TM 11-6625-1614-15DEPARTMENT OF THE ARMY TECHNICAL MANUALORGANIZATIONAL, DS, GS,AND DEPOT MAINTENANCE MANUALHEWLETT-PACKARDELECTRONIC VOLTMETERMODEL 4
TM 11-6625-1614-15Model 410C1-1. DESCRIPTION.1-2. The Hewlett-Packard Model 4l0C Electronic Voltmeter can beused to measure DC voltage and DC current;
Model 410CTM 11-6625-1614-151-4. ACCESORIES AVAILABLE .1-5. MODEL 11036A AC PROBE.This accessory, when used with theModel 410C, permits AC voltage mea
Model 410CTM 11-6625-1614-15Section IIFigures 2-l and 2-2Figure 2-1. The Combining CaseFigure 2-2. Steps to Place Instrument in Combining Case2-00155
TM 11-6625-1614-15Model 410CSection IIParagraphs 2-1 to 2-13SECTION IIINSTALLATION.2-1. INSPECTION.2-2. ‘This instrument was carefully inspected both
TM 11-6625-1614-15Section IIParagraph 2-14 to 2-15DO NOT CHANGE THE SETTING OF THELINE VOLTAGE SWITCH WHEN THE VOLT-METER IS OPERATING.2-14. REPACKAG
TM 11-6625-1614-15Model 410CSection IIIParagraph 3-1 to 3-18SECTION IIIOPERATION.3-1. INTRODUCTION.3-2. The Model 410C is used to measure AC and DCvo
TM 11-6625-1614-15Section IIIModel 410CFigure 3-11.2.3.4.5.6.7.FUNCTION SELECTOR: This control is used forselecting type of measurement to be made.
Model 410CTM 11-6625-1614-15Section IIIParagraphs 3-19 to 3-27 and Table 3-1second maY be made without loss of accuracy by re-moving the. plastic nose
TM 11-6625-1614-15Section IIIParagraphs 3-28 to 3-34PRF is the pulse repetition frequency in pulses persecond (pps).Suppose, for example:t 1 =t 2 =K=
TM 11-6625-1614-15Model 410CSection IIIFigure 3-201556-2Figure 3-2. DC Voltage Measurements3-5
TM 11-6625-1614-15WARNINGDANGEROUS VOLTAGESEXIST IN THIS EQUIPMENTBe careful when working on the power suppliesand their circuits, or on the 115- or 2
TM 11-6625-1614-15Section IIIModel 410CFigure 3-3Figure 3-3. DC Current Measurements3-601556-3
TM 11-6625-1614-15Model 410CSection IIIModel 410CFigure 3-4. AC Voltage Measurements01556-33-7
Figure 3-5.TM 11-6625-1614-15Section IIIFigure 3-5Model 410C3-801556-2
TM 11-6625-1614-15Model 410CSection IIIFigure 3-6Figure 3-6. Graph Used in Calculation of Pulse Voltage Readings01556-23-9
TM 11-6625-1614-15Section III Model 410CFigure 3-7Figure 3-7.Resistance Measurements3-1001556-2
TM 11-6625-1614-15Model 410CSection IIIFigure 3-8Figure 3-8.DC Nano-Amoere Current Measurements01556-33-11
TM 11-6625-1614-15Section IVFigure 4-1 and 4-2Model 410CFigure 4-1. Block Diagram, Model 410CFigure 4-2. Modulator-Demodulator Mechanical Analogy4-001
TM 11-6625-1614-15Model 410CSection IVParagraph 4-1 to 4-184-1.4-2.OVERALL DESCRIPTION.The Model 410C includesSECTION IVTHEORY OF OPERATIONan input ne
TM 11-6625-1614-15Section IVParagraphs 4-19 to 4-31Model 410Cvoltage or current being measured) to the neon-photo-conductor chopper. Also applied to t
Figure 4-3.Model 410CTM 11-6625-1614-15Section IVFigure 4-301556-24-3
This manual contains copyrighted material prepared by the Hewlett-Packard Co.TM 11-6625-1614-15TECHNICAL MANUALHEADQUARTERSDEPARTMENT OF THE ARMYNo. 1
Figure 4-4.TM 11-6625-1614-15Section IVFigure 4-4Model 410C4-401556-2
Figure 4-5.TM 11-6625-1614-15Section IVFigure 4-501556-24-5
Figure 4-6.TM 11-6625-1614-15Section IVFigure 4-6Model 410C4-601556-2
TM 11-6625-1614-15Section VModel 410CTable 5-1Table 5-1. Recommended Test EquipmentInstrument TypeRequired CharacteristicsUseRecommended ModelVo
TM 11-6625-1614-15Model 410CSection VParagraphs 5-1 to 5-115-1. INTRODUCTION.SECTION VMAINTENANCE5-2. This section contains maintenance proceduresfor
TM 11-6625-1614-15Section VParagraphs 5-12 to 5-15Table 5-2Model 410CTable 5-2. DCV Accuracy TestModel 410CRange Settings.015V.05V.15V.5V1.5V5V15 V50
TM 11-6625-1614-15Model 410CSection VTables 5-3 and 5-4Figure 5-2Figure 5-2. DC Ammeter OperationTable 5-3. DCV Input Resistance TestTable 5-4. DCA Ac
TM 11-6625-1614-15Section VParagraphs 5-16 to 5-19Table 5-5Model 410Cg.5-16.c. Adjust dc power supply to provide systemvoltmeter reading of 1.50 v.e.
TM 11-6625-1614-15.Model 410CSection VParsgraphs 5-20 to 5-23Figure 5-3Figure 5-3.High Frequency Response Testc. Set Model 410C FUNCTION SELECTOR to+
TM 11-6625-1614-15SectionNumber1-1.3-1.5-1.5-2.5-3.5-4.5-5.5-6.5-7.5-8.5-9.5-10.Number1-1.2-1.2-2.2-3.2-4.3-1.3-2.3-3.3-4.3-5.3-6.3-7.3-8.4-1.4-2.4-3.
TM 11-6625-1614-15Section VModel 410CParsgraphs 5-24 to 5-25Figure 5-4, Table 5-6Figure 5-4. Low Frequency Response TestAC VOLTMETER ACCURACY CHECK.a.
Model 410CTM 11-6625-1614-15b. Connect the Model 410C as shown in Figure 5-4. Set Model410C FUNCTION SELECTOR toACV; RANGE to 1.5 V.c. Set frequency r
TM 11-6625-1614-15Model 410Ck. Vary RF signal generator frequency from 10 Mc to 480 Mc.Model 410C should read between 0.40 to 0.50 v at all frequencie
TM 11-6625-1614-15b. Use ac voltmeter to verify Model 410C linef. Observe counter, and adjust A3R5 for a chop-voltage of 115 v. Chopper frequency wi
Model 410CTM 11-6625-1614-15b. Adjust DC Standard (H-P Model 740A) to apply .015 to Model410C .c. Model 410C should read full scale.If not, adjust A6R
TM 11-6625-1614-15Model 410Cb. Short OHMS and COM cables. Model 410C should read zero.c. Vary Model 410C RANGE switch through remainder of OHMSsetting
Table 5-8.Model 410CTM 11-6625-1614-155-13
TM 11-6625-1614-15Model 410CSection VParagraphs 5-38 to 5-46instrument circuitry in an effort to localize the pro-blem. These operations should be und
Section Vparagraphs 5-47 to 5-48Figure 5-6boards. Use caution when removing them to avoiddamaging mounted components. The Part Numberfor the assembl
TM 11-6625-1614-15Number4-4.4-5.4-6.5-1.5-2.5-3.5-4.5-5.5-6.5-6.15-7.5-8.5-9.5-10.5-11.5-12.5-13.5-14.Simplified Schematic, DC Voltage Measurements --
Table 5-9. Paragraph 5-34 Table 5-10TM 11-6625-1614-15Model 410CSection VTable 5-901566-25-16
Figure 5-7.Table 5-10. Paragraph 5-29 Figure 5-10 Figure 5-7 Table 5-9 Figure 5-10 Figure 5-10 Table 5-9TM 11-6625-1614-15Section VModel 410CTable 5-1
TM 11-6625-1614-15Model 410CFigure 5-11.Model 11036A AC Probe (Exploded View)5-22Figure 5-12. Model 11036A AC Probe Schematic01556-2
Figure 5-6.1.TM 11-6626-1614-15Change 15-16.1
TM 11-6625-1614-15Section VFigure 5-8Figure 5-8.Power Supply Schematic5-19
5-20TM 11-6625-1614-15Figure 5-9. Typical Amplifier Waveforms
Figure 1-1.TM 11-6625-1614-15Model 410CSection IFigure 1-11-0
By Order of the secretary of the Army:Official:KENNETH G. WICKHAM,Major General, United States Army,The Adjutant General.Distribution:Active Army;USAM
THE METRIC SYSTEM AND EQUIVALENTS
PIN: 016288-000
TM 11-6625-1614-15SECTION IGENERAL INFORMATION1-A.1. Scopea. This manual includes installation and operationinstructions and covers operator’s, organi
Table 1-1.TM 11-6625-1614-15Section ITable 1-1Model 410C01556-21-3
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