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HP (Hewlett-Packard) 410C manual

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  • Page 1

    TM 11-6625-1614-15 DEPARTMENT OF THE ARMY TECHNICAL MANUA L ORGANIZATIONAL, DS, GS, AND DEPOT MAINTENANCE MANUAL HEWLETT-PACKARD ELECTRONIC VOLTMETER MODEL 410C This copy IS a reprint which includes curren t pages from Change 1 . HEADQUARTERS, DEPARTMENT OF THE ARM Y AUGUST 1967[...]

  • Page 2

    TM 11-6625-1614-15 WARNING DANGEROUS VOLTAGES EXIST IN THIS EQUIPMENT Be careful when working on the power supplies and their circuits, or on the 115- or 230-vol t ac line connections . DON’T TAKE CHANCES![...]

  • Page 3

    This manual contains copyrighted material prepared by the Hewlett-Packard Co. TM 11-6625-1614-15 TECHNICAL MANUAL HEADQUARTERS DEPARTMENT OF THE ARMY No. 11-6625-1614-15) W ASHINGTON , DC, 28 August 196 7 ORGANIZATIONAL, DS, GS, AND DEPOT MAINTENANCE MANUAL HEWLETT–PACKARD ELECTRONIC VOLTMETER MODEL 410C (NSN 6625-00-969-4105) Section I GENERAL 1[...]

  • Page 4

    TM 11-6625-1614-15 Section Number 1-1. 3-1. 5-1. 5-2. 5-3. 5-4. 5-5. 5-6. 5-7. 5-8. 5-9. 5-10. Number 1-1. 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. 5-7 . 5-9 . 5-10 . 5-13 . 5-16 . 5-17 . 5-21 . 5-22 . 5-26 . 5-28 . 5-29 . 5-30 . 5-31 . 5-33 . 5-34 . 5-35 . 5-36 . 5-45 . 5-48 . Alternate Voltage Source ------------[...]

  • Page 5

    TM 11-6625-1614-15 Number 4-4. 4-5. 4-6. 5-1. 5-2. 5-3. 5-4. 5-5. 5-6. 5-6.1 5-7. 5-8. 5-9. 5-10. 5-11. 5-12. 5-13. 5-14. Simplified Schematic, DC Voltage Measurements -------------------------------------------------------------- Simplified Schematic, Resistance Measurement ----------------------------------------------------------------- Simplifi[...]

  • Page 6

    Figure 1-1. TM 11-6625-1614-15 Model 410 C Section I Figure 1-1 1- 0[...]

  • Page 7

    TM 11-6625-1614-15 SECTION I GENERAL INFORMATION 1-A.1. Scope a. This manual includes installation and operation instructions and covers operator’s, organizational, direct support (DS), general support (GS), and depot maintenance. It describes Hewlett-Packard (Federal supply code 28480) Electronic Voltmeter Model 410C. This manual applies to equi[...]

  • Page 8

    [...]

  • Page 9

    Table 1-1. TM 11-6625-1614-15 Section I Table 1-1 Model 410C 01556-2 1-3[...]

  • Page 10

    TM 11-6625-1614-15 Model 410C 1-1. DESCRIPTION. 1-2. The Hewlett-Packard Model 4l0C Electronic Voltmeter can be used to measure DC voltage and DC current; AC voltage and resistance. Positive and negative DC voltages from 10 millivolts to 1500 volts and positive and negative DC currents from 1.5 microamperes to 150 milliamperes can be measured full [...]

  • Page 11

    Model 410C TM 11-6625-1614-15 1-4. ACCESORIES AVAILABLE . 1-5. MODEL 11036A AC PROBE. This accessory, when used with the Model 410C, permits AC voltage measurements from 0.5 volt rms to 300 volts rms, full scale over a frequency range of 20 cps to 700 Mc. Reference calibration accuracy at 400 cps (sinusoidal) is ±3% of full scale. Frequency respon[...]

  • Page 12

    Model 410C TM 11-6625-1614-15 Section II Figures 2-l and 2-2 Figure 2-1. The Combining Case Figure 2-2. Steps to Place Instrument in Combining Case 2-0 01556-1[...]

  • Page 13

    TM 11-6625-1614-15 Model 410C Section II Paragraphs 2-1 to 2-13 SECTION II INSTALLATION . 2-1. INSPECTION. 2-2. ‘This instrument was carefully inspected both mechanically and electrically, before shipment. It should be physically free of mars or scratches and in perfect electrical order upon receipt. To confirm this, the instrument should be insp[...]

  • Page 14

    TM 11-6625-1614-15 Section II Paragraph 2-14 to 2-15 DO NOT CHANGE THE SETTING OF THE LINE VOLTAGE SWITCH WHEN THE VOLT- METER IS OPERATING. 2-14. REPACKAGING FOR SHIPMENT. 2-15. The following paragraphs contain a general guide for repackaging of the instrument for shipment. Refer to Paragraph 2-16 if the original container is to be used: 2-17 if i[...]

  • Page 15

    TM 11-6625-1614-15 Model 410C Section III Paragraph 3-1 to 3-18 SECTION III OPERATION . 3-1. INTRODUCTION. 3-2. The Model 410C is used to measure AC and DC voltage, DC current, and resistance. All measure- ment inputs are located on the front panel; a DC out- put connector is located on the rear panel. Front panel controls and indicators are color [...]

  • Page 16

    TM 11-6625-1614-15 Section III Model 410C Figure 3-1 1. 2. 3. 4. 5. 6. 7. FUNCTION SELECTOR: This control is used for selecting type of measurement to be made. They are: ±DC Voltage, ±DC Current, AC Voltage, and resistance measurements. AC ZERO: This control provides adjustment for zero-setting the meter before making AC volt- age measurements. M[...]

  • Page 17

    Model 410C TM 11-6625-1614-15 Section III Paragraphs 3-19 to 3-27 and Table 3-1 second maY be made without loss of accuracy by re- moving the. plastic nose on the Model 11036A and using in its place a 0.25 microfarad blocking capacitor in series with the exposed contact of the probe. THE GRAY INSULATING MATERIAL AROUND THE AC PROBE IS POLY- STYRENE[...]

  • Page 18

    TM 11-6625-1614-15 Section III Paragraphs 3-28 to 3-34 PRF is the pulse repetition frequency in pulses per second (pps). Suppose, for example: t 1 = t 2 = K = PRF = 10 microseconds 990 microseconds 0.55 1000 pps To find K, assuming / = 2 kilohms and t l=10micro- seconds: R o / t l = 2 10° = 0.2. Location 0.2 on the X axis of the graph shown as Fig[...]

  • Page 19

    TM 11-6625-1614-15 Model 410C Section III Figure 3- 2 01556-2 Figure 3-2. DC Voltage Measurements 3-5[...]

  • Page 20

    TM 11-6625-1614-15 Section III Model 410C Figure 3-3 Figure 3-3. DC Current Measurements 3-6 01556-3[...]

  • Page 21

    TM 11-6625-1614-15 Model 410C Section III Model 410C Figure 3-4. AC Voltage Measurements 01556-3 3-7[...]

  • Page 22

    Figure 3-5. TM 11-6625-1614-15 Section III Figure 3-5 Model 410C 3-8 01556- 2[...]

  • Page 23

    TM 11-6625-1614-15 Model 410C Section III Figure 3-6 Figure 3-6. Graph Used in Calculation of Pulse Voltage Readings 01556-2 3-9[...]

  • Page 24

    TM 11-6625-1614-15 Section III Model 410C Figure 3-7 Figure 3-7. Resistance Measurements 3-10 01556-2[...]

  • Page 25

    TM 11-6625-1614-15 Model 410C Section III Figure 3-8 Figure 3-8. DC Nano-Amoere Current Measurements 01556-3 3-11[...]

  • Page 26

    TM 11-6625-1614-15 Section IV Figure 4-1 and 4-2 Model 410C Figure 4-1. Block Diagram, Model 410C Figure 4-2. Modulator-Demodulator Mechanical Analogy 4-0 01556-2[...]

  • Page 27

    TM 11-6625-1614-15 Model 410C Section IV Paragraph 4-1 to 4-18 4-1. 4-2. OVERALL DESCRIPTION. The Model 410C includes SECTION IV THEORY OF OPERATION an input network, a modulator - amplifier- demodulator, and a meter circuit. A block diagram of the Model 410C is shown in Figure 4-1. 4-3. Signals to be measured are applied through the appropriate in[...]

  • Page 28

    TM 11-6625-1614-15 Section IV Paragraphs 4-19 to 4-31 Model 410C voltage or current being measured) to the neon-photo- conductor chopper. Also applied to the opposite side of the chopper is the amplifier feedback voltage, which is of the same polarity and approximately 5 micro- volts lower in amplitude than the input voltage. The modulator-chopper [...]

  • Page 29

    Figure 4-3. Model 410C TM 11-6625-1614-15 Section IV Figure 4-3 01556-2 4-3[...]

  • Page 30

    Figure 4-4. TM 11-6625-1614-15 Section IV Figure 4-4 Model 410C 4-4 01556-2[...]

  • Page 31

    Figure 4-5. TM 11-6625-1614-15 Section IV Figure 4-5 01556-2 4-5[...]

  • Page 32

    Figure 4-6. TM 11-6625-1614-15 Section IV Figure 4-6 Model 410C 4- 6 01556-2[...]

  • Page 33

    [...]

  • Page 34

    TM 11-6625-1614-15 Section V Model 410C Table 5-1 Table 5-1. Recommended Test Equipment Instrument Type Required Characteristics Use Recommended Model Voltmeter Calibrator Range: .015 to 300 v AC and DC Accuracy @ Model 738BR Volt- Frequency: DC and 400 cps Checks and Calibration meter Calibrator Accuracy: +0. 370 AC Adjustments *O. 2%0 DC DC Power[...]

  • Page 35

    TM 11-6625-1614-15 Model 410C Section V Paragraphs 5-1 to 5-11 5-1. INTRODUCTION . SECTION V MAINTENANCE 5-2. This section contains maintenance procedures for the Model 410C Electronic Voltmeter. 5-3. TEST EQUIPMENT REQUIRED. 5-4. The test equipment required to maintain and adjust the Model 410C is listed in Table 5-1. Equi- pment having similar ch[...]

  • Page 36

    TM 11-6625-1614-15 Section V Paragraphs 5-12 to 5-15 Table 5-2 Model 410C Table 5-2. DCV Accuracy Test Model 410C Range Settings .015V .05 V .15 V .5 V 1.5 V 5 V 15 V 50 V 150V 500 V 1500 5-12 Voltmeter Calibrator Model 738B Settings Range 1. 5-5 1. 5-5 1. 5-5 1. 5-5 1. 5-5 1. 5-5 1. 5-5 1. 5-5 1.5-5 1-3 1-3 b. Adjust Voltmeter Calibrator to provid[...]

  • Page 37

    TM 11-6625-1614-15 Model 410C Section V Tables 5-3 and 5-4 Figure 5-2 Figure 5-2. DC Ammeter Operation Table 5-3. DCV Input Resistance Test Table 5-4. DCA Accuracy Test 01556-2 5-3[...]

  • Page 38

    TM 11-6625-1614-15 Section V Paragraphs 5-16 to 5-19 Table 5-5 Model 410C g . 5-16. c. Adjust dc power supply to provide system voltmeter reading of 1.50 v. e. Model 410C should read approximately 150 ma. This will verify a R in of approxi - mately 0.3 ohms, where R 410C = E total - R X I 410 C I 410C f. Set Model 410C RANGE to 1.5 µa. Replace Rx [...]

  • Page 39

    TM 11-6625-1614-15 . Model 410C Section V Parsgraphs 5-20 to 5-23 Figure 5-3 Figure 5-3. High Frequency Response Test c. Set Model 410C FUNCTION SELECTOR to +DCV ; RANGE to .015 V. d. Adjust voltmeter calibrator for +. 015 VDC output. e. The dc voltmeter should read +1.5 v. This will vertfy a gain of 100, when the gain /A/ equals E DC out/ E 410C. [...]

  • Page 40

    TM 11-6625-1614-15 Section V Model 410C Parsgraphs 5-24 to 5-25 Figure 5-4, Table 5-6 Figure 5-4. Low Frequency Response Test AC VOLTMETER ACCURACY CHECK. a. A Voltmeter Calibrator Model 738BR) will be required for this operation. b. Adjust voltmeter calibrator for 400 cps- rms output. c. Set Model 410C FUNCTION SELECTOR to ACV; RANGE to 500 V. d. [...]

  • Page 41

    Model 410C TM 11-6625-1614-15 b . Connect the Model 410C as shown in Figure 5-4. Set Mode l 410C FUNCTION SELECTOR toACV; RANGE to 1.5 V. c . Set frequency response test set to EXTERNAL . d . Adjust test oscillator output AMPLITUDE to provide Mode l 410C reading of 1.4 V; FREQUENCY to 400 cps. e . Set frequency response test set METER SET to conven[...]

  • Page 42

    TM 11-6625-1614-15 Model 410C k. Vary RF signal generator frequency from 10 Mc to 480 Mc . Model 410C should read between 0.40 to 0.50 v at all frequencies . l . If power meter pointer varies from reference determined i n step j above, readjust RF signal generator OUTPUT LEVEL to retur n pointer to reference deflection . m . To check Model 410C fre[...]

  • Page 43

    TM 11-6625-1614-15 b. Use ac voltmeter to verify Model 410C lin e f. Observe counter, and adjust A3R5 for a chop- voltage of 115 v. Chopper frequency will vary with per frequency of 100 cps ( ±2 cps). line voltage variations. c. Connect 410C, electronic counter, an d 5-29. Power Supply Adjustmen t voltmeter as ahown in Figure 5-6.1. a. Refer to Ta[...]

  • Page 44

    [...]

  • Page 45

    Model 410C TM 11-6625-1614-15 b . Adjust DC Standard (H-P Model 740A) to apply .015 to Mode l 410C . c . Model 410C should read full scale . If not, adjust A6R1 8 for proper pointer deflection . d . Reset Model 410C RANGE to 1500 v. Adjust dc standard fo r 1000 v output . e . Adjust A3R30 for Model 410C reading of 985 v (1% low) . f . If an error g[...]

  • Page 46

    TM 11-6625-1614-15 Model 410C b . Short OHMS and COM cables. Model 410C should read zero . c . Vary Model 410C RANGE switch through remainder of OHMS settings . Meter should read zero, except at RX10 when mete r should read about 0.1 ohm (resistance of leads) . d . Disconnect OHMS and COM cables. Model 410C meter should read . If not, set OHMS ADJ [...]

  • Page 47

    Table 5-8. Model 410 C TM 11-6625-1614-15 5-1 3[...]

  • Page 48

    TM 11-6625-1614-15 Model 410C Section V Paragraphs 5-38 to 5-46 instrument circuitry in an effort to localize the pro- blem. These operations should be undertaken only after it has been established that the difficulty can not be eliminated by the Adjustment and Calibration Pro- cedures, Paragraph 5-26. An investigation should also be made to insure[...]

  • Page 49

    Section V paragraphs 5-47 to 5-48 Figure 5-6 boards. Use caution when removing them to avoid damaging mounted components. The Part Number for the assembly is silk screened on the interior of the circuit board to identify it. Refer to Section VI for parts replacement and Part Number information 5-47. The etched circuit boards are a plated-through ty[...]

  • Page 50

    Table 5-9. Paragraph 5-34 Table 5-10 TM 11-6625-1614-15 Model 410C Section V Table 5-9 01566-2 5-1 6[...]

  • Page 51

    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 5-9 TM 11-6625-1614-15 Section V Model 410C Table 5-10 5-1 7[...]

  • Page 52

    TM 11-6625-1614-15 Model 410C Figure 5-11. Model 11036A AC Probe (Exploded View) 5-22 Figure 5-12. Model 11036A AC Probe Schematic 01556-2[...]

  • Page 53

    Figure 5-6.1. TM 11-6626-1614-15 Change 1 5-16.1[...]

  • Page 54

    [...]

  • Page 55

    TM 11-6625-1614-15 Section V Figure 5-8 Figure 5-8. Power Supply Schematic 5-19[...]

  • Page 56

    5-20 TM 11-6625-1614-15 Figure 5-9. Typical Amplifier Waveforms[...]

  • Page 57

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  • Page 60

    By Order of the secretary of the Army: Official : KENNETH G. WICKHAM, Major General, United States Army, The Adjutant General. Distribution: Active Army; USAMB (1) USACDCEC (.1) USACDCCEA (1) USA CDCCEA Ft Huachuca (1) NG: None. USAR: None. For explanation of abbreviations used, see AR 320-50. HAROLD K. JOHNSON, General, United States Army, Chief o[...]

  • Page 61

    [...]

  • Page 62

    THE METRIC SYSTEM AND EQUIVALENTS[...]

  • Page 63

    PIN: 016288-00 0[...]