HP-425A-Brochure 电路图.pdf

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1、RadioFans.CN 收音机爱 好者资料库 New -hp- 4 2 5 A MicrovoIt-Ammeter now makes these difficult measurements quickly -and easily! _ ENGINEERING PHYSICS, CHEMISTRY MEDICINE, BIOLOGY Minute dc potentials, difference voltages, nulls Resistances from milliohms to 10 megmegohms* Thermocouple potentials Voltages in

2、plants, seeds Use with Esterline-Angus, other recorders Grid, photomultiplier currents Ionization levels in vacuum Voltages in living cells Nerve voltages Voltaic currents in chemicals with external dc source. Ad No. 4882-Prepared by L. C. C Electronics; Proceedings of the IRE; RadioFans.CN 收音机爱 好者资

3、料库 The all-new -hp- 425A Microvolt-Ammeter will provide engineers, physicists, chemists and physiological scientists with one compact, direct-reading instrument measuring minute voltages and currents with speed, sim- plicity and 10 times the sensitivity of the complex equip- ment arrays previously r

4、equired. Very careful engineering, including heavy filtering against ac signals and substitution of a unique photoelectric chop- per for the conventional mechanical vibrator, has resulted in performance heretofore unobtainable. The long-term drift of the 425A is less than 2pv and internal noise is l

5、ess than 0.2 pv. Conservative electrically, Model 425A includes every con- ceivable assurance of safety, accuracy and dependability. For example, momentary overloads of 1,000 volts cause no damage; and the new pickup probe is specially designed to minimize thermocouple and triboelectric effects. The

6、 meter provides constant polarity indication. The new -hp- 425A also may be used to measure a wide range of resistances. Milliohms may be measured by using a battery and series resistor as a constant current source. Higher resistances may be measured with higher voltages ; a 100 volt supply allows t

7、he 425A to measure accurately up to 10 megmegohms. Call your -hp- representative now for demonstration on your bench; or, write for details. HEWLETT- PACKARD COMPANY 4882A PAGE MILL ROAD PAL0 ALTO, CALIFORNIA, U.S.A. Cable HEWPACK DAvenport 5-4451 FIELD REPRESENTATIVES IN ALL PRINCIPAL AREAS S P E C

8、 I F I CAT I 0 N S MICROVOLT-AMMETER A Voltage Range: Current Range: Input Impedance: Accuracy: AMPLIFIER Frequency Range: Gain: Positive and negative voltages from 10 pv full scale to 1 v full scale in an eleven step, 1, 3, 10 sequence. Output: Output Impedance: 10 ohms, shunted by 1000 ohm potenti

9、ometer. 0 to 1 v for full scale reading, adjustable. Positive and negative currents from 10 ppa full scale to 3 ma full scale in an eighteen step, 1-3-10 sequence. Noise: Drift: Less than 0.2 Bv rms referred to input. After 15 minute warm-up, less than f2 pv per hour referred to the input. Voltage R

10、anges: 1 megohm *5%. Current Ranges: Depends on range, 1 megohm to 0.33 ohm. Within *3% of full scale. Power: Dimensions: 115 v f10 v, 230 *20 v, 60 cps, 40 watts. Cabinet Mount: 7/, wide, 111L high, 14 Weight: deep. Net 20 Ibs. dc to 0.2 cps. 100,000 maximum. Dolo subject to change without notice.

11、Prices f.0.b. factory. Price: $500.00. -hp- 425AR (rack mount) $505.00, -hp- 425A (cabinet) $500.00. e ILE COMPANY, 1NC.-Advertising lectronic Design; Control Engineering Y . i RadioFans.CN 收音机爱 好者资料库 In 1957, -hp- occupied the first two of six 85,000 square-foot buildings forming a com- plete new l

12、aboratory and manufacturing plant. New facility is approximately one mile west of previous plant on a 40-acre site just south of Stanford University. Your visit i s invited. c EETE Wont you agree it is simple and more time-saving when you can turn to one source for your test equipment needs? -hp- en

13、gineers are continually working to produce new equipment that anticipates your future needs, yet functions smoothly with your existing -bp- instruments. At the 1958 I.R.E. Show 20 new, basic -hp- test instruments were in- troduced. Today, -hp- makes over 300 instruments; you can choose from the worl

14、ds largest and most complete line just the equipment you need. In making this choice, JOLI are assured of -hp- quality; today the standard of the world in electronic test instruments. To give you personal help with measuring problems, you have available over 150 electronics specialists in every majo

15、r U. S. metropolitan area, and around the world. These men, trained and annually re-trained by -hp-, are experts in applying as well as selling and servicing - 1 3 - instruments. Call them when you can use personal, com- petent help, in your plant, today. Albuquerque, New Mexico Neely Enterprises 10

16、7 Washington St., S. E. ALpine 5-5586 Asbury Park, New Jersey I. E. Robinson Company 905 Main Street KEllog 1-3150 Atlanta 5. Georgia Bivins & Caldwell, Inc. 3133 Maple Drive, N. E. CEdar 3-7522 Baltimore 15. Maryland Horman Associates, Inc. 3006 West Cold Spring Lane Mohawk 4-8345 Boston Area Burli

17、ngton, Massachusetts Yewell Associates, Inc. Middlesex Turnpike BRowning 2-9000 Bridgeport 8. Connecticut Yewell Associates, Inc. 1101 East Main Street Forest 6-3456 Camp Hill, Pennsylvania I. E. Robinson Company 2120 Market Street REgent 7-6791 Chicago 45, Illinois Crossley Associates, Inc. 2711 We

18、st Howard Street SHeldrake 3-8500 Sales and Service Representatives in the United States and Canada Cleveland 24, Ohio S. Sterling Com an 5827 Mayfield goad HIllcrest 2-8080 Dallas 9, Texas Earl Lipscomb Associates P. 0. Box 7084 FLeetwood 7-1881 and EDison 2-6667 Dayton 19. Ohio Crossley Associates

19、, Inc. 2801 Far Hills Avenue Axminster 9-3594 Denver 10. Colorado Lahana & Company 1886 South Broadway PEarl 3-3791 Detroit 35, Michigan S. Sterling Com any 15310 West McNicl!ols Rd. BRoadway 3-2900 Englewood, New Jersey R. M. C. Associates 391 Grand Avenue Lowell 7-3933 Fort Myers, Florida Arthur L

20、ynch & Associates 35 West North Shore Avenue Wyandotte 5-2151 High Point, North Carolina Bivins & Caldwell, Inc. 1923 N. Main Street Tel.: 2-6873 Copyright 1918 Hewlett-Packard Company Houston 5. Texas Earl Lipscomb Associates P. 0. Box 6573 JAckson 4-9303 Huntsville, Alabama Bivins & Caldwell, Ioc.

21、 JEfferson 2-5733 (Direct line to Atlanta) Indianapolis 20, Indiana Crossley Associates, Inc. 5320 NO. College Avenue CLifford 1-9255 Kansas City 30. Missouri Harris-Hanson Company 7916 Paseo Blvd. HIlland 4-9494 Las Cruces. New Mexico Neely Enterprises 126 S. Water Street JAckson 6-2486 Los Angeles

22、. California Neely Enterprises 3939 Lankershim Blvd. North Hollywood, Calif. STanley 7-0721 New York 21, New York R. M. C. Associates 236 East 75th Street TRafalgar 9-2023 Philadelphia Area Upper Darby, Pennsylvania I. E. Robinson Company 7404 West Chester Pike SHerwood 8-1294 Phoenix, Arizona Neely

23、 Enterprises 641 East Missouri CRestwood 4-5431 Pittsburgh 22. Pennsylvania S. Sterling Company Room 815, Park Bldg. 355 Fifth Avenue ATlantic 1-9248 Portland 9. Oregon ARVA 1238 N. W. Glisan , CApitol 7-1281 Rochester 10. New York Edward A. Ossmann & Associates 830 Linden Avenue LUdlow 6-4940 Sacra

24、mento 14. Calitornia Neely Enterprises 1317 - 15th Street GIlbert 2-8901 San Diego 6, California Neely Enterprises 1055 Shafter Street Academy 3-8106 San Francisco Area San Carlos, California Neely Enterprises 501 Laurel Street LYtell 1-2626 Seattle 99, Washington ARVA 120 West Thomas Street ATwater

25、 4-7337 St. Louis 17. Missouri Harris-Hanson Company 2814 South Brentwood Boulevard MIssion 7-4350 St. Paul 14. Minnesota Crossley Associates, Inc. 842 Raymond Avenue MIdway 6-7881 Toronto 10. Ontario Atlas Instrument Corporation, Ltd. 50 Wingold Avenue Tucson, Arizona Neely Enterprises 232 So. Tucs

26、on Blvd. MAin 3-2564 Vancouver 2. British Columbia Atlas Instrument Corporation, Ltd. 106-525 Seymour Street Mutual 3-5848 Washington, D. C. Area Rockville, Maryland Horman Associates, Inc. 941 Rollins Ave HAzelwood 7-7560 Winnipeg, Manitoba Atlas Instrument Corporation, Ltd. 72 Princess Street WHitehall 3-8707 RUssell 1-6174 _ Registered Trademark of the Hewlett-Packard Company B , s. A , PRINTED IN U. 5. A. 7-58 - 68M. 4882