Page 2 - Warranty Information; CERTIFICATION; LIMITATION OF WARRANTY
2 Warranty Information 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 NationalBureau of Standards, to the ...
Page 3 - Safety Summary; WARNING; Caution
3 Safety Summary The following general safety precautions must be observed during all phases of operation 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 instrume...
Page 6 - Table of Contents; INTRODUCTION
6 Table of Contents Warranty Information 2 Safety Summary 3 Notice 4 Printing History 5 Instrument Identification 5 Table of Contents 6 INTRODUCTION 9 Organization 9 Safety Considerations 9 Related Documents 9 Revisions 10 Manual Revisions 10 Firmware Revisions 10 Electrostatic Discharge 10 VERIFICA...
Page 9 - Introduction; Organization; Related Documents
9 1 Introduction Organization This manual contains information for troubleshooting and repairing to the component level the Agilent Model66332A Dynamic Measurement DC Source and the Agilent Model 6632B, 6633B, 6634B System DC PowerSupplies. Hereafter all models will be referred to as the dc power su...
Page 10 - Revisions; Manual Revisions; Electrostatic Discharge
1 - Introduction 10 Revisions Manual Revisions This manual was written for dc power supplies that have the same manufacturing dates (the first four digits) as thoselisted on the title page and whose unique identification number (the last four digits) are equal to or higher than thoselisted in the ti...
Page 11 - Verification and Performance Tests; Test Equipment Required
11 2 Verification and Performance Tests Introduction This document contains test procedures to verify that the dc power supply is operating normally and is withinpublished specifications. There are three types of tests as follows: Built-in Self Tests These tests, run automatically when the power sup...
Page 12 - - Verification and Performance Tests; Measurement Techniques; Test Setup
2 - Verification and Performance Tests 12 Resistor(substitute for electronicload if load is too noisyfor CC PARD test) 1 ohm, 50 W3 ohm, 100 W (Agilent 66332A/6632B)24 ohm, 100 W (Agilent 6633B)99 ohm, 100 W (Agilent 6634B)1k ohm, 5%, 3W (all models) Ohmite L50J1R0Ohmite RLS5R0 (adjustable)Ohmite RL...
Page 13 - Verification and Performance Tests - 2; Electronic Load; Operation Verification Tests; Performance Tests; Programming
Verification and Performance Tests - 2 13 Electronic Load Many of the test procedures require the use of a variable load capable of dissipating the required power. If a variableresistor is used, switches should be used to either; connect, disconnect, or short the load resistor. For most tests, anele...
Page 14 - CV Setup
2 - Verification and Performance Tests 14 Table 2-2. Programming Ratings Model Voltage Rating Full Scale Rating Current Rating Full Scale Rating Agilent66332A/6632BAgilent 6633BAgilent 6634B 20 V50 V 100 V 20.020 V50.045 V 100.1 V 5 A2 A1 A 5.0045 A 2.002 A1.001 A Constant Voltage (CV) Tests CV Setu...
Page 15 - CV Source Effect
Verification and Performance Tests - 2 15 e. Open the load and again record the DVM voltage reading. The difference between the DVM readings in steps(d) and (e) is the load effect voltage, and should not exceed the value listed in the performance test record chartfor the appropriate model under CV L...
Page 16 - Transient Recovery Time; CC Setup
2 - Verification and Performance Tests 16 Transient Recovery Time This test measures the time for the output voltage to recover to within the specified value following a 50% change inthe load current. tttt t v LoadingTransient Unloading T r a n s i e n t v t Figure 2-2. Transient Waveform a. Turn of...
Page 17 - Low Range Current Readback Accuracy; CC Load and Line Regulation
Verification and Performance Tests - 2 17 e. Divide the voltage drop (DVM reading) across the current monitoring resistor by its resistance to convert toamps and record this value (Iout). Also, record the current reading that appears on the front panel display. Thereadings should be within the limit...
Page 18 - CC Load Effect; CC Source Effect
2 - Verification and Performance Tests 18 c. Set up voltmeter to take measurements in the statistical mode as follows:Press Shift key, f0, Shift key, NPress ^ (up arrow) until MATH function is selected, then press >.Press ^ (up arrow until STAT function is selected then press (ENTER). d. Set up v...
Page 19 - Performance Test Equipment Form
Verification and Performance Tests - 2 19 CC Noise (PARD) Periodic and random deviations (PARD) in the output combine to produce a residual ac current, as well, as an acvoltage superimposed on the dc output. Constant current (CC) PARD is specified as the rms output current in afrequency range 20 Hz ...
Page 20 - Performance Test Record Forms
2 - Verification and Performance Tests 20 Performance Test Record Forms Model Agilent 66332A ORAgilent6632B Report No _______________ Date __________________ Test Description Minimum Specs. Results* Maximum Specs. Measurement Uncertainty Constant Voltage Tests Voltage Programming and Readback Low Vo...
Page 23 - Troubleshooting
23 3 Troubleshooting Introduction WARNING: SHOCK HAZARD. Most of the troubleshooting procedures given in this chapter are performed with power applied and protective covers removed. Such maintenance should be performed onlyby service trained personnel who are aware of the hazards (for example, fire ...
Page 24 - Overall Troubleshooting; Flow Charts
3 - Troubleshooting 24 Test Equipment Required Table 3-1 lists the test equipment required to troubleshoot the power supply. Recommended models are listed. Table 3-1. Test Equipment Required for Troubleshooting Type Purpose Recommended Model GPIB Controller To communicate with the supply via theGPIB...
Page 37 - Specific Troubleshooting Procedures
Troubleshooting - 3 37 Specific Troubleshooting Procedures Power-on Self-test Failures The power-on self-test sequence tests most of the digital and DAC circuits. If the supply fails self-test, the display"ERR" annunciator will come on. You can then query the unit to find out what the error(...
Page 39 - J307 Voltage Measurements
Troubleshooting - 3 39 J307 Voltage Measurements J307 connects the A1 Main Board Assembly to the A2 Interface Assembly. Table 3-4 provides a quick method ofdetermining if the voltages between these assemblies are within the normal range. If any of these voltages is outsidethe normal range, refer to ...
Page 41 - Post-repair Calibration; Inhibit Calibration Switch; Calibration Password
Troubleshooting - 3 41 Post-repair Calibration Calibration is required annually and whenever certain components are replaced. If components in any of the circuitslisted below are replaced, the supply must be re-calibrated as described in Appendix B of the User's Guide. a. A1 Control Board: Voltage o...
Page 42 - Initialization; ROM Upgrade; Identifying the Firmware; Upgrade Procedure
3 - Troubleshooting 42 Initialization The dc power supply's GPIB address and model number as well as other constants which are required to programand calibrate the supply are stored in a EEPROM on the A2 Interface board. The Interface board also containsreferences and other components that will affe...
Page 43 - Disassembly Procedures; List of Required Tools
Troubleshooting - 3 43 Disassembly Procedures The following paragraphs provide instructions on how to disassemble various components of the dc power supply.Once disassembled, the components can be reassembled by performing the disassembly instructions in reverseorder. Figure 3-2 shows the location o...
Page 44 - Front Panel Assembly, Removal and Replacement
3 - Troubleshooting 44 Cover, Removal and Replacement a. Using a 2TP Pozi screwdriver, unscrew the two screws that hold the carrying straps to the power supply, andthen remove the two screws from the opposite side of the case. b. To remove the cover, first spread the bottom rear of the cover slightl...
Page 45 - S1 Line Switch, Removal and Replacement; A3 Front Panel Board, Removal and Replacement; A1 Main Control Board
Troubleshooting - 3 45 S1 Line Switch, Removal and Replacement a. First remove the front panel assembly as described under “Front Panel Assembly, Removal and Replacement.” b. Release the switch from the front panel by pressing the locking tabs inward against the body of the switch and pushing the sw...
Page 46 - Line Voltage Wiring
3 - Troubleshooting 46 Line Voltage Wiring Figure 3-3 illustrates the primary wiring configuration of the power transformer for various ac line voltages. Uselong nose pliers to disconnect the wires going to the transformer terminals. NOTE: Install the correct fuse when changing the ac line voltage f...
Page 47 - Principles of Operation
47 4 Principles of Operation Introduction This section describes the different functional circuits used in the dc power supply models covered in this manual.First, the I/O external signals that connect to the Agilent power supply are described. Next, the overall blockdiagrams for the dc power supply...
Page 48 - - Principles of Operation; A3 Front Panel Circuits; Primary Interface
4 - Principles of Operation 48 A3 Front Panel Circuits As shown in Figure 4-1, the supply's front panel assembly contains a circuit board, a keypad, a liquid crystal display(LCD), and a rotary control (RPG) for the output voltage and current. With the exception of the RPG (A3G1), theA3 Front Panel b...
Page 49 - Principles of Operation - 4
Principles of Operation - 4 49 Figure 4-1. A2/A3 Block Diagram
Page 50 - A1 Main Board Circuits; Power Circuits
4 - Principles of Operation 50 The EEPROM (electrically erasable programmable read-only memory) chip on the A2 interface board stores avariety of data and configuration information. This information includes calibration constants, GPIB address,present programming language, and model-dependent data, ...
Page 52 - Control Circuits
4 - Principles of Operation 52 Two current shunt resistors monitor the output current. RmHi (R473) monitors the high current range; RmLo (R403)monitors the low current range. Shunt clamps, connected in parallel across RmLo, turn on at approximately 25 mA tolimit the voltage drop at high currents. Th...
Page 55 - Replaceable Parts List
55 5 Replaceable Parts List Introduction This section lists the replaceable parts for Agilent Models 66332A, 6632B, 6633B, and 6634Bpower supplies. Refer to Figures 5-1 for the location of mechanical parts with the referencedesignators MP. Refer to the board location diagrams in Chapter 6 for the lo...
Page 56 - - Replaceable Parts
5 - Replaceable Parts 56 Table 5-2. Chassis, Mechanical Designator Model Part Number Qty Description MP1 All 06612-00002 1 Chassis MP2 All 5063-3426 1 Front Panel Assy, Std unit MP2 All 5063-3443 1 Front Panel Assy, Option 020 MP3 All 0370-3238 1 Knob, 6mm MP4 All 06612-40001 1 Keypad MP5 All 1510-0...
Page 57 - Replaceable Parts - 5
Replaceable Parts - 5 57 Figure 5-1. Mechanical Parts ldentification
Page 71 - Diagrams; General Schematic Notes
71 6 Diagrams Introduction This chapter contains drawings and diagrams for troubleshooting and maintaining the Agilent Model 66332ADynamic Measurement DC Source and the Agilent Model 66332A/6632B/6633B/6634B System DC PowerSupplies. Unless otherwise specified in the drawings, a drawing or diagram ap...
Page 81 - Index
81 Index —+— +OUT, 47+sense, 47 —A— A1 board removal, 45A1 Main board, 50A2 board removal, 44A2 Interface Board, 48 A2S201 , 50 A3 board removal, 45A3 Front Panel, 48ADC, 48 —B— bias voltages, 38, 39 —C— cal denied, 41calibration, 41calibration - post repair, 41CC, 38CC line regulation, 17CC load ef...
