 10 11 1853 0281 TRANSISTOR PNP 2N2907A SI TO 18 PD 400 04713 2N2907A MW 04 5 1854 0039 TRANSISTOR NPN 2 3053 SI 39 PD 1W 04713 2N3053S 1853 0590 TRANSISTOR PNP 2N4036 SI TO 5 PD 1W 04713 2N4036 1853 0709 TRANSISTOR PNP SI TO 218AC PD 125W 04713 TIP36C L1 2 3 9170 0894 CORE SHIELDING BEAD 28480 9100 5248 1 gt XFMR PWR 100 115 230V IEC 348 amp 1010 28480 FP 1854 1233 1 TRANSISTOR NPN SI TO 218AC PD 125W 04713 TIP35C 4 1 Table A 12 Replaceable Parts List Cont d REFERENCE PART Q TY DESCRIPTION MFR CODE MER
19. P N DESIGNATION NUMBER 1252 4159 CONNECTOR POST TYPE 2 5 PIN SPCG 11 CONT 28480 l ail 1251 4381 CONNECTOR POST TYPE 2 5 PIN SPCG 7 CONT 28480 FP 3101 1730 1 SWITCH PB MOM 5A 250VAC 3PCS 28480 3101 2985 1 SWITCH PB DPSTALTNG 4 250VAC 28480 FP lt lt 3101 1914 1 SWITCH SL 2 DPDT STD 1 5 250VAC 28480 SW POWER 1 1 6 250 J1 PLUG AC FEMALE LINE SELECTOR SW GBPC6g6 L AC1 TRANSF ORMER 17 CR32 T MCR264 4 5Vd MCR264 4 ax MCR264 4 gt 010 2 2907 LM393N MCP 30207 CR2S KBPC606 2501 5V O R79 7 5k U13 MCP 3020Z R74 10k d LM393N 4 R77 R80 7 3265 2 61k 12V V CR31 CR23 CR27 UFuggu C29 10090 Sav 5 R24 475 239036 1 9 09 TIP36C CR24 UF 4 H 0 135901 6V J2 1 gt R11 POT tise J2 2 gt J1 4 COVL 6V J1 3 COVL 28 gt 41 5 91 11 5V 12 COVL 20 12V 20V CR3 UF4oo4 1 i CCC VV Ruu 1 69k 0 1 RUS 8 25 0 1 R15 25k 1 CR2 UFug0u S W o FIXED O O VARIABLE lt R41 POT CW R14 25k 0 12 lt T 28 5V R57 178K q R59 R58 1 69K 100 0 17 0 17 V i3 T
20. SAFETY AND EMC REQUIREMENTS This power supply is designed to comply with the following safety and EMC Electromagnetic Compatibility requirements m IEC 1010 1 1990 EN 61010 1993 Safety Require ments for Electrical Equipment for Measurement Control and Laboratory Use m CSA 22 2 No 231 Safety Requirements for Electrical and Electronic Measuring and Test Equipment UL 1244 Electrical and Electronic Measuring and Testing Equipment m EMC Directive 89 336 EEC Council Directive entitled Approximation of the Laws of the Member States relating to Electromagnetic Compatibility m 55011 1991 Group 1 Class B CISPR 11 1990 Lim its and Methods of Radio Interference Characteristics of Industrial Scientific and Medical ISM Radio Fre quency Equipment m EN 50082 1 1992 IEC 801 2 1991 Electrostatic Discharge Requireents IEC 801 3 1984 Radiated Electromagnetic Field Requirements IEC 801 4 1988 Electrical Fast Transient Burst Requirements m ICES NMB 001 This ISM device complies with Canadian ICES 001 Cet appareil ISM est conforme a la norme NMB 001 du Canada INSTRUMENT AND MANUAL IDENTIFICATION A serial number identifies your power supply The serial num ber encodes the country of manufacture the week of the lat est significant design change and a unique sequential number The letter KR designates Korea as the country of manufacture the first one digit indicates the year 3 1993 4 1994 and so forth and the seco
21. able A 5 20V Supply Troubleshooting SYMPTOM STEP ACTION RESPONSE PROBABLE CAUSE High output voltage 1 Attempt to turn Q9 by a Output voltage remains high Q9 shorted higher than rating shorting emitter to base b Output voltage becomes near zero Remove short and proceed to step of Q9 volt 2 2 Measure voltage at a Measured voltage is less than 0 Check for open CR13 or R36 and base of Q5 volt check for defective U6A b Measured voltage is more than 0 Check for defective Q5 volt A 8 Table 5 20V Supply Troubleshooting Cont d Low output voltage lower than rating Measure voltage at the base of Q5 Eliminate current limit circuit as a source of trouble by disconnecting anode of CR11 Measure voltage at pin 3 of U6 Measured voltage is less than 0 volt Measures voltage is more than 0 volt Output voltage increases Output voltage remains low Measured voltage is near 0 7V Measured voltage is zero volt Measured voltage is near 0 7V 5 Check for open Q9 Q6 R26 CR5 Proceed to step 2 Check for U6B defective Reconnect lead and proceed to step 3 Check for defective U6A Check for CR14 or CR15 shorted Check for open R39 shorted R36 or leaky or shorted C7 Table A 6 20V Supply Troubleshooting SYMPTOM STEP ACTION RESPONSE PROBABLE CAUSE The 20V supply must operate properly be
22. ain rectifiers CR1 CR25 CR26 for open c Supply may be operating in current limit mode Check current limit adjustment steps k Will not current limit U2 U6 U8 Check for open OR gate diodes CR7 CR11 CR18 or defective current limit amplifier Poor load and line regulation a Check bias and reference voltages Table A 4 b Check main rectifiers and filters for opens Oscillation or poor transient a High frequency oscillations above 50 kHz can be caused by an open C11 C20 or C25 response time b defective output capacitor C2 or C4 can cause oscillations in one of many frequency ranges c Oscillation only in the current limiting mode can be caused by an open C12 C19 or C24 Transient voltage overshoot at Overshoot only the 20V supply can be caused by a shorted Q3 turn on or turn off b Overshoot in all three supply outputs can be caused by an open Q2 or a shorted Q6 Excessive heat a Check preregulator control circuit Refer to Table A 8 and Table A 9 b Check CR27 CR28 CR31 CR32 for short Output Voltage clamped above 10V for 20V output Check preregulator control circuit Refer to Table A 8 and Table A 9 A 7 Table A 3 Initial Trobleshooting Procedure STEP ACTION RESPONSE NEXT ACTION Check output voltage of 20V a Normal a Proceed to step 2 supply b Zero volts b Check ac line fuse F1 If blown proceed to Open Fuse
23. ained in the upper end of the input voltage range however the supply probably will operate within its specifications Connecting Load Each load should be connected to the power supply output terminals using separate pairs of connecting wires This will minimize mutual coupling effects between loads and takes full advantage of the low output impedance of the supply Load wires must be of adequately heavy gauge to maintain satis factory regulation at the load Each pair of connecting wires should be as short as possible and twisted or shielded to reduce noise pick up If a shield is used connect one end to the supply ground terminal and leave the other end unconnected If load considerations require locating output power distribu tion terminals at a distance from the power supply then the power supply output terminals should be connected to the remote distribution terminals by a pair of twisted or shielded wires and each load should be connected to the remote distri bution terminals separately Parallel Operation Two or more supplies can be connected in parallel to obtain a total output current greater than that available from one sup ply The total output current is the sum of the output currents of the individual supplies The output voltage controls of one power supply should be set to the desired output voltage and the other supply set for a slightly larger output voltage The supply set to the lower output voltage will act as a
24. an insulated test lead The ammeter should indicate a short circuit output current of 0 55 A 5 Remove the short from the output terminals f Repeat steps d and e for 20 V output g Adjust the 20V output to 20 volts Then push 20V METER switch and check the effect of the Tracking Ratio control on the voltage of the 20V output The 20V output should be adjustable from less than 0 5 volts to a maximum of 19 to 21 volts If this brief checkout procedure or later use of the supply reveals a possible malfunction see the service information section for detailed test troubleshooting and adjustment pro cedures OPERATION This power supply can be operated individually or in parallel or series with another supply see Parallel and Series Opera tion paragraphs All output terminals are isolated from ground The 20V and 6V outputs use a single common out put terminal This common COM terminal or any one of the other output terminals may be grounded to the chassis at the front panel ground terminal in Figure 2 or all outputs may be left floating Loads can be connected separately between each of the 0 to 20V output terminals and the COM terminal or between the 20V and the 20V terminals for a 0 to 40V output Each output voltage or current can be quickly selected for monitoring with the push button meter switches To moni 1 7 tor the 0 to 40V output voltage add the voltmeter readings of the 20V and 20V output
25. and use either the 20V or the 20V meter to measure the current Tracking Ratio Control With the Tracking Ratio control in the Fixed position the volt age of the 20V supply tracks that of the 20V supply within 1 for convenience in varying the symmetrical voltages needed by operational amplifiers and other circuits using bal anced positive and negative inputs Turn the Tracking Ratio control counter clockwise out of the Fixed position to set the voltage of the 20V supply lower than that of the 20V supply The negative supply can be set from a minimum of less than 0 5 volts to a maximum within 5 of the 20V supply s output Once this is done the 20V voltage control still controls both outputs and maintains a constant ratio between their voltages Overload Protection Circuits 20 Volt Current Limit The 20V and 20V outputs are indi vidually protected against overload or short circuit damage by separate current limit circuits to limit the output current to 0 55 5 This is 110 of the maximum rated output If a sin gle load is connected between the 20V and 20V outputs the circuit set for the lesser current limit will limit the output No deterioration of supply performance occurs if the output current remains below the current limit setting 6V Current Foldback The overload and short circuit pro tection circuit for the 6V output reduces the output current limit as the output terminal voltage decreases The opera
26. by the Customer Cus tomer supplied software or interfacing unauthorized modification or misuse operation outside of the environmental specifica tions for the product or improper site preparation and maintenance TO THE EXTENT ALLOWED BY LOCAL LAW NO OTHER WARRANTY IS EXPRESSED OR IMPLIED AND AGILENT SPECIFICALLY DISCLAIMS THE IMPLIED WARRAN TIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE For consumer transactions in Australia and New Zealand The warranty terms contained in this statement except to the extent lawfully permitted do not exclude restrict or modify and are in addition to the mandatory rights applicable to the sale of this product to you EXCLUSIVE REMEDIES TO THE EXTENT ALLOWED BY LOCAL LAW THE REMEDIES PROVIDED HEREIN ARE THE CUSTOMER S SOLE AND EXCLUSIVE REMEDIES AGILENT SHALL NOT BE LIABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES WHETHER BASED ON CONTRACT TORT OR ANY OTHER LEGAL THEORY ASSISTANCE The above statements apply only to the standard product warranty Warranty options extended support contacts product maintenance agreements and customer assistance agreements are also available Contact your nearest Agilent Technolo gies Sales and Service office for further information on Agilent s full line of Support Programs DECLARATION OF CONFORMITY According to ISO IEC Guide 22 and CEN CENELEC EN 45014 Manufacturer s Name and Addresss Responsible Party Alternate
27. constant voltage source while the supply set to the higher output will act as a current limited source dropping its output voltage until it equals that of the other supply The constant voltage source will deliver only that fraction of its rated output current 1 8 necessary to fulfill the total current demand Series Operation Series operation of two or more power supplies can be accomplished up to the output isolation rating of any one sup ply to obtain a higher voltage than that available from a single supply Series connected supplies can be operated with one load across both supplies or with a separate load for each supply The power supply has a reverse polarity diode con nected across the output terminals so that if operated in series with other supplies damage will not occur if the load is short circuited or if one supply is turned on separately from its series partners When this connection is used the output volt age is the sum of the voltages of the individual supplies Each of the individual supplies must be adjusted in order to obtain the total output voltage LOAD CONSIDERATIONS This section provides information on operating your supply with various types of loads connected to its output PULSE LOADING The power supply will automatically cross over from constant voltage to current limit operation in response to an increase in the output current over the preset limit Although the preset limit may be set higher
28. cted to the neutral earthed pole of the ac power lines supply mains DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE Do not operate the instrument in the presence of flammable gases or fumes KEEP AWAY FROM LIVE CIRCUITS Operating personnel must not remove instrument covers Component replacement and internal adjustments must be made by qualified service personnel Do not replace compo nents with power cable connected Under certain conditions dangerous voltages may exist even with the power cable removed To avoid injuries always disconnect power dis charge circuits and remove external voltage sources before touching components DO NOT SERVICE OR ADJUST ALONE Do not attempt internal service or adjustment unless another person capable of rendering first aid and resuscitation is present SAFETY SYMBOLS Instruction manual symbol the product will be marked with this symbol when it is necessary for the user to refer to the instruction manual Indicate earth ground terminal WARNING The WARNING sign denotes a hazard It calls attention to a procedure practice or the like which if not correctly per formed or adhered to could result inper sonal injury Do not proceed beyond a WARNING sign until the indicated con ditions are fully understood and met The CAUTION sign denotes a hazard It calls attention to an operating procedure or the like which if not correctly per formed or adhered to
29. d electrical defects As soon as the instrument is unpacked inspect for any damage that may have occurred in transit Save all packing materials until the inspection is completed If damage is found a claim should be filed with the carrier The Agilent Technologies Sales and Service office should be notified as soon as possible Mechanical Check This check should confirm that there are no broken knobs or connectors that the cabinet and panel surfaces are free of dents and scratches and that the meter is not scratched or cracked Electrical Check Perform the TURN ON CHECKOUT PROCEDURE in the fol lowing paragraph to confirm that the supply is operational Alternately check the supply more fully using the PERFOR MANCE TEST in the service information section INSTALLATION DATA The instrument is shipped ready for bench operation Before applying power to the supply please read the INPUT POWER REQUIREMENTS paragraph Location and Cooling This instrument is air cooled Sufficient space should be allowed so that a free flow of cooling air can reach the sides and rear of the instrument when it is in operation It should be used in an area where the ambient temperature does not exceed 40 C Outline Diagram Figure 1 illustrates the outline shape and dimensions of the supply Rack Mounting This supply may be rack mounted in a standard 19 inch rack panel either by itself or alongside a similar unit Please see the ACCESSORY pa
30. d voltage is near 1V Check for defective U13 or CR12 Measured voltage is near 0V Check for open Q11 or R81 3 Measure pin 1 of U11 Measured voltage is near 1V Check for defective U11 Measured voltage is near 0V Check for open Q11 or R82 Table A 9 20V PreregulatorIControl Circuit Troubleshooting STEP ACTION RESPONSE PROBABLE CAUSE Set output voltage at 12V 0 5V 1 Measure pin 7 of U14 Measured voltage is 12V Proceed to step 2 Measured voltage is near Check for defective U14B 4 3V 2 Measure pin 1 of U12 Measured voltage is near 1V Check for defective U12 or CR31 Measured voltage is near Check for open Q10 or R56 4 3V 3 Measure pin 1 of U10 Measured voltage is near 1V Check for defective U10 or CR27 Measured voltage is near 0V Check for open Q10 or R55 ADJUSTMENT AND CALIBRATION Current Limit Adjustment 6V Supply To adjust the current limit circuit in the 6V sup ply proceed as follows a Check the setting of the current limit by performing steps p and q on page A 5 Be sure to set the output voltage to 6 volts If reducing the load resistance permits the cur rent to exceed 2 9 A stop turn R6 slightly clockwise and repeat the test If instead the current begins to fall before it reaches 2 6 A turn R6 slightly counter clockwise and repeat the test Recheck the setting and readjust R6 until the test shows that the current limit circuit begins to reduce the current
31. e 0 to 40V 0 5 amp output Connections to the supply s output and to chassis ground are made to binding posts on the front panel The supply s three outputs share a common output terminal which is isolated from chassis ground so that any one output terminal can be grounded Outputs can be floated up to 240V off ground All outputs are protected against overload and short circuit damage The 20V outputs are protected by circuits that limit the output current to 110 of its nominal maximum The over load protection circuit for the 6V output has a current fold back characteristic that reduces the output current as an overload increases until only 1 amp flows through a short cir cuit The 6V output current limit depends on the output termi nal voltage and varies linearly between 2 75 amps at 6 volts and 1 amp at zero volts All controls digital meter and output terminals are located on the front panel One voltage control sets the 0 to 6V and another sets the voltages of the 0 to 20V and 0 to 20V outputs simul taneously These dual tracking outputs are made more versatile by providing a tracking ratio control in addition to the usual volt age control With the tracking ratio control turned fully clockwise to its fixed position the dual outputs have a fixed 1 1 tracking ratio As the 20V voltage control is adjusted the voltage of the negative supply tracks the positive output within 1 Turning the tracking ratio control away from it
32. ected as close to the output terminals as possible A measurement made across the load includes the impedance of the leads to the load The impedance of the load leads can easily be several orders of the magnitude greater than the supply impedance and thus invalidate the measurement To avoid mutual coupling effects each measuring device must be connected directly to the output terminals by separate pairs of leads When performance measurements are made at the front ter minals Figure A 3 the load should be plugged into the front of the terminals at B while the monitoring device is con nected to a small lead or bus wire inserted through the hole in the neck of the binding post at A Connecting the measuring device at B would result in a measurement that includes the resistance of the leads between the output terminals and the point of connection OUTPUT DO B LOAD LEAD MONITOR HERE Figure A 3 Front Panel Terminal Connections Selecting Load Resistors Power supply specifications are checked with a full load resistance connected across the sup ply output The resistance and wattage of the load resistor therefore must permit operation of the supply at its rated out put voltage and current For example a supply rated at 20 volts and 0 5 amperes would require a load resistance of 40 Q at the rated output voltage The wattage rating of this resistor would have
33. fore troubleshooting the 20V supply High output voltage 1 Attempt to turn off Q8 by a Output voltage remains high a Q8 shorted more than 1 shorting emitter to base b Output voltage becomes near zero b Remove short and proceed to greater than 20V of Q8 volt step 2 supply in fixed tracking ratio mode 2 Measure voltage at a Measured voltage is more than a Check for open CR20 or R14 and base of Q7 0 volt check for defective U8A b Measured voltage is less than b Check for defective Q7 0 volt Low output voltage 1 Measure voltage at the Measured voltage is 0 a Check for open Q8 Q3 and R24 more than 1 lower base of Q7 volt b Proceed to step 2 than 20V supply in b Measured voltage is less than fixed tracking ratio 0 volt mode a Check for U8B defective 2 Eliminate current limit a Output voltage increases b Reconnect lead and proceed to circuit as a source of b Output voltage remains low step 3 trouble by disconnecting anode of CR18 a Check for defective U8A 3 Measure voltage at pin3 Measured voltage is near of U8 0 7V b Check for shorted CR21 and b Measured voltage is zero volt CR22 c Check for open R15 shorted R41 c Measured voltage is near or leaky or shorted 06 0 7V A 9 Table A 7 6V Supply Troubleshooting SYMPTOM STEP ACTION RESPONSE PROBABLE CAUSE The 20V supply must operate properly before troubleshooti
34. ge 1 4 for available rack mounting accessory The rack mounting kit includes complete installa tion instructions INPUT POWER REQUIREMENTS Depending on the line voltage option ordered the supply is ready to be operated from one of the power sources listed in Table 1 A label on the rear heat sink shows the nominal input voltage set for the supply at the factory Power Cable To protect operating personnel the supply should be grounded This supply is equipped with a three conductor power cable The third conductor is the ground conductor and when the cable is plugged into an appropriate receptacle the supply is grounded The power supply is equipped at the factory with a power 1 6 cord plug appropriate for the user s location Notify the near est Agilent Sales and Service Office if the appropriate power cord is not included with the supply 90 3 567 212 3 8 354 269 2 10 591 in III LZII I a 318 4 mm 12 534 in L 88 1mm 3 469 Figure 1 Outline Diagram OPERATING INSTRUCTIONS INTRODUCTION The following steps describe the use of the front panel con trols and indicators illustrated in Figure 2 and serve as a brief check that the supply is operational Follow this checkout pro cedure or the more detailed performance test of service infor mation section when the instrument is received and before it
35. he EU market after January 1 2004 Date Bill Darcy Regulations Manager For further information please contact your local Agilent Technologies sales office agent or distributor or Agilent Technologies Deutschland GmbH Herrenberger Stra Be 130 D71034 B blingen Germany Revision B 00 00 Issue Date Created on 11 24 2003 3 10 Document No KIO_10 32 11 24doc doc PM
36. he following paragraphs Line Voltage Option Conversion To convert the supply from one line voltage option to another the following three steps are necessary a After making certain that the line cord is disconnected from a source of power remove the top cover from the supply and set the two sections of the line voltage selec tor switch for the desired line voltage see Figure A 2 b Check the rating of the installed fuse and replace it with the correct value if necessary For Option OE3 use a slow blow 1 0 amp fuse For standard and Option OE9 use a slow blow 1 6 amp fuse c Mark the instrument clearly with a tag or label indicating the correct line voltage to be used lt q FRONT OF SUPPLY Figure A 2 Line Voltage Selector set for 115 Vac PERFORMANCE TESTS The following paragraphs provide test procedures for verify ing the power supply s compliance with the specifications of Table 1 Proceed to the troubleshooting procedures if you observe any out of specification performance CAUTION Before applying power to the supply make certain that its line voltage selector switch S2 is set for the line voltage to be used See CAUTION notice in operating section for additional information on S2 General Measurement Techniques Connecting Measuring Devices To achieve valid results when measuring load regulation ripple and noise and tran sient response time of the supply measuring devices must be conn
37. he preregulator which operates in conjunc tion with the SCR control circuit preregulator control circuit to rectify the tap switched AC voltage This preregulator mini mizes the power dissipated in the series regulating elements by controlling the dc level across the input filter capacitor depending on the output voltage To achieve this tap switch ing is accomplished by two SCRs and one bridge diode CR28 CR32 and CR26 and the SCR control circuit This cir cuit allows the input capacitor to charge to one of two discrete voltage levels depending on the output required When output voltage exceeds the reference level the SCR control circuit fires two SCRs that cause the input capacitor to be charged to the voltage which is necessary for full output of the supply When the two SCRs are not fired the bridge diode CR26 conducts and half the voltage is applied to series pass transistor Q9 The 0 to 20 volt regulator is in turn similar to the 20 volt regulator except that it resembles a complementary mirror image of the latter The output voltages of the 20 volt and 20 volt supplies are both set by the same front panel control and track each other within 1 in the fixed tracking ratio mode Precise tracking of the two outputs is achieved by controlling the positive output conventionally and using that output as the reference voltage for the negative output The reference and bias supply powers the operation amplifi ers and provides
38. idth Fluctuations below the lower frequency limit are treated as drift RMS Measurement The rms measurement is not an ideal representation of the noise since fairly high output noise spikes of short duration could be present in the ripple and not appreciably increase the rms value To measure the ripple and noise of the rms value on each output supply output a Connect the test equipment across the output of the 20V supply as shown in Figure A 7 b on the supply and push 20V METER switch c Turn up output voltage to the full rated value d Check that the rms noise voltage at the true rms voltme ter is less than 0 35mV e Repeat for the remaining supply outputs TRUE rms VOLTMETER 2 4 ohms 20 W for 6V output 40 ahms 20 W for 20 V output Figure A 7 Ripple and Noise rms Measurement Test Setup Peak to Peak Measurement The peak to peak measurement is particularly important for applications where noise spikes could be detrimental to a sensitive load such as logic circuitry To measure the ripple and noise of the peak to peak value on each output supply output a Connect the test equipment across the output of the 20V supply as shown in Figure A 7 but replace the true rms voltmeter with the oscilloscope b Turn on the supply and push 20V METER switch Turn up output voltage to the full rated value Set the oscilloscope to AC mode and bandwidth to 20 MHz Check that the peak
39. is connected to any load equipment Agilent csoma 1 1888 Figure 2 Front Panel Controls Indicators CAUTION Before applying power to the supply check the label on the heat sink to make certain that the supply s line voltage option agrees with the line voltage to be used If the option does not correspond to your line voltage refer to paragraph LINE VOLTAGE OPTION CONVERSION in the service section before applying power TURN ON CHECKOUT PROCEDURE a Connect line cord to power source and turn LINE switch G on b Push 6V METER switch 2 and with no load con nected vary 6V VOLTAGE control over its range and check that the voltmeter responds to the control setting and the ammeter indicates zero Set the 6V VOLTAGE control to 6 volts and short the 6V output terminal to COM common terminal with an insulated test lead The ammeter should indicate a short circuit output current of approximately 1 0 A Remove the short from the output terminals d Push the 20V METER switch 3 and turn Tracking Ratio control 7 fully clockwise to the Fixed position With no load connected vary 20V VOLTAGE control over its range and check that the voltmeter responds to the control setting and the ammeter indi cates zero Set the 20V VOLTAGE control 5 to 20 volts and short the 20V output terminal to the COM terminal with
40. istor As a result the voltage across the series transistor varies so as to hold the output voltage constant at the desired level The high gain of the voltage comparison amplifier and the stability of the reference voltage ensure that input voltage or load current variations have little effect on the output voltage The 0 to 6 volt output is protected by a current foldback lim iter to minimize dissipation in the series regulator transistor during overloads In a current foldback circuit the current limit depends on the output terminal voltage The current limit ranges from 2 75 5 at 6 volts to 1 A 15 with the out put shorted The operating region of the 6 volt regulator out put is enclosed by a heavy line in Figure 3 of the operating section If the operating point reaches the diagonal current limit line a decrease in load resistance moves the operating point down the line reducing the output voltage and current Current foldback is controlled by a second operational ampli fier current comparison amplifier in the regulator that moni tors the dc output current This current comparison amplifier takes control of the output away from the voltage comparison amplifier when the current reaches the design limit Removing the overload restores constant voltage operation auto matically The 0 to 20 volt regulator has a fixed current limit at 105 of its 0 5 amp maximum rated output The input ac line voltage is first applied to t
41. ithin current rating are permitted 0 to 6 V Output Maximum rated output current is 2 5 A at 6 V The maximum available output current decreases with the output voltage setting A current foldback circuit limits the output to 2 75 A 5 at 6 volts and with decreasing voltage reduces the current limit linearly to 1 A 15 at zero volts short circuited TRACKING ACCURACY The 20 V and 20 V outputs track within 1 with the TRACKING ratio control in the Fixed position In variable tracking ratio mode the negative tracking output can be adjusted from less than 0 5 V to within 5 of the setting of the positive output LOAD REGULATION All Outputs Less than 0 01 plus 2 mV for a full load to no load change in output current LINE REGULATION All Outputs Less than 0 01 plus 2 mV for any line volt age change within rating PARD Ripple and Noise Less than 0 35 mV rms 1 5 mV p p 20 Hz 20 MHz Common Mode Current Less than 1 for all outputs 20 Hz 20 MHz All Outputs are available for nominal inputs of 100 and 230 Vac The sup ply is furnished with a detachable 3 wire grounding type line cord The ac line fuse is in an extractor type fuseholder on the rear heat sink LINE FUSE The line fuse is located by the ac line receptacle Check the rating of the line fuse and replace it with the correct fuse if necessary as indicated below These are slow blow fuses Line Voltage Fuse Agilent Part No 100
42. nd two digits indicate the week The remaining digits of the serial number are a unique five digit number assigned sequentially If a yellow Change Sheet is supplied with this manual its pur pose is to explain any differences between your instrument and the instrument described in this manual 1 4 The Change Sheet may also contain information for correct ing errors in the manual OPTIONS Options 0E3 and 0E9 determine which line voltage is selected at the factory The standard unit is configured for 115 Vac 10 47 63 Hz input Option No Description OEM 115 Vac 10 47 63 Hz Input 0 230 Vac 10 47 63 Hz Input OE9 100 Vac 10 47 63 Hz Input 012 One additional operating and service manual shipped with the power supply ACCESSORY The accessory listed below may be ordered from your local Agilent Technologies Sales Office either with the power sup ply or separately Refer to the list at the rear of the manual for address Agilent Part No Description 5063 9767 Rack Kit for mounting one or two 3 1 2 high supplies in a standard 19 rack The rack mount kit is needed for rack mounting of the E3630A power supply DESCRIPTION This constant voltage current limiting triple output power sup ply combines two 0 to 20V tracking outputs rated at 0 5 amps with an additional single output that is rated at 0 to 6 volts and 2 5 amps The 20V and 20V tracking outputs can also be used in series as a singl
43. ng the 20V supply High output voltage Attempt to turn off Q1 by Output voltage remains high a Q1 shorted higher than rating shorting emitter to base Output voltage becomes near zero b Remove short and proceed to of Q1 volt step 2 Measure voltage at Measured voltage is more than a Check for defective Q4 base of Q4 0 6V Measured voltage is less than b Check for open CR6 R11 and 0 6V check for defective U2A Low output voltage Measure voltage at the Measured voltage is less than a Check for open Q1 Q6 R25 or lower than rating base of Q4 0 6V CR5 Measured voltage is more than b Proceed to step 2 0 6V Eliminate current limit Output voltage increases a Check for U2B defective circuit as a source of Output voltage remains low b Reconnect lead and proceed to trouble by disconnecting step 3 anode of CR7 Measure voltage at Measured voltage is near a Check for defective U2A pin 3 of U2 0 7V Measured voltage is zero volt b Check for CR9 and CR10 shorted Measured voltage is near c Check for open R29 shorted R11 0 7V or leaky or shorted C5 Table A 8 20V Preregulator Control Circuit Troubleshooting STEP ACTION RESPONSE PROBABLE CAUSE Set output voltage at 12V 0 5V 1 Measure pin 1 of U14 Measured voltage is 12V Proceed to step 2 Measured voltage is near Check for defective U14A 4 3V 2 Measure pin 1 of U13 Measure
44. ng the output at full load RI should have a power rating of at least 20 watts h Close the switch and set the 6V VOLTAGE control so that the DVM indicates a voltage drop across the current sam pling resistor that corresponds to a current of 2 5 amps i Push the 6V METER switch and verify that the front panel ammeter indication is within 0 5 2 counts of 2 5 amps 2 47A to 2 53 j Check the rated output and ammeter accuracy of the 20V and 20V supplies similarly by connecting the test setup of Figure A 5 to each output in turn For each 20V supply make the total resistance of RI and the current sampling resistor 40 Q set the 20V VOLTAGE control for a current indication on the DVM of 0 5 A check that the panel meter indication is within 0 5 2 counts of 0 5 A 0 48A to 0 52 Figure A 5 Output Current Test Set Up Current Limit k Disconnect all loads from the supply Connect the test setup shown in Figure 5 to the 20 volt output Substitute a short for and leave the load circuit switch open m Set the voltage of the 20V supplies to 20 volts n Close the load switch and determine the current flow through the current sampling resistor meter shunt by measuring its voltage drop with the DVM The current should be 0 55A 5 0 5225A to 0 5775A o Check the current limit of the 20V supply in the same way lts short circuit current should also be 0 55A 5 0 5225A to 0 5775A p Connect
45. o Table A 10 Agilent Technologies Part Number Total quantity used in that assembly Description Manufacturer s supply code number Refer to Table A 11 for manufacturer s name and address f Manufacturer s part number or type Mechanical and miscellaneous parts are not identified by ref erence designator ORDERING INFORMATION To order a replacement part address order or inquiry to your local Agilent Technologies sales office see lists at rear of this manual for addresses Specify the following information for each part Model complete serial number of the power sup ply Agilent Technologies part number circuit reference des ignator and description Table A 10 Reference Designators nD lt c sx Assembly Capacitor Diode Signaling Device light Fuse Pulse Generator Jack Inductor Transistor Resistor Switch Transformer Test Point Zener Diode Integrated Circuit Wire Table A 11 Code List of Manufacturers CODE MANUFACTURER ADDRESS 01295 Texas Instruments Inc Semicon Comp Div Dallas TX 14936 General Instruments Corp Semicon Prod Hicksville N Y 27014 National Semiconductor Corporation Santa Clara CA 28480 Agilent Technologies Palo Alto CA 04713 Motorola Semiconductor Products Phoenix AZ 32997 Bourns Inc Riverside CA Table A 12 Replaceable Parts List REFERENCE PART Q TY DESCRIPTION DESIGNATION NUMBER 81
46. or20 G 21004305 1 RESISTOR TRMR 10K 10 TKF TOP ADJ 25 TAN 32007 820677103 mz 07570465 h RESISTOR 100K 1 125WTFTC 0 100 23 075704 2 RESISTOR 1 21K 1 125W TF TC20 100 28480 R RESISTOR 26 1K 1 125WTFTO 100 5 RESISTOR 21 6 T 125WTeTC 0 100 ma osesaae__ 1 RESISTOR 147 1 126w TE 0100 5 Rats 0688667 2 RESISTOR 25K 0 1 125W TFTC 0 100 28480 me o757 0280__ 1__ RESISTOR 1K 1 126wTFTC 0 100 280 m 06983182 i RESISTOR 261 1 125W IF TO 0 100 mazz oos8a166 2 RESISTOR 147K 1 125W TF 100 28480 R19 21 27 31 46 74 0757 0442 RESISTOR 10K 1 125W TC 0 100 28480 75 78 586 51557 RESISTOR THEW TF TE O 100 2226 07701 2 RESISTOR 11 SWTFTC 0 100 aeaeo m 07570725 SWTFTC 0 100 aeaeo R 528 1 RESISTOR 11 125WTFTO 0 100 290 07570 2 RESISTOR 7 6K 1 125W TF TC 0 100 28480 R305152 07570200 RESISTOR 562K 1 28480 oeseorza t RESISTOR 10 2K 125W TF TC 0 100 28480 eas 068926 t RESISTOR 261K 01 126WTFTG 07 100 28480 R34374348 06980083 4 RESISTOR 1 96K 1 125W TF TC 0 100 2840 3527
47. ote Agilent Technologies TRIPLE OUTPUT POWER SUPPLY Agilent MODEL E3630A OPERATING AND SERVICE MANUAL Manual Part No 5959 5329 April 2000 Edition 7 SAFETY SUMMARY The following general safety precautions must be observed during all phases of operation service and repair of this instrument Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design manufacture and intended use of the instrument Agilent Technologies assumes no liability for the customer s failure to comply with these requirements BEFORE APPLYING POWER Verify that the product is set to match the available line volt age and that the correct fuse is installed GROUND THE INSTRUMENT This product is a Safety Class instrument provided with a protective earth terminal To minimize shock hazard the instrument chassis and cabinet must be connected to an electrical ground The instrument must be connected to the ac power supply mains through a three conductor power cable with the third wire firmly connected to an electrical ground safety ground at the power outlet Any interruption of the protective grounding conductor or disconnection of the protective earth terminal will cause a potential shock hazard that could result in personal injury If the instrument is to be energized via an external autotransformer for voltage reduc tion be certain that the autotransformer common terminal is conne
48. outputs ELECTRONIC A regulated AC source is used in this load effect testing configuration to REGULATED SOURCE maintain the AC input at a predetermined value This will ensure that the test results reflect changes in VoUT only with respect to load current changes Figure A 6 Basic Test Setup 5 Line Regulation Source Effect Definition The change AEcur in the static value of dc output voltage resulting from a change in ac input voltage from a minimum to a maximum value 10 of nominal voltage To check the line regulation a Connect a variable autotransformer between the input power source and the power supply line plug b Connect the test equipment across the output of the 20V supply as shown in Figure A 6 Operate the elec tronic load in constant current mode and set its current to the full rated value of the 20V supply c Adjust the autotransformer for a low line input 10 of nominal voltage d Turn on the power adjust the output of the supply to its maximum rated voltage and record the DVM indication e Adjust the autotransformer for high line voltage input 10 of nominal voltage and recheck the DVM indica tion It should be within 0 01 plus 2mV of the reading in step d f Repeat steps b through e for each of the remaining supply outputs Ripple and Noise Definition Ripple and noise are measured in the rms or peak to peak value over a 20 Hz to 20 MHz bandw
49. r shunt The load current through a shunt must be fed from the extremes of the wire leading to the resistor while the sampling connections are made as close as possible to the resistance portion itself Figure A 4 Current Sampling Resistor Connections Rated Output Tracking Meter Accuracy and Cur rent Limit To check that all supplies will furnish their maximum rated output voltage and current that the 20V outputs track each other that the front panel meters are accurate and that the current limit circuits function proceed as follows Voltmeter Accuracy 6V a With no loads connected turn on the supply connect a digital voltmeter between the 6V terminal and common COM and set the 6V VOLTAGE control so that the DVM indication is as near as possible to 5 volts b Push the 6V METER switch on and check the front panel voltmeter indication It should be within 0 5 2 counts of the DVM indication 4 96V to 5 04 Voltmeter Accuracy 20V a With no loads connected turn on the supply connect a digital voltmeter between the 20V terminal and common COM and set the 20V VOLTAGE control so that the DVM indication is as near as possible to 17 volts b Push the 20V METER switch on and check the front panel voltmeter indication It should be within 0 5 2 counts of the DVM indication 16 90V to 17 10V Set the TRACKING RATIO control to the FIXED position and check the 20V and 20V ranges of
50. s fully clockwise position switches the dual tracking outputs into a variable tracking ratio mode In this mode the voltage of the negative output can be set lower than that of the positive output The tracking ratio control allows the negative supply s output to be set to any value between a maximum that is within 5 of the positive supply s output and a minimum that is less than 0 5 volts Once a ratio is established by the tracking ratio control the ratio of the positive output voltage to the negative output voltage remains constant as the 20V voltage control varies the 0 to 20V output over its range The front panel also contains a line switch three overload indicators for 6V output 20V output and 20V output a voltmeter and an ammeter and three push button meter switches The push buttons select one of the supply s three outputs for display The voltmeter and ammeter always moni tor any one supply simultaneously In addition to the standard 115 Vac 10 47 to 63 Hz input two other line voltage options Table 1 AC INPUT OEM OE9 OE3 115 Vac 10 47 63 Hz 115 VA 84 W 100 Vac 10 47 63 Hz 115 VA 84 W 230 Vac 10 47 63 Hz 115 VA 84 W DC OUTPUT and OVERLOAD PROTECTION 0 to 20 V Outputs Maximum rated output current is 0 5 A Short circuit output current is 0 55 A 5 and a fixed cur rent limit circuit limits the output of each supply to this maxi mum at any output voltage setting Unbalanced loads w
51. sha are alee warden ay ge 1 4 DESCRIPTION eked Ala hehe Aes Sawn We PA Re Se 1 4 LINE RUSE ssi ac c s aca st tees whale uqa Qu Suk alaq aah dna od ah 1 5 SPECIFICATIONS 2 seen eee ee te ted Gal de Oo a Be a eae al 1 5 INSTALLATION i u utu dec aa ead 1 6 INITIAL INSPECTION wie cS dike kd od oe ele Me Go hi ws 1 6 Mechanical Check 2 ar ee i 1 6 Electrical GHeGky aN u usa 1 6 INSTALLATION Su u a ay mape hemes ays 1 6 LOCatlon and Cooling u L S Cap 1 6 Outline Diagram Aes oe ee huu ee eb 1 6 Rack ISO 1 6 INPUT POWER REQUIREMENTS cee eee 1 6 Power Cable ize uw cS ts fecal uama Gola Pala ois Jato Sho au alt aa 1 6 OPERATING INSTRUCTIONS a eee 1 6 INTRODUCTION Z zt Roel ce ates va tal del berate te 1 6 TURN ON CHECKOUT PROCEDURE 1 7 OPERATION Puya ee pl eee eee eh Bh 1 7 Tracking Ratio Control 1 7 Overload Protection Circuifs _ 1 7 Operation Beyond Rated Output
52. t Equipment Required The following Table A 1 lists the equipment required to per form the various procedures described in this section Table A 1 Test Equipment Required TYPE REQUIRED CHARACTERISTICS USE RECOMMENDED MODEL Oscilloscope Sensitivity 100 pV Display transient response and ripple Agilent 54600A Bandwidth 20 MHz 100 MHz and noise waveforms RMS Voltmeter True rms 20 MHz bandwidth Sensitivity 1 mV Accuracy 5 Measure rms ripple and noise voltage Multimeter Resolution 100 nV Accuracy 0 0035 Measure dc voltages Agilent 34401A Electronic Load Voltage Range 240 Vdc Current Range 10 Adc Open and short switches Transient on off Measure load and line regulation Agilent 6063A Resistive Loads RI 40 Q 20 W 240 20 W Measure ripple and noise A 2 Table 1 Test Equipment Required Cont d Current Sampling 100 0 1 15 W Resistor Shunt Variable Voltage Range 85 130 and 200 260 Auto Transformer Volts Measure output current Vary ac input Operation Verification Tests The following tests assure that the power supply is per forming properly They do not however check all the speci fied parameters tested in the complete performance test described below Proceed as follows a Perform turn on checkout procedure given in page 1 7 b Perform the load regulation performance tests given in t
53. than the average output current high peak currents as occur in pulse loading may exceed the pre set current limit and cause crossover to occur and degrade performance REVERSE CURRENT LOADING An active load connected to the supply may actually deliver a reverse current to the supply during a portion of its operating cycle An external source can not be allowed to pump current into the supply without risking loss of regulation and possible damage to the output capacitor of the supply To avoid these effects it is necessary to preload the supply with a dummy load resistor so that the supply delivers current through the entire operating cycle of the load devices OUTPUT CAPACITANCE An internal capacitor across the output terminals of the supply helps to supply high current pulses of short duration during constant voltage operation Any capacitance added externally will improve the pulse current capability but will decrease the load protection provided by the current limiting circuit A high current pulse may damage load components before the aver age output current is large enough to cause the current limit ing circuit to operate REVERSE VOLTAGE PROTECTION A diode is connected across the output terminals with reverse polarity This diode protects the output electrolytic capacitors and the series regulator transistors from the effects of a reverse voltage applied across the output terminals Since series regulator transistors can not
54. the test setup shown in Figure A 5 to the 6V output Close the switch set the total resistance of and the current sampling resistor to an initial value of 2 4 or greater and set the output voltage to 6 volts q Reduce the value of R gradually while observing the out put current indicated by the DVM The current should increase to a maximum of 2 75A 5 2 6125A to 2 8875A before it begins to decrease Connect a short across R and then recheck the current indicated by the DVM The short circuit current of this out put should be 1A 15 0 85A to 1 15A Disconnect the test setup from the supply Load Regulation Load Effect Definition The change AE y in the static value of out put voltage resulting from a change in load resistance from open circuit to the value that yields maximum rated output current or vice versa To check the load regulation a Connect the test equipment across the output of the 20V supply as shown in Figure A 6 Operate the elec tronic load in constant current mode and set its current to the full rated value of the 20V supply b on the supply and adjust its voltage to its maximum rated value c Record the voltage indicated on the DVM d Operate the electronic load in open input off mode and recheck the DVM indication after reading settles It should be within 0 01 plus 2mV of the reading in step e Repeat steps a through d for each of the remaining supply
55. ting region of the 6V output is enclosed by heavy lines in Figure 4 The maximum rated output current is 2 5 A and the current limit is factory adjusted to operate at 2 75 A 5 when the output is 6 volts At lower output voltages the circuit reduces the maximum obtainable output current linearly until 1 A 15 flows when the output is shorted The short circuit cur rent can not be adjusted NOTE During the actual operation of the 20V and 6V outputs if a load change causes the current limit to be exceeded the OL LED is lighted If overload conditions occur the 20V supplies will protect the load by limiting the current to 0 55 A and the 6V supply will protect the load by reducing both voltage and current simultaneously along the foldback locus as shown in Figure 4 The 20V and 6V supplies are self restoring that is when the overload is removed or corrected the output voltage is automatically restored to the previously set value Operation Beyond Rated Output The supply may be able to provide voltages and currents greater than its rated maximum outputs if the line voltage is at or above its nominal value Operation can be extended up to 5 over the rated output without damage to the supply but performance can not be guaranteed to meet specifications in OPERATING REGION E ACTUAL CURRENT LIMIT Figure 3 Current Limit Characteristic of the 6V Supply this region If the line voltage is maint
56. to peak noise is less than 1 5 mV f Repeat for the remaining supply outputs Common Mode Current Definition Common mode current is that ac current compo nent which exists between any or all supply or output lines and chassis ground To measure the common mode current a Connect the full load for 6V output b Connect a 100 kO resistor Rs and a 2200 pF capacitor in parallel between common terminal COM and chassis ground Connect the DVM across Rg At d Turn on the supply e Record the voltage across Rg and convert it to current by dividing this voltage by Rg f Check that the current is less than 1 uA Load Transient Response Time Definition This is the time for the output voltage to return to within a specified band around its voltage following a change from full load to half load or half load to full load To measure the load transient response time a Connect the test equipment across the output of the 20V supply as shown in Figure A 6 but replace the DVM with the oscilloscope Operate the electronic load in constant current mode b Turn on the supply Turn up output voltage to the full rated value Set the electronic load to transient operation mode between one half of supply s full rated value and supply s full rated value at a 1 KHz rate with 50 duty cycle e Set the oscilloscope for ac coupling internal sync and lock on either the positive or negative load transient
57. withstand reverse voltage either diodes are also connected across them When operat ing supplies in parallel these diodes protect an unenergized supply that is in parallel with an energized supply ACTIVE LOAD DEVICE Figure 4 Reverse Current Loading Solution 1 9 SERVICE INFORMATION DISPLAY POWER SUPPLY GND 12 T 5 1V 5V 12 for DSP REFERENCE AND BIAS SUPPLY DRIVER OR GATE CV ERROR AMP ry RECTIFIER AND SERIES FILTER REGULATOR CURRENT FOLDBACK i VOLTAGE CURRENT DISPLAY CIRCUIT DISPLAY CIRCUIT DRIVER G PREREGULATOR CONTROL CIRCUIT CV ERROR AMP METER INPUT CIRCUIT SERIES REGULATOR RECTIFIER FILTER AND PREREGULATOR SERIES REGULATOR

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