Agilent Technologies E3614A دليل المستخدم

دليل المستخدم للجهاز Agilent Technologies E3614A

جهاز: Agilent Technologies E3614A
فئة: مزود الطاقة
الصانع: Agilent Technologies
مقاس: 1.73 MB
مضاف: 12/30/2013
عدد الصفحات: 47
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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

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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. SAFETY SYMBOLS BEFORE APPLYING POWER. Verify that the product is set to

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Table of Contents SAFETY SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 SAFETY REQUIREMENTS. . . . . . . . . . . . . . . . . . .

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OPTIONS GENERAL INFORMATION Options 0EM, 0E3 and 0E9 determine which line voltage is selected at the factory. The standard unit is configured for 115 INTRODUCTION Vac ± 10%. For information about changing the line voltage This manual describes all models in the Agilent E361xA 60W setting, see paragraph "INPUT POWER REQUIREMENTS", Bench Power Supply family and unless stated otherwise, the page 1-6. information in this manual applies to all models. 0EM: Input power, 115 Vac ± 10%, 47-63 Hz 0E3: In

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be grounded or the power supply can be operated float- SPECIFICATIONS ing at up to a maximum of 240 Volts off ground. Total out- Detailed specifications for the power supply are given in Table put voltage to ground must not exceed 240 Vdc. 1. All specifications are at front terminals with a resistive load, and local sensing unless otherwise stated. Operating charac- LINE FUSE teristics provide useful, but non-warranted information in the Line Voltage Fuse Agilent Part No. form of the nominal pe

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Table 1. Specifications and Operating Characteristics (Cont’d) *REMOTE PROGRAMMING SPEED DC ISOLATION Maximum time required for output voltage to change from initial ± 240 Vdc maximum between either output terminal and earth value to within a tolerance band (0.1%) of the newly programmed ground including the output voltage. value following the onset of a step change in the programming input voltage. *COOLING: Convection cooling is employed. Full load No load Up: E3614A: 3 msec 2 msec *WEIGHT: 12

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e. Replace the cover and mark the supply clearly with a tag or 4. DISPLAY OVP/CC SET Switch: Pressing this switch causes label indicating the correct line voltage and fuse that is in the VOLTS display to show voltage setting for overvoltage use. shutdown (trip voltage) and the AMPS display to show the current control set value. Setting values are either front panel settings or remote voltage programmed settings. 5. OVP Adjust Screwdriver Control: While pressing the DIS- PLAY OVP/CC SET switch

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that the current limit value can be set from zero to maximum False OVP shutdowns may occur if you set the OVP shutdown rated value. 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 shutdowns from load-induced transients. OPERATING MODES The setting of the rear panel switch determines the operating Adjusting OVP. Follow this procedure to adjust the OVP shut- modes of the power supply. The local operat

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Output Noise. Any noise picked up on the sense leads will REMOTE OPERATING MODES appear at the supply's output voltage and may degrade CV load Remote operating modes discussed below are remote voltage regulation. Twist the sense leads to minimize the pickup of exter- sensing and remote voltage programming. You can set up the unit nal noise and run them parallel and close to the load leads. In for remote operating modes by changing the settings of the rear noisy environments, it may be necessary

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ply above 100% rated output. Limit your programming MULTIPLE-SUPPLY OPERATION voltage to 10 Vdc. Normal parallel and auto-parallel operation provides increased out- put current while normal series and auto-series provides increased Remote Programming Connections. Remote programming output voltage. Auto-tracking provides single control of output volt- requires changing settings of the switch and connecting external age of more than one supply. You can set up the unit for multiple- voltages to +

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Setting Voltage and Current. Turn the slave unit's CURRENT gramming according to the remote-programming instructions. control fully clockwise. Adjust the master unit's controls to set the desired output voltage and current. The master supply operates MASTER POWER SUPPLY in a completely normal fashion and may be set up for either con- _ _ _ MASTER LOCAL + + + stant voltage or constant current operation as required. Verify that the slave is in CV operation. For auto-parallel operation of two supp

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above the master unit's current setting to avoid having the slave AUTO-SERIES OPERATION switch to CC operation. Auto-series operation permits equal or proportional voltage sharing, and allows control of output voltage from one master When in CC operation the combined output current is the same unit. The voltage of the slaves is determined by the setting of as the master unit's current setting, and when in CV operation the the front panel VOLTAGE control on the master and voltage combined output

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Remote Sensing. To remote sense with auto-series operation, Remote Analog Programming. To simultaneously remote pro- set SENSE switch of the master unit and set SENSE switch of the gram both units' output voltages, set up only the master unit for slave unit to remote. remote voltage programming according to the remote program- ming instructions. To vary the fraction of the output voltage contri- Remote Analog Voltage Programming. To remote analog pro- bution by the slave unit, connect a variable

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a. The output impedance of the power supply decreases with LOAD CONSIDERATIONS increasing frequency. This section provides information on operating your supply with b. The recovery time of the output voltage is longer for load various types of loads connected to its output. resistance changes. c. A large surge current causing a high power dissipation in the PULSE LOADING load occurs when the load resistance is reduced rapidly. The power supply will automatically cross over from constant- volt

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SERVICE INFORMATION Figure A-1. Block Diagram The main secondary winding of the power transformer has PRINCIPLES OF OPERATION three sections (N1, N2, and N3), each of which has a different (Block Diagram Overview) turns ratio with respect to the primary winding. At the begin- ning of each half-cycle of the input ac, the control circuit Throughout this discussion, refer to both the block diagram of determines whether one pair, both or none of the SCR will be Figure A-1 and the schematic diagrams

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series pass transistors. Whenever the output voltage is below Full protection against any overload condition is inherent in the sloping V1 line, the control circuit inhibits four SCRs and the Constant Voltage/Constant Current design principle since the input capacitors charge to a voltage determined by N1. there is not any load condition that can cause an output which Figure A-2 indicates the windings that are connected as a lies outside the operating region. For either constant voltage result o

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a. Perform turn-on checkout procedure given in page 1-7. Electronic Load. The test and calibration procedures use an b. Perform the CV and CC Load Regulation perfor- electronic load to test the supply quickly and accurately. An mance tests given in the following paragraphs electronic load is considerably easier to use than load resis- respectively. 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

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Line Regulation (Source Effect) CONSTANT VOLTAGE (CV) TESTS Definition: Line regulation is the change in the steady state CV Setup. For all CV tests set the output current at full rated value of dc output voltage due to a change in ac input voltage output to assure CV operation. The onset of constant current from a minimum to a maximum value(±10% of nominal volt- can cause a drop in output voltage, increased ripple, and age). other performance changes not properly ascribed to the con- stant volt

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Figure A-5. Load Transient Response Time Waveform PARD(Ripple and Noise) Definition: PARD is the Periodic and Random Deviation of the dc output voltage from its average value, over a specified bandwidth and with all other parameters maintained constant. Constant voltage PARD is measured in the root-mean- square(rms) or peak-to-peak(pp) values over a 20 Hz to 20 MHz bandwidth. Fluctuations below the lower frequency limit are treated as drift. PARD(RMS) Measurement The rms measurement is not an id

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a. Connect the test equipment as shown in Figure A-7. CONSTANT CURRENT (CC) TESTS b. Turn the supply's power on and turn CURRENT con- CC Setup. Constant current tests are analogous to constant trol fully clockwise. voltage tests, with the supply's output short circuited and the c. Turn up output voltage to the full rated value. Check voltage set to full output to assure CC operation. For output that the supply's CV indicator remains lighted. current measurements the current monitoring resistor


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