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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. Keysight 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  I 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 
connected 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

Caution, risk of danger (refer to this 

manual  for  specific  Warning  or  Caution 
information)

Direct current (DC)

Alternating current (AC)

Protective conductor terminal

Out position of a bi-stable push control

In position of a bi-stable push control

Earth (ground) terminal

Positive binding post

Negative binding post

Frame or chasis terminal

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,  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.

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 Keysight 
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.

CAUTION

WARNING

NOTE

Summary of Contents for e3620a

Page 1: ...Keysight E3620A Dual Output Power Supply Operating and Service Manual ...

Page 2: ......

Page 3: ...1 1 ...

Page 4: ...Keysight s product price only if Customer pays Key sight international prices defined as destination local currency price or U S or Geneva Export price If Keysight 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 Keysight The warranty period begins on the date...

Page 5: ...erous 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 Caution risk of danger refer to this manua...

Page 6: ...ISM est confomre a la norme NMB 001 du Canada This instrument complies with the WEEE Directive 2002 96 EC marking requirement This affixed product label indicates that you must not discard this electrical or electronic product in domestic household waste The CSA mark is a registered trademark of the Canadian Standards Association This symbol indicates the time period during which no hazardous or t...

Page 7: ... instrument is available on the Keysight Web site You can search for the DoC by its product model or description at the web address below http www keysight com go conformity If you are unable to search for the respective DoC please contact your local Keysight representative ...

Page 8: ...utline Diagram 1 10 Rack Mounting 1 10 INPUT POWER REQUIREMENTS 1 10 Power Cable 1 10 OPERATING INSTRUCTIONS 1 10 INTRODUCTION 1 10 CONTROLS 1 10 Line Switch 1 10 Voltage and Current Metering 1 10 Voltage Controls 1 10 TURN ON CHECKOUT PROCEDURE 1 11 OPERATION 1 11 Overload Protection Circuits 1 11 Operation Beyond Rated Output 1 11 Connecting Load 1 11 Series Operation 1 11 Parallel Operation 1 1...

Page 9: ...HOOTING A 5 ADJUSTMENT AND CALIBRATION A 5 COMPONENT LOCATOR DIAGRAMS A 7 MAIN BOARD TOP A 7 MAIN BOARD BOTTOM A 8 DISPLAY CONTROLLER TOP A 9 DISPLAY CONTROLLER BOTTOM A 10 7 SEGMENT TOP A 11 7 SEGMENT BOTTOM A 12 ...

Page 10: ...ply with the following safety and EMC Electromagnetic Compatibility requirements Safety IEC 61010 1 2010 EN 61010 1 2010 CAN CSA C22 2 No 61010 1 12 EMC IEC 61326 1 2005 EN61326 1 2006 CISPR11 2003 EN55011 2007 Canada ICES NMB 001 Issue 4 June 2006 Australia New Zealand AS NZS CISPR 11 2004 INSTRUMENT AND MANUAL IDENTIFICATION A serial number identifies your power supply The serial num ber encodes...

Page 11: ...OT During turn on or turn off of AC power output plus overshoot will not exceed 1 V if the output control is set for less than 1 V If the control is set for 1 V or higher there is no overshoot GENERAL SPECIFICATIONS AC INPUT 0EM 115 VAC 10 47 63 Hz 200 VA 130 W 0E9 100 VAC 10 47 63 Hz 200 VA 130 W 0E3 230 VAC 10 47 63 Hz 200 VA 130 W DIMENSIONS 212 3 mmW x 88 1 mmH x 345 4 mmD 8 4 inW x 3 5 inH x ...

Page 12: ...igure 1 Outline Diagram OPERATING INSTRUCTIONS INTRODUCTION This section describes the operating controls and indicators turn on checkout procedures and other operating consider ations for the Model E3620A Dual Output Power Supply 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...

Page 13: ...g 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 performa...

Page 14: ...load resistor so that the supply delivers current through the entire operating cycle of the load devices Figure 3 Reverse Current Loading Solution 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 wil...

Page 15: ...ion 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 1 b Check the rating of the installed fuse and replace it wit...

Page 16: ...t eliminates the need for connecting resistors or rheostats in parallel to handle the power and it is much more stable than a carbon pile load It is easier to switch between load conditions as required for the load regu lation and load transient response tests Output Current Measurement For accurate output current measurements a current sampling resistor should be inserted between the load and the...

Page 17: ...mV of the reading in step c e Repeat steps a through d for the V2 supply Figure A 5 Basic Test Setup Line Regulation Source Effect Definition The immediate change EOUT 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 s...

Page 18: ...tage 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 V1 supply as shown in Figure A 5 but replace the DVM with the oscilloscope Operate the electronic load in constant current mode b Turn on the supply and push the V1 METER switch in c Turn up V1 output voltage to 25 0 volts d...

Page 19: ...r 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 amp fuse and standard and Option OE9 use a slow blow 2 amp fuse ADJUSTMENT AND CALIBRATION Current Limit Adjustment To adjust the current limit circuit in the V1 or V2 supply pro ceed a...

Page 20: ...put voltage to 15 00 V and then adjust R81 on the main board until front panel VOLTS display reads exactly DVM value Ammeters To calibrate ammeter for V1 and V2 supplies proceed as follows a Connect the test setup shown in Figure A 4 to the output of the V1 supply Substitute a short for RL and leave load circuit switch open b Push V1 METER switch in and turn V1 VOLTAGE control fully clockwise c Cl...

Page 21: ...A 7 COMPONENT LOCATOR DIAGRAMS MAIN BOARD TOP ...

Page 22: ...A 8 MAIN BOARD BOTTOM ...

Page 23: ...A 9 DISPLAY CONTROLLER TOP ...

Page 24: ...A 10 DISPLAY CONTROLLER BOTTOM ...

Page 25: ...A 11 7 SEGMENT TOP ...

Page 26: ...A 12 7 SEGMENT BOTTOM ...

Page 27: ...547 2111 Japan tel 81 426 56 7832 fax 81 426 56 7840 Korea tel 080 769 0800 fax 080 769 0900 Latin America tel 305 269 7500 Taiwan tel 0800 047 866 fax 0800 286 331 Other Asia Pacific Countries tel 65 6375 8100 fax 65 6755 0042 Or visit the Keysight World Wide Web at www keysight com find assist Product specifications and descriptions in this document are subject to change without notice Always re...

Page 28: ...This information is subject to change without notice Keysight Technologies 2002 2014 Edition 11 November 2014 E3620 90001 E3620 90001 www keysight com ...

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