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HEWLE"WPACKARD CE RTI FI CATI tII O The Hewlett-Paclnrd Company certifins that this instrammt was thoroughly tested, ond. inspected and pu,blished to meet its fourd specifications whm it was shipped the The Hewlett- lrom factorU. Paclard Com,pany certifies tlmt its calibration rneo$re- further m,mts are traceable to the U.S. Natiornl Bureau of Standards to tlrc ertmt allowed by the Brneau's calibration facility. WARRA]TTY ATD ASSISTAITCE products All Hewlett-Packard are warrante
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v OPERATING AITD SERYICE MAIIUAI Manual Part No. 03490-90014 Microfiche Part No. 03490-90064 MODEL 3490A M U tTIM ETE R The main body of this manual applies to Serial Prefix 1211A !;:,' .: ;.t; : -: :i; '. Any changes made in instruments manufactured after this !:.. " "Manual :::: printing will be found in a Changes" supplement supplied with this manual. Be sure . to examine this supplement, if one exists for this manual, for any changes which apply to your instrument and record t
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Table of Contents Model3490A CONTENTS TABLE OF Page Section III (cont'd) Page Section Autoranging ........3-3 ......I-1 3-34. I. GENERALINFORMATION... ...1-l 3-36. ManualTrigger ......3-3 Introduction l-1. .'-.l-l 3-38. Self-TestOperation ....3-3 .... l-5. Specifications 340. DCVoltageMeasurements ........... 3-3 -......1-1 l-8. Options DC Rate and ...1-l 342. Sample AccessoriesSupplied l-10. ....34 ...1-1 ResponseTime. AccessoriesAvailable l-12. 344. Input Resistance .. . .. .. ..
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Table of Contents Model 34904 (Gont'd) TABLE 0F C0NTENTS Section Page (cont'd) page Section IV IV. THEORYOFOPERATION . ........4-I 4-130. PowerSupplies ... ...4-15 4-1. Introduction ...4-l 4-132. Self-TestFunction ....4-16 4-3. General Theory of Operation . . .4-l 4-134. LogicTest,No. I . ..+16 4-5. Signal Conditioning Circuits . . . . . . . . 4-l +137. lOVRangeZero,TestNo. 2 . ..... +17 4-7. ReferenceVoltages ...4-l 4-139. TurnoverError, TestNo. 3 . ....... 4-17 4-9. DC Amplifi
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Model3490A Table of Contents rABLE (Cont,d) OF CONTENTS V (cont'd) Page Section Section page VII. TROUBLESHOOTING Method AND 5-18. Ätemate . . ... .5-2 CIRCUITDIAGRAMS 5-2O-D0Common-ModeRejectionTest ......5-2 .......7-l 7-1. Introduction 5-22. A9Common-ModeRejectionTest ......54 ...7-l 7-3. Preliminary Troubleshooting 5-24- AC Normal-Mode Rejection Test .. ......54 ... ... . . .7-l 7'5. TroubleshootingTrees 5-26. DcVoltmeterlnput ........7-l 7-7- Access for Servicing Resistance Test
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Table of Contents Model 34904 LIST OF ILLUSTBATIONS Figure Page Figure Page 2-1 . Line Voltage Selection . . .2-l 4-23. Waveforms Illustrating 2-2. PowerCordConfigurations .... .......2-l Acquire/HoldMode. ......4-22 2-3. Model3490ADimensions ......2-2 4-24. Simplified Diagram and 24. Installation of Isolated BCD Output Operationof .. S/HCircuit A.. ....4-23 and Remote Options . . .. . .. .2-3 4-25. Simplified Diagram of S/H Circuit B . . . . .. .. .4-24 2-5. Data OutputConnections, Option 0
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Model3490A Table ofContents LIST 0F tLLUSTRAT|0NS (Cont,d) Figure Page Figure 7-22. Schematic Diagram, Reference and Page 7-i+. schematic Diagram, Ratio Circuits, sample/Hold Al, Al3 7431:144 AnalosCircuits, 7-24. Schematic Diagram, A27' Main ....... Logic, Al . . . . .745;1746 .7_671j_6g 7-35. Schematiö Diagram, 7-23. Schematic Diagram, Sample/Hold Clock LogicCircuit:,12S... andCounters,Al .. . .. ...7_6917_70 ...7_47174g 7-36. Block Dagram, 3490A 7-25. Schematic Diag
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34904 Model Section I sEcTt0N I GENERAT INFORMATION lNTBoDucTl0N. Option 040 or 045: 1.1. Sample-and-Hold Option 050: 34904 designed for operation on 50 Hz 3490A Multimeter makes ac voltage, The Model dc power source l-2. measurements with 5-digit and resistance resolu- Option 060: voltage, 3490A desigred for operation on 60 Hz of overrange measurements It is capable up to power tion. source of range on all except the 1000V ac and dc l2O% Option 080: Ratio Polarity selection and displa
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Section I Model 3490A most -hp of the 3490A logic IC's for use with the 1.14. INSTBUMENT AND IDENTIFICA- MANUAL lO529A Logic Comparator. Using these boards with the TION. Logic Comparator, a faulty IC can be isolated in seconds without removing it from the circuit. A spare parts set, l-1 5. Instrument identification by serial number is -hp- 11127A, is available for the 3490A. This set located on the rear panel. Hewlett-Packard uses a contains the most critical components of the 3490A
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Model 3490A Section I Table 1-1 . Specifications. DC VOLTAGE Temperature Coefficient C to l0o 50P Cl: r (0.002 % of Display: . Full-Rangp reading + 0.001 % r of range)F 10O.oOo C :1P9P.Y v . rooo.öö v Voltage Coefficient (1000V i I;IBBBB V range): Add ppm 0.01 per Volt/ kHz to % of reading Overrange: 2O % onall ranges except 1000 V range t Aeuracy: l% of reading + To of rangel Input lmpedance: .1 V Range 1V-f00{,VRangas 2 Mf, t 1 %shunted by: ( 65 pF without rear input
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Model 34904 Section I (Cont'd). 1-1. Specifications Table (Option RATIO 0801 / Ranges: External Reference Input Configuration: Ratio Measurement 1V:1O.1 Vtot1.2V is conlmon with Input Low. External Reference Low 3 wire; 10V: tlVto112V positive or negative with High may be External Reference if the Ext- Ref' for greater accuracy should be used {1 V range respect to Low. nput I V. is between 1 V and 1.2 voltage = Ratio Ext. Ref. Input Ranges: V to 1000 V DC: o.1 Resistance: > 107O
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Model34904 Section I Table 1-1. (Cont,d.) Specifications (OPtion 040/0451 SAMPLE/HOLD Full-range Display: Sample/Hold Measurement (DC Accuracy function, I V through 1ü)0 V ranges!: (% oÄ t of reading + oI rcngel r 1.00fi) v (23o 24 hours c r 10 c) r +0.0151 {0.01 + v Sample/Hold measurement 10.q)0 displar/ is 4 full (23o 30.days c r so c) (0.01 r + 0.015) "1 ", plus ! V digits overrange 100.00 (23o 90 days c r c) (O.01 so r + 0.015) r 1000.0 v 6 months (239 C r (0.02 So
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Model 34904 I Section (Cont'd.) Table 1-2. General lnformation dVs/u (CONT'DI HOLD SAMPLE of signal as measured in increments Slope that the waveform between small enough Sample/Hold AC Characteristics: points or achieves measurement approaches linearitV. Maximum rate of change of input voltage to maintain = typical factor for each Velocity factor. The K1 tracking: is as follows, range 2.5 % of range/ps on the 10 V and 1 0OO V ranges. 5 % of range/prs on the 1 V and 10O V ranges. Facto
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Model3490A Section II SECTION tl INSTATI.ATION AN D INTERFACE CTloN. 2.r. |NTR0Dt IOOV--r r- 20v-l I r-r 2-2. This section contains information and instructions ilil installing and interfacing necessary for the Model 3490A Lzqov----l I ' \-22OV Included Multimeter. are initial inspection procedures, grounding power and requirements, environmental infor- IOO Volts mation, installation instructions, interconnection pro- l@V- r- cedures, and instructions for repackaging for shipment. rzov
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II Model 3490A Section 2.16. INSTALLATION. c. Install 03490-60306 Isolated BCD Module in the right opening in the instrument guard using screws 2-17. Bench Use. provided (see Figure 2-4). 2-18. The Model 3490A is shipped with plastic feet and d. If Isolated Remote (lll22L) is not installed at tilt stand in place, ready for use as a bench instrument. this time, install cover plate 03490-04117 over the left The the instrument front of may be elevated for in the guard. opening If Isolated Remo
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Section Il Model3490A (F OUTGUARD REMOTE I 03490- 665t2 A8J IO aa,rs 03490-66510 I - - cABLE w7 / l<- . f--- REMOTE ISOLATED BCD MODULE TSoLATED : | - MOOULE 03490- 60308 05490 60306 r-l rffi l_J I | -J- --\ I' W4 I ;+CABLE i ___/ . rY6 ;<-caBLE t\ - E TNGUARD BcD JJiJV-99JWt AI.J8 03490-56511 AIJ 7 f-1 -_ Figure 24. Installation of lsolated BCD Output and Remote Options. W7 between this assembly and the outguard side of the range, function, polarity and overload information
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Section II Model34904 -s t** i 3i {JrJ ü,1t; 7N TA OUTPUT COTruECTOR .IO oPTtoN 021 ,^j -8 : äF cö Mating Connector: i: ^j3 -hp- 6s Part No. Ed 1251€086 z9 =:== ä Amphenol No. 57-30500-378 8885 996< qi :! z ;9eFe22 ?ä;-;03":' Y 3 EKBö ? laEFä=; iää g ; 5 LOGIC LEVELS DATA FLAG (Print Command Outputl Output = Lines: HIGH + 39 V t Changes 1.5 V,4OO pA from LOW HIGH rnax. to at beginning of measuremenr = LOW + 0.3 V r 0J V, lS and returns mA rnax. to LOW at completion of a
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Model34904 Section II REMOTE INPUT CONNECTOR J7 oPTtoN 022 FE lo rE=ä;: e t:uE3X:I-- F 6 s i ä 52 H * E I = qd 5 fr i F 3 ä E ? " ; 3 2- 39H;;5EEiF== 34904-B-296a ä-j=!9il äEHäEä t:Litr Mating Connector: EF!!A -hp- Part No. 1251 {O84 = Ir qc Amphenol No. * 57-3Ob00-37S - .< =a * LOGIC LEVELS (Cont'd) INPUT SIcNALS = . + t pA lnput Lines: HIGH 3.9 V 1.5 V, 100 rnax; or Sample/Hold Programming (Option O40): open circuit Mode Delay = LOW + 0.3 V I 0.3 V, 2 mA rnax.; or contact Track
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II Model 3490A Section -hp- No. (Amphenol connector J7 is Part l25l{084 mating end Figure connector; the other is unterminated. 57-30360-375). This connector is supplied with the 2-7 also shows the wire colors in this cable. Control option Remote 2-36. Purpose lnterface Bus General Connections. 2-34. Rear Input. 2-37 . Figure 2-9 shows the signal connections at the rear panel GPIB connector, Il2, and. gives a brief description 030 provide panel 2-35. Options 020 and a rear input of each
