Agilent Technologies E3614A Operating And Service Manual Download

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Agilent E361xA 60W BENCH SERIES DC POWER SUPPLIES

OPERATING AND SERVICE MANUAL FOR MODELS:

Agilent E3614A
Agilent E3615A
Agilent E3616A
Agilent E3617A

Manual Part No. 5959-5310

April 2000

Edition 8

1-1

Summary of Contents for E3614A

Page 1: ...Agilent E361xA 60W BENCH SERIES DC POWER SUPPLIES OPERATING AND SERVICE MANUAL FOR MODELS Agilent E3614A Agilent E3615A Agilent E3616A Agilent E3617A Manual Part No 5959 5310 April 2000 Edition 8 1 1 ...

Page 2: ...o not replace components with power cable connected Under certain conditions dangerous volt ages may exist even with the power cable removed To avoid inju ries always disconnect power discharge circuits and remove external voltage sources before touching components DO NOT SERVICE OR ADJUST ALONE Do not attempt internal service or adjustment unless another per son capable of rendering first aid and...

Page 3: ...TRUCTIONS 1 7 INTRODUCTION 1 7 TURN ON CHECKOUT PROCEDURE 1 7 OPERATING MODES 1 8 LOCAL OPERATING MODE 1 8 Constant Voltage Operaton 1 8 Constant Current Operation 1 8 Overvoltage Protection OVP 1 8 CONNECTING LOADS 1 8 OPERATION BEYOND RATED OUTPUT 1 8 REMOTE OPERATING MODES 1 9 Remote Voltage Sensing 1 9 Remote Analog Voltage Programming 1 9 MULTIPLE SUPPLY OPERATION 1 10 NORMAL PARALLEL OPERATI...

Page 4: ...is manual The change sheet may also contain information for correcting errors in the manual OPTIONS Options 0EM 0E3 and 0E9 determine which line voltage is selected at the factory The standard unit is configured for 115 Vac 10 For information about changing the line voltage setting see paragraph INPUT POWER REQUIREMENTS page 1 6 0EM Input power 115 Vac 10 47 63 Hz 0E3 Input power 230 Vac 10 47 63 ...

Page 5: ...NGE 0 to 40oC for full rated output Maximum current is derated 1 per degree C at 40oC 55oC TEMPERATURE COEFFICIENT Maximum change in output per oC after a 30 minute warm up Constant Voltage Less than 0 02 plus 500 µV Constant Current E3614A Less than 0 02 plus 3 mA E3615A Less than 0 02 plus 1 5 mA E3616A Less than 0 02 plus 1 mA E3617A Less than 0 02 plus 0 5 mA STABILITY OUTPUT DRIFT Maximum cha...

Page 6: ...It is neces sary only to connect the instrument to a source of power and it is ready for operation 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 40oC Maximum current is derated 1 ...

Page 7: ...isplay of actual output voltage or OVP shutdown setting 7 AMPS Display Digital display of actual output current or output current setting 8 CV LED Indicator Output voltage is regulated when lighted This means the power supply is operating in the constant volt age mode 9 CC LED Indicator Output current is regulated when lighted This means the power supply is operating in the constant cur rent mode ...

Page 8: ...he OVP shutdown voltage as set by the OVP ADJUST control the supply s OVP circuit dis ables the output causing the output voltage and current to drop to zero During OVP shutdown the OVP LED lights False OVP shutdowns may occur if you set the OVP shutdown too close to the supply s operating voltage Set the OVP shut down voltage 4 of output 2 0 V or more above the output volt age to avoid false shut...

Page 9: ...terminals to the load and connect ing the sense leads from the S and S terminals to the load as shown in Figure 5 Observe polarity when connecting the sensing leads to the load Output Noise Any noise picked up on the sense leads will appear at the supply s output voltage and may degrade CV load regulation Twist the sense leads to minimize the pickup of exter nal noise and run them parallel and clo...

Page 10: ...RMAL PARALLEL OPERATION Two or more power supplies being capable of CV CC automatic cross over operation can be connected in parallel to obtain a total output current greater than that available from one power supply The total output current is the sum of the output currents of the individual power supplies The output of each power supply can be set separately The output voltage controls of one po...

Page 11: ...rogramming To remote program with auto parallel operation set up only the master unit for remote pro gramming according to the remote programming instructions Figure 10 Auto Parallel Operation of Three Supplies NORMAL SERIES OPERATION Series operation of two or more power supplies can be accom plished up to the output isolation rating of any one supply to obtain a higher voltage than that availabl...

Page 12: ... µF capacitor in paral lel with R2 in two supplies operation or R2 and R4 in three supplies operation to ensure the stable operation Setting Voltage and Current Use the master unit s controls to set the desired output voltage and current The VOLTAGE control of the slave unit is disabled Turning the voltage control of the master unit will result in a continuous variation of the output of the series...

Page 13: ...ion the master s output voltage Vm is the same as its voltage setting and the slave s output voltage for two units operation is Vm R2 R1 R2 The VOLTAGE control of the slave unit is dis abled Set the CURRENT controls of master and slave units above the required currents to assure CV operation of master and slave units Overvoltage Protection Set the OVP shutdown voltage in each unit so that it shuts...

Page 14: ...e may damage load components before the average output current is large enough to cause the current limit ing circuit to operate The effect of the output capacitor during constant current opera tion are as follows a The output impedance of the power supply decreases with increasing frequency b The recovery time of the output voltage is longer for load resistance changes c A large surge current cau...

Page 15: ...mer has three sections N1 N2 and N3 each of which has a different turns ratio with respect to the primary winding At the begin ning of each half cycle of the input ac the control circuit determines whether one pair both or none of the SCR will be fired If neither SCR is fired the bridge diode CR13 receives an ac input voltage that is determined by N1 turns and the input capacitors charge to a corr...

Page 16: ...cause an output which lies outside the operating region For either constant voltage or constant current operation the proper choice of front panel voltage and current control settings insures optimum pro tection for the load device as well as full protection for the power supply The reference and bias circuit provides stable reference volt ages which are used by the constant voltage current error ...

Page 17: ...derably easier to use than load resis tor It eliminates the need for connecting resistors or rheostats in parallel to handle the power it is much more stable than carbon pile load and it makes easy work of switching between load conditions as is required for the load regulation and load transient response tests Current Monitoring Resistor Rs To eliminate output current measurement error caused by ...

Page 18: ...ent to the full rated value of the power supply b Connect the supply to the ac power line through a variable autotransformer which is set for low line volt age 104 Vac for nominal 115 Vac 90 Vac for nominal 100 Vac and 207 Vac for nominal 230 Vac c Turn the supply s power on and turn CURRENT con trol fully clockwise d Adjust VOLTAGE control until the front panel VOLTS display indicates exactly the...

Page 19: ...y increase the rms value Test Parameter Measured Variable Output Voltage rms Expected Results Less than 200 µV rms Test Procedure a Connect the test equipment as shown in Figure A 6 b Turn the supply s power on and turn CURRENT con trol fully clockwise c Turn up output voltage to the full rated value Check that the supply s CV indicator remains lighted Reduce VOLTAGE control if not lighted d Check...

Page 20: ...es by ohmic value of Rs Load Regulation Load Effect Definition CC Load regulation is the change in the steady state value of dc output current due to a change in load resistance from short circuit to full load or from full load to short circuit Test Parameter Measured Variable Output Current Expected Results Less than 0 01 plus 250 µA Test Procedure a Connect the DVM across Rs in Figure A 4 Operat...

Page 21: ...spectively Figure A 8 CC PARD RMS Measurement Test Setup CC Drift Stability Definition The change in output current for the first 8 hours fol lowing a 30 minute warm up with constant input line voltage constant load resistance and constant ambient temperature Test Parameter Measured Variable Output Current Expected Results Less than 0 1 plus 10 mA Test Procedure a Connect the DVM across Rs in Figu...

Page 22: ...efore attempting overall troubleshooting ensure that the rear panel switches M S 1 and M S 2 be set to MAS TER position and CV CC and SENSE to LOCAL position 1 Check that input power is available and check the power cord and rear panel line fuse When replacing line fuse be certain to select fuse of proper rating for line voltage being used 2 In almost all cases the trouble source can be caused by ...

Page 23: ...ul to check the turn on overshoot control circuit which includes U20 and Q10 The function of the control circuit is to slow down the rising speed of the 15 V bias the moment the power is turned on This function prevents the supply from false OVP tripping the moment the power is turned on After the troubles has been isolated to overvoltage protection cir cuit troubleshooting can proceed as describe...

Page 24: ...ragraph or Table A 7 Table A 3 Overall Troubleshooting Cont d Table A 4 High Output Voltage Troubleshooting STEP ACTION RESPONSE PROBABLE CAUSE 1 Check turn off of Q1 and Q4 by shorting Q9 emitter to collector a Output voltage remains high b Output voltage decreases a Q1 or Q4 shorted b Remove short and proceed to step 2 2 Check turn on of Q9 by shorting point 1 to 12 V a Output voltage remains hi...

Page 25: ...igh voltage 0 7 V b Low voltage 0 V a CR15 CR18 U2 U21 defective b Proceed to step 3 3 Voltage from TP6 common to U4 pin 1 a Low voltage 12 V b High voltage 5 V a U3 defective b Proceed to step 4 4 Voltage from TP6 common to U5 pin 1 a High voltage 15 V b Low voltage 12 V a U4 defective b Proceed to step 5 5 Voltage from pin 6 to pin 7 of U5 a Measured voltage is positive b Measured voltage is neg...

Page 26: ...tage Protection Circuit Troubleshooting STEP ACTION RESPONSE PROBABLE CAUSE 1 Short U19 pin 4 to TP6 a Shutdown release OVP indicator OFF b Output voltage remains shutdown 0 V a U20 defective or C57 shorted b Proceed to step 2 2 Measure the voltage from TP6 common to TP9 a High voltage 5 V b Low voltage 0 V a U19 defective or proceed step 3 b U4D defective 3 Measure the voltage from TP6 common to ...

Page 27: ...1 MAIN BOARD ASSY 16 28480 E3617 60002 1 MAIN BOARD ASSY 17 28480 5021 8128 1 PCB MAIN FOR E3614A E3615A 14 15 28480 5021 8139 1 PCB MAIN FOR E3616A E3617A 16 17 28480 C1 3 47 0160 4835 3 CAP FXD 1UF 10 50V CER X7R ALL 28480 C2 0180 4360 1 CAP FXD 1000UF 25V 20 AL ELECTLT 14 28480 C2 0180 4355 1 CAP FXD 470UF 50V 20 AL ELECTLT 15 28480 C2 0180 4452 1 CAP FXD 330UF 63V 20 AL ELECTLT 16 28480 C2 018...

Page 28: ...5 66 0160 0301 4 CAP FXD 0 012UF 10 200V PE FL 17 28480 R1 2 0811 3478 2 RESISTOR 0 1 1 5W PWN TC 0 90 14 28480 R1 2 0811 3839 2 RESISTOR 0 2 1 5W PWN TC 0 90 15 28480 R1 2 0811 3864 2 RESISTOR 0 6 5 5W PWN TC 0 90 16 28480 R1 2 0811 3861 2 RESISTOR 1 78 1 5W PWN TC 0 90 17 28480 R3 7 21 22 105 0698 3160 6 RESISTOR 31 6K 1 125W TF TC 0 100 ALL 28480 R4 71 73 76 112 0757 0465 5 RESISTOR 100K 1 125W...

Page 29: ... 28480 R41 0698 4473 1 RESISTOR 8 06K 1 125W TF TC 0 100 14 28480 R41 0757 0454 1 RESISTOR 33 2K 1 125W TF TC 0 100 15 28480 R41 0698 4503 1 RESISTOR 66 5K 1 125W TF TC 0 100 16 28480 R41 0757 0467 1 RESISTOR 121K 1 125W TF TC 0 100 17 28480 R42 44 54 56 0757 0346 4 RESISTOR 10 1 125W TF TC 0 100 14 15 28480 R42 44 54 56 0698 3438 4 RESISTOR 147 1 125W TF TC 0 100 16 17 28480 R43 55 0757 0293 2 RE...

Page 30: ...SISTOR 147K 1 125W TF TC 0 100 14 28480 R79 0698 3460 1 RESISTOR 422K 1 125W TF TC 0 100 15 28480 R79 0698 8825 1 RESISTOR 681K 1 125W TF TC 0 100 16 28480 R79 0698 8827 1 RESISTOR 1M 1 125W TF TC 0 100 17 28480 R81 122 0698 3157 2 RESISTOR 19 6K 1 125W TF TC 0 100 ALL 28480 R82 0698 8123 1 RESISTOR 26 1K 1 125W TF TC 0 100 14 15 28480 R82 0757 0461 1 RESISTOR 68 1K 1 125W TF TC 0 100 16 17 28480 ...

Page 31: ... 8 PIN DIP P ALL 28480 U11 1826 1075 1 IC OP AMP GP DUAL 8 PIN DIP P ALL LF442CN 27014 U12 1826 0468 1 IC V RGLTR OV V SEN 2 3 37 8V 8 DIP P ALL MC3423P1 04713 U13 1826 0393 1 IC V RGLTR ADJ POS 1 2 37V TO 220 PKG ALL LM317T 27014 U14 1826 0221 1 IC V RGLTR FXD NEG 11 5 12 5V TO 220 ALL MC7912CT 04713 U18 1826 0346 1 IC OP AMP GP DUAL 8 PIN DIP P ALL LM358N 27014 U19 1820 1197 1 IC GATE TTL LS NAN...

Page 32: ...1 9100 5070 1 TRANSFORMER POWER 17 28480 T2 3 9100 4969 2 TRANSFORMER PULSE PRI IND 5MH 14 15 28480 L1 9170 0894 1 CORE SHIELDING BEAD ALL 28480 MISCELLANEOUS J1 1252 4159 1 CONNECTOR POST TYPE 2 5 PIN SPCG 11 CO NT ALL 28480 TP1 16 0360 2359 16 TERMINAL TEST POINT 230IN ABOVE ALL 28480 S1 2 3 4 3101 3237 4 SWITCH SL SPDT SUBMIN 6A 250VAC ALL 28480 S5 3101 3238 1 SWITCH SL DPDT SUBMIN 6A 250VAC AL...

Page 33: ...W 100 1 125W R46 53 10 1 25W 10 1 25W R47 50 499 1 125W 499 1 125W R49 51 1 96K 1 125W 1 96K 1 125W R58 0 2 1 10W 0 2 1 10W 0 6 1 10W 1 78 1 5W R59 0 2 1 10W 1 78 1 5W R60 390 5 3W 1K 5 3W 1 52K 5 3W 2 6K 5 3W R62 42 2K 1 125W 105K 1 125W 475K 1 125W 825K 1 125W R70 178K 1 125W 383K 1 125W 23 7K 1 125W 100K 1 125W R72 13 3K 1 125W 6 19K 1 125W 51 1K 1 125W 26 1K 1 125W R74 75 12 1K 1 125W 12 1K 1 ...

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Page 38: ...upplement keeps your manual up to date The supplement which consists of additional pages for your manual is shipped with the manual that it updates Additional pages have page numbers with a lower case letter For example if one additional page is added between pages 1 10 and 1 11 it will be numbered 1 10 1 This supplement is new information that was not described in the manual for remote programmin...

Page 39: ...n following connections it is recommended to use Figure 2 Figure 4 or Figure 6 if the negative terminal of the Programming Voltage is not floted from its circuits Constant Voltage Mode The programming voltage is not isolated from the power supply output The power supply may be programmed with a voltage that is common to either the plus output or the minus output Programming Voltage Common to the P...

Page 40: ...each model are as below Alternative Voltage Programming Using Resistors Programming Voltage Common to the Plus Output Figure 3 The M S2 switch must be in the down position For best results place a 0 1µF capacitor in parallel with R2 Vin R1 R2 x Vout Vout R2 R1 x Vin Where Vout is the power supply output voltage Vin is the programming voltage R1 and R2 should be in the 1KΩ to 100KΩ range Model A 1 ...

Page 41: ...less than the programming voltage The M S2 switch must be in the down position For best results place a 0 1µF capacitor in parallel with R2 Vin R1 R2 R2 x Vout Vout R2 R1 R2 x Vin Where Vout is the power supply output voltage Vin is the programming voltage R1 and R2 should be in the 1KΩ to 100KΩ range ...

Page 42: ...he transconductance in Amp Volt and the values of each model are as below Constant Current with Current Programming When using current to program the power supply the source must have a dynamic range of 10 volts when the programming source is common to the plus output and 10 volts plus the maximum output voltage expected when the programming source is common to the minus output of the power supply...

Page 43: ... supply can be monitored across the internal current monitoring resistor One side of the resistor is at the output and A3 the other side of the resistor is at A1 The table below shows the resistor value and conversion factors To obtain the current divide the measured voltage by the resistor value or multiply the amps V times the voltage measured Model A A µA 1 A µV A E3614A 0 055 18 E3515A 0 0278 ...

Page 44: ...amming Connections Remote resistor programming requires changing the setting of the switches and connecting external resistors between and terminals of CV and VREF terminal or and terminals of CC and VREF terminal Any noise picked up on the programming leads will appear on the power supply s output and may degrade regulation To reduce noise pickup use a twisted or shielded pair of wires for progra...

Page 45: ...e rear panel and all others up Iout A x VREF x R R R2 100 Where Iout is the power supply output current A is the gain factor and the values of each model are as below VREF is between 10 11 V and 11 40 V R 92800 x R1 92800 R1 R1 R2 40 kohm Model A E3614A 0 6 E3515A 0 3 E3616A 0 17 E3617A 0 1 ...

Page 46: ...ry 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 ...

Page 47: ...rdingly Conforms with the following product standards The product herewith complies with the requirements of the EMC Directive 89 336 EEC including 93 68 EEC and carries the CE Marking accordingly European Union As detailed in Electromagnetic Compatibility EMC Certificate of Conformance No TCF CC TCF 00 102 based on Technical Construction File TCF No ANJ12 dated 20 12 2000 EMC Assessed by Celestic...

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