HP-6443-Manual-DC-PS 电路图.pdf

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1、DC POWER SUPPLY SCR-lP SERIES, MODEL 6443B SERIAL NUMBER PREFIX 6G OPERATING AND SERVICE MANUAL HEWLETT PACKARD HARRISON DIVISION RadioFans.CN 收音机爱 好者资料库 DC POWER SUPPLY SCR-lP SERIES, MODEL 6443B SERIAL NUMBER PREFIX 6G June, 1966 Stock No. 06443-90001 RadioFans.CN 收音机爱 好者资料库 HP Archive This vintag

2、e Hewlett Packard document was preserved and distributed by Please visit us on the web ! Prepared by on-line curator: Tony Gerbic For FREE Distribution Only * RadioFans.CN 收音机爱 好者资料库 Section I II III TABLE OF CONTENTS GENERAL INFORMATION 1-1. Description. 1-2 General . . 1-4. Overload Protection 1-7

3、. Cooling Title 1-9 Monitoring . . . 1-11. Output Terminals 1-13. Instrument Identification INSTALLATION . . . . 2-1. Initial Inspection . . . . 2-2. General . . . . 2-4. Mechanical Check . . 2-6. Electrical Check. . 2-8. Installation Data . . . . 2-9. General . . . . 2-11. Location . . . 2-13. Powe

4、r Requirements 2-15. Power Cable . . . . 2-18. Repackaging for Shipment. OPERATING INSTRUCTIONS. . 3-1. Controls and Indicators . . . . . . . . . . . . . . . . . . . 3-3. Operation . 3-4. General . . . . . . . 3-6. Normal . 3-10 . Connecting Load. 3-14. Remote Sensing . 3-17 . Remote Programming 3-2

5、6. Parallel . . . . . 3-30. Series . 3-35. Auto-Tracking . 3-38. Operating Considerations. 3-39. Pulse Loading . . . 3-41. Output Capacitance . . 3-44. Negative Voltage Loading 3-46. Negative Current Loading . i . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page . . 1-1 . . . 1-1 . 1

6、-1 . 1-1 . 1-1 . 1-1 . 1-1 . . . 1-2 . . . . . . 2-1 . . 2-1 . 2-1 . 2-1 . 2-1 . 2-1 . 2-1 . 2-1 . . 2- 2 . . 2-2 . 2-2 . 3-1 . 3-1 3-1 . 3-1 . 3-1 . 3-2 . . 3-2 . 3-3 . 3-5 . 3-5 . . . . . 3-6 3-7 . 3-7 . . . . . 3-7 . 3- 7 . . . . 3-7 Section IV v TABLE OF CONTENTS (cont. Title Page PRINCIPLES OF

7、OPERATION . . . . . . . . . . .4-1 4-1. Block Diagram Description . . . .4-1 4-9. Circuit Description . . . . . . . . . . . .4-2 4-10. AC Input. . . . . . . . . . . .4-2 4-12. DC Output . . . . . . . . . 4-2 4-14. Voltage Input . . . . . . . .4-2 4-20. Current Input . . . . . . . .4-3 4-24. Ga ting

8、Circuit . . . . .4-4 4-27. Turn-On Circuit. . . . . . . . . . .4-4 4-29. SCR Regulator Control . . . . . .4-4 4-37. SCR Regulator . . . . . . . . . . . . . . . . . . .4-6 4-42. Bias and Reference Circuit . . .4-6 MAINTENANCE . . . . . . 5-1 5-1. General . . . 5-1 5-3. Measurement Techniques . 5-1 5-

9、7. Performance Check . . . . . . 5-2 .5-2 5-8. General . . . . . . . . . . . 5-10. Rated Output and Meter Accuracy . 5-2 5-13. Line Regulation . . . . . . . . . .5-3 .5-4 5-16 Load Regula ti on. . . . . . . . 5-19. Ripple and Noise . . . . . 5-21. Transient Recovery Time . 5-23. Additional Specifica

10、tion Check 5-24. Temperature Coefficient . 5-2 7. Output Stability. . . . . . . . . 5-4 . . . . . . . . 5-5 .5-6 . . 5-6 .5-6 5-30. Remote Programming . . . . . . . . . . . . . 5-7 5-33. Output Impedance . . 5-35. Output Inductance. 5-3 7. Cover Removal . 5-3 9 Troubleshooting . . 5-40. General . .

11、5-42. Trouble Analysis 5-49. Repair and Replacement . 5-51. Adjustments and Calibrations. 5-52. General . . 5-54. Meter Zero. . 5-56. Voltmeter Tracking. . . . . .5-9 . . . . . . 5-9 . . . 5-10 .5-10 . 5-10 5-10 . 5-12 .5-14 . . . . . . . 5-14 . 5-14 . . 5-14 5-58., Ammeter Tracking . . . . 5-14 . 5

12、-15 . 5-15 . . 5-15 5-60. Constant Voltage Programming Cu.rrent 5-62. Zero Voltage Output . . 5-64. Constant Current Programming Current ii / Section VI 5-66. 5-68. 5-70. 5-72. TABLE OF CONTENTS (cont.) Title Zero Current Output . . . . . . . Bias and Reference Line Regulation Line Imbalance . . . .

13、 . . Constant Current Load Regulation . REPLACEABLE PARTS . . . . 6-1. Introduction . 6-4. Ordering Information. iii Page . . .5-16 . .5-16 .5-17 .5-18 . .6-1 .6-1 .6-1 - - Table 1-1. INPUT: RATED OUTPUT: LINE REGULATION: LOAD REGULATION: RIPPLE AND NOISE: OPERATING TEMPERATURE RANGE: STORAGE TEMPER

14、ATURE RANGE: TEMPERATURE COEFFICIENT: OUTPUT STABILITY: (after 30-minute warm-up) REMOTE PROGRAMMING: TYPICAL OUTPUT IMPEDANCE: OUTPUT INDUCTANCE: Specifications _105-125 vac, 57 to 63 cps, single phase, 6. 5 amperes, 400 watts max. Constant Voltage: 0 to 120 vdc. Constant Current: 0 to 2. 5 amperes

15、 de Constant Voltage: Less than 60 mv for 10 5-12 5 vac input change. Constant Current: Less than 25 ma for 105-I25 vac input change. Constant Voltage: Less than 120 mv for 0 to 2. 5 ampere load change. Constant Current: Less than 25 ma for 0 to 12 0 vdc load change. 240 mvrms Constant Voltage: 0. 0

16、5% plus 3 0 mv per degree centigrade. Constant Current: 8 ma per degree centigrade. Constant Voltage: O.I5% plus 90 mv for 8 hours at constant temperature. Constant Current: 25 ma for 8 hours at constant temperature. Constant Voltage: 300 ohms per volt .I% Constant Current: I 00 ohms per ampere Less

17、 than O. I ohm from de to o. 5 cps Less than 2. 0 ohm from 0. 5 cps to IOO cps Less than 5 ohm from 100 cps to Ike Less than 4. 0 ohm from Ike to IOO kc 2. 0 microhenry Table 1-1. Specifications (cont.) TRANSIENT RECOVERY TIME: SIZE AND WEIGHT: FINISH: ! .:.!.!,. ;1-:!: CJ ,:-i.N (f IC)l_flGI: -:1.

18、4 - e In constant voltage operation, less than 300 milliseconds is required for output voltage recovery to within 600 millivolts of the nominal output voltage following a load change equal to one half the maximum current rat,ing of the power supply. Nominal output voltage is defined as the mean betw

19、een the no-load and full-load voltages. The transient amplitude is less than 4. 0 volt per ampere for any load change between 20% and 100% of rated output current. (Excluding the initial spike of approximately 100 microseconds dura- tion which is significant only for load rise times faster than 0 .2

20、 ampere per micro- second.) Heioht Width 3-1/2 in. 19 in. Depth 17-1/2 in. Weight 31 lb. Light gray front panel with dark gray case. CJ - )- + - CUM0-1 . - e Figure 1-1. Model 64438 DC Power Supply SECTION I GENERAL INFORMATION l:l. DESCRIPTION 1-2. GENERAL 1-3. The H-Lab Model 6443A DC Power Supply

21、 (fig. 1-1) is a completely solid- state, compact, well-regulated, constant voltage/constant current de power supply suitable for either bench or relay rack operation. A three-wire five-foot power cord is provided. The output is continuously variable between 0 and 12.Qvdc, and be- tween 0 and 2. 5am

22、peres. Detailed specifications are given in table 1-1. 1-4. OVERLOAD PROTECTION 1-5. A crossover feature protects both power supply and load in constant voltage operation. Automatic crossover circuitry switches the power supply from constant voltage to constant current operation if the output curren

23、t exceeds a preset limit. This crossover circuitry also protects the load from overvoltage during constant current operation by automatically switching the power supply into constant voltage operation. The user can adjust the crossover point via the front panel controls (para. 3-8 and 3-9) 1-6. The

24、power supply is protected from reverse voltage (positive voltage applied to negative terminal) by a diode that shunts current across the output terminals when this condition exists. The ac input is fused. A double-pole on/off switch opens both power leads in the off position. 1-7. COOLING 1-8. Conve

25、ction cooling is used. No fan is required. The power supply has no moving parts (except meter movement). 1-9. MONITORING 1-10. Two front-panel meters are provided for monitoring output voltage and current. The voltmeter has .a 0 tol 2D volt range and the ammeter has a 0 to 3 ampere range. Each meter

26、 has a 2% accuracy at full scale. 1-11 OUTPUT TERMINALS 1-12. Output power is available via a terminal strip on the rear panel. The rear panel terminal strip also enables the power supply to be connected for different modes of operation (para. 3-3). The output terminals are isolated from the chassis

27、 1-1 and either the positive or the negative terminal may be connected to the chassis via a separate ground terminal located adjacent to the output terminals. The power supply is insulated to permit operation up to 3 00 vdc off ground. 1-13. INSTRUMENT IDENTIFICATION 1-14. Harrison Laboratories powe

28、r supplies are identified by a three-part designa- tion . The first part is the model number: the second part is the serial number; and the third part is the manufacturing code letter. This manual applies to all Model 6443A power supplies with the same manufacturing code letter given in the title pa

29、ge. Change sheets will be supplied with the manual to make it apply to Model 6443Apower supplies with different manufacturing code letters. 1-2 -./ SECTION II INSTALLATION 2-1. INITIAL INSPECTION 2-2. GENERAL 2-3. Before shipment, the power supply was inspected and found free of mechan- ical and ele

30、ctrical defects. If damage to the shipping carton is evident, ask that the carriers agent be present when the power supply is unpacked. As soon as the power supply is unpacked, inspect it for any damage that may have occurred in transit. Also check the cushioning material for signs of severe stress

31、(may be indication of internal damage). Save all packing materials until the inspection is completed. If damage is found, proceed as instructed in the Claim for Damage in Shipment notice on the back of the front cover of this manual. 2-4. MECHANICAL CHECK 2-5. Check that there are no broken knobs or

32、 connectors, that the external sur- face is not scratched or dented, that the meter faces are not damaged, and that all controls move freely. Any external damage may be an indication of internal damage. 2-6. ELECTRICAL CHECK 2-7. Check that the straps on the terminal strip at the rear of the power s

33、upply are secure and that the strapping pattern is in accord with figure 3-2. Check the electrical performance of the power supply as soon as possible after receipt. A performance check that is suitable for incoming inspection is given in paragraphs 5-7 through 5-22. 2-8. INSTALLATION DATA 2-9 . GEN

34、ERAL 2-10. The power supply is shipped ready for bench or relay rack (19 inch) operation. 2-11. LOCATION 2-12. Because the power supply is cooled by convection, there must be enough space along the sides and rear of the power supply to permit free flow of cooling air. The power supply should be loca

35、ted in an area where the ambient temperature does not exceed 50C. 2-1 2-13. POWER REQUIREMENTS 2-14. The power supply is operated from a 105 to 125 volt (115 volts nominal), 5 7 to 63 cps, single phase power source. At 115 volts, 60 cps, the full load re- quirement is 400 watts at 6 amperes. 2-15 PO

36、WER CABLE 2-16. To protect operating personnel, the National Electrical Manufacturers Association (NEMA) recommends that the instrument panel and cabinet be grounded. This instrument is equipped with a three-conductor power cable. The third conduct- or is the ground conductor and when the cable is p

37、lugged into an appropriate receptacle, the instrument is grounded. The offset pin on the power cable three- prong connector is the ground connection. 2-17. To preserve the protection feature when operating the instrument from a two- contact outlet, use a three-prong to two-prong adaptor and connect

38、the green lead on the adaptor to ground. 2-18. REPACKAGING FOR SHIPMENT 2-19. To insure safe shipment of the instrument, it is recommended that the pack- age designed for the instrument be used. The original packaging material is re- usable. If it is not available, contact your Hewlett-Packard field

39、 office for packing materials and information. A packing carton part number is included in the parts list. 2-20. Attach a tag to the instrument which specifies the owner, model number, full serial number, and service required, or a brief description of the trouble. 2-2 . - 0 0 (l!ilJ HARRISON 62 . A

40、 OC POWER SUPPLY HEWLETT. PACKARD o-. v o-uA 0 DD CAUTION 31WPAX + LINE $ $ I. TURN AC POWER ON. rVOLTAGE-, COARSE FINE 2 ADJUST COARSE AND FINE VOLTAGE CONTROLS UNTIL Tl-E ()LTAGE ON THE OUTPUT VCX.TAGE METER IS OF DESIRED VALUE. 3. SHORT CIRCUIT THE OUTPUT TERMINALS (AT REAR OF POWER SUPPLY) r cUR

41、RENT-, COARSE FINE 0 0 0 GNO 4. ADJUST COARSE AND FINE CURRENT CONTROLS UNTIL THE CURRENT ON THE OUTPUT CURRENT METER IS OF DESIRED ALUE. 5. REMOVE SHORT AND CONNECT LOAD. OPERATING PROCEDURE FIG 3-1 0 0 SECTION III OPERATING INSTRUCTIONS 3-1 . CONTROLS AND INDICATORS 3-2. The controls and indicator

42、s are illustrated in figure 3-1. 3-3 OPERATION 3-4 GENERAL 3-5. The power supply is designed so that its mode of operation can be selected by making strapping connections between particular terminals on the terminal strip at the rear of the power supply. The terminal designations are stenciled in wh

43、ite on the power supply and are adjacent to their respective terminals. The strapping patterns illustrated in this section show neither terminal grounded. The operator can ground either terminal or operate the power supply up to 3 00 vdc off ground (floating) 3-6. NORMAL 3-7. GENERAL. The power supp

44、ly is normally shipped with its rear terminal strapping connections arranged for constant voltage/constant current, local sens- ing, local programming, single unit mode of operation. This strapping pattern is illustrated in figure 3- 2. The operator selects either a constant voltage or a constant cu

45、rrent output using the front panel controls (local programming, no strap- ping changes are necessary) 3-8. CONSTANT VOLTAGE. To select a constant voltage output, proceed as follows:. a. Turn-on power supply and adjust VOLTAGE controls for desired output voltage (output terminals open). b . Short out

46、put terminals and adjust CURRENT controls for maximum output current allowable (current limit), as determined by load conditions. If a load change causes the current limit to be exceeded, the power supply will automatically cross- over to constant current output at the preset current limit and the o

47、utput voltage will drop proportionately. In stting the current limit, allowance must be made for high peak currents which can cause unwanted cross-over (refer to para. 3-40). 3-9. CONSTANT CURRENT. To select a constant current output, proceed as follows: a. Short output terminals and adjust CURRENT

48、controls for desired output current. 3-1 b. Open output terminals and adjust VOLTAGE controls for maximum output voltage allowable (voltage limit), as determined by load conditions. If a load change causes the voltage limit to be exceeded, the power supply will automatical- ly crossover to constant voltage output at the preset voltage limit and the output current will drop proportionately. In setting the voltage limit, allowance must be made