Agilent Technologies E3616A, E3614A, E3617A, E3615A service manual Safety Summary

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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. Agilent Technologies assumes no liability for the customer's failure to comply with these requirements.

BEFORE APPLYING POWER.

SAFETY SYMBOLS

Verify that the product is set to match the available line voltage and that the correct fuse is installed.

GROUND THE INSTRUMENT.

This product is a Safety Class I instrument (provided with a pro- tective 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 poten- tial shock hazard that could result in personal injury. If the instru- ment is to be energized via an external autotransformer for voltage reduction, 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. Compo- nent replacement and internal adjustments must be made by qualified service personnel. Do not replace components with power cable connected. Under certain conditions, dangerous volt-

!

or

WARNING

CAUTION

Instruction manual symbol; the product will be marked with this symbol when it is neces- sary for the user to refer to the instruction manual.

Indicate earth(ground) terminal.

The WARNING sign denotes a hazard. It calls attention to a procedure, practice,

or the like, which, if not correctly performed or adhered to, could result inpersonal injury. Do not proceed beyond a WARNING sign until the indicated conditions 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 performed 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 conditions are fully understood and met.

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 resuscitation, is present.

The NOTE sign denotes important infor-

NOTE mation. It calls attention to a procedure, prac- tice, 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 modification 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.

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Contents Agilent E361xA 60W Bench Series DC Power Supplies AprilSafety Summary Operating Instructions General Information Temperature Coefficient Operating Temperature RangeMeter Programming Resolution Line FuseInput Power Requirements InstallationInstallation Data Initial InspectionOperating Instructions TURN-ON Checkout ProcedurePower Cord Operating Modes Local Operating ModeConnecting Loads Operation Beyond Rated OutputRemote Analog Voltage Programming Remote Operating ModesRemote Voltage Sensing AUTO-PARALLEL Operation MULTIPLE-SUPPLY OperationNormal Parallel Operation Normal Series Operation Gramming according to the remote-programming instructionsAUTO-SERIES Operation Total output voltage to ground must not exceed 240 VdcAUTO-TRACKING Operaton = slave output voltageLoad Considerations Service Information Operation Verification Tests MaintenanceTest Equipment Required Measurement Techniques Type Required Characteristics USE Recommended ModelPerformance Tests Line Regulation Source Effect Constant Voltage CV TestsLoad Regulation Load Effect Load Transient Response TimePARDPeak-to-Peak Measurement PARDRipple and NoisePardrms Measurement Constant Current CC Tests CV Drift StabilityAdjustment and Calibration Procedure CC Drift StabilityReference and Bias Circuit TroubleshootingOverall Troubleshooting Procedure Regulating Loop TroublesSymptom Checks and Probable Causes Overvoltage Protection Circuit TroublesStep Action Response Probable Cause Step Measure Response Probable Cause Replaceable Parts Table A-10. Replaceable Parts List Table A-10. Replaceable Parts List Contd R28,111 0698-3228 Resistor 49.9K +-1% .125W TF TC=0+-100 RESISTOR-VAR 10K +-10% ALL IC V RGLTR-FXD-POS 4.8/5.2V TO-220 PKG ALL DIODE-GEN PRP 180V 200MA DO-35 ALL Table A-11. Component Value Model Page Page Page Page Manual Supplement Constant Voltage Mode T EAlternative Voltage Programming Using Resistors Programming Voltage Common to the Minus OutputProgramming Voltage Common to the Minus Output Constant Current Mode Constant Current with Voltage ProgrammingCurrent Monitoring Remote Resistor Programming Connections Remote Resistor Programming, Constant VoltageRemote Resistor Programming, Constant Current Certification Declaration of Conformity