FLUKE 803D_Army 电路图.pdf

TM 9-4935-282-34 DEPARTMENT OF THE ARMY TECHNICAL MANUAL FIELD MAINTENANCE MANUAL VOLTMETER, ELECTRONIC JOHN FLUKE MODEL 803D FSN 6625-072-4303 This copy is a reprint which includes current pages from Change 1. HEADQUARTERS, DEPARTMENT OF THE ARMY MARCH 1964 RadioFans.CN 收音机爱 好者资料库 TM 9-4935-282-34 C1 WARNING RADIATION HAZARD This equipment contains the following radioactive items: NomenclatureFSNIsotopeAmount (Microcuries) OA2 Vacuum tube5960-503-4880UO 20.10uc OA2 Vacuum tube5960-503-4880Ni630.50uc OA2 Vacuum tube5960-503-4880Co600.20uc OG3-2 Vacuum tube5960-912-7630UnknownUnknown Refer to TM 3-261, TM 38-250, and TB 750-237 for information relative to shipping, storage, handling, and disposal of radioactive material. FIRST AID FOR RADIOACTIVE CONTACT The following first aid procedure for wounds caused by anything coated with a radioactive material represents the only reasonable first aid treatment which would possibly be available. a.Stimulation of mild bleeding by normal pressure about the wound and by use of suction cups. WARNING: Do no suck the wound by mouth. The wound must be washed with soap and flushed with plenty of clear water. b.If the wound is of the puncture type, or the opening is quite small, an incision should be made to promote free bleeding and to facilitate cleaning and flushing of the wound. c.Evacuate patient to a medical facility where monitoring of the wound can be accomplished. All such wounds should be examined by a medical officer. d.For wounds involving the extremities, pending medical attention, place a lightly constricting band (tourniquet) 2 to 4 inches closer to the heart than the site of the wound. The band should be tight enough to halt the flow of blood in superficial blood vessels but not tight enough to stop the pulse arterial flow). CLEANING SURFACES ON WHICH TUBES HAVE BEEN BROKEN Wet Method. Put on rubber or plastic gloves. Pick up large fragments with forceps; then, using a wet cloth, wipe across the area. Make one wipe at a time and fold cloth in half, using the clean side for wiping each time. When cloth becomes too small, discard and start again with a clean piece of cloth. Care must be taken not to rub the radioactive particles into the surface being cleaned by using a back and forth motion. All debris and cloths used for cleaning should be sealed in a container such as a plastic bag, heavy waxed paper, ice cream carton, or glass jar for disposal. RadioFans.CN 收音机爱 好者资料库 TM 9-4935-282-34 ERRATA AND ADDENDUM Model 803D/AC This manual was intended for use with the 803D AC/DC Differential Voltmeters. The 803D/AC, however, is very nearly electrical identical to the 803D/AG. Physical and electrical differences include: 1.The Model 803D/AC is mounted in a combination instrument-transit case made of aluminum. This case meets all environmental requirements of MIL-T-945A. 2.The Model 803D/AC does not have recorder output provisions. 3.Line power input for the Model 803D/AC is by way of an MS3102A-10SL-3P connector on the front panel. A power input cable with a mating connector (MS3102A-10SL-3S), a three-prong polarized connector, and a three- prong to two-prong grounded adapter is furnished. Storage space for the input cable is provided in the lid o the combination case. 4.One set of universal test leads (part no. 699 - Hermin H. Smith, Inc., Brooklyn, New York) is provided with the Model 803D/AC. These test leads are stored in the lid with the power input cable. 5.Heater resistors R6 and R7 are not used in the Model 803D/AC because the instrument is completely enclosed by the transit case. However, a Zener oven containing a heater and a thermostat must be used to maintain the Zener diode reference element at a constant temperature. The Zener diode plugs into the inside of the Zener oven and the Zener oven plugs into a chassis mounted tube socket. 6.The line fuse is located on the front panel of the 803D/AC. 7.The 803D/AC uses a specially enclosed transformer to prevent leakage at higher operating temperatures. 8.The converter output diodes of the 803D/AC are selected for low leakage to provide for proper operation at the higher operating temperatures reached within the transit case. (a) RadioFans.CN 收音机爱 好者资料库 TM 9-4935-282-34 To create a parts list for the 803D/AC, change the 803D list of replaceable parts as follows: Delete: Front Panel Assembly*803D/AG-435 Converter/AC Range Switch Assembly*803D-438 CR501, 502Diode, silicon, 60 maRE22 J4, J5Binding post, redX2231 Binding post insulator, dual, black*801B-830 R1Resistor, variable wirewound, 10K, +10%, 2WP10KA R6, R7Resistor, wirewound, 6K +5%, 5WR6KW T1Transformer, power*803C-651 Line cord, 3 wireX27H Rubber footX224 Case Assembly (cabinet model) *803B-271 Handle, flexible black vinyl, 5-1/2 (cabinet model)407-101 Add: Front Panel Assembly*803D/AC-403 Converter/AC Range Switch Assembly*803D/AC-404 CR501, 502Diode, silicon, 60 ma, 40 PIV (selected RE22) *803D/AC-402 T1Transformer, power*821A-651 Case, instrument-transit*803D/AC-271 Connector (mates with line cord) M3102A-10SL-3P Line cord*803D/AC-401 Test lead setX2322 Tube socket (for Zener oven) X52 Zener diode oven (includes heater and thermostat)X2259 (b) TM 9-4935-282-34 To create a schematic diagram for the 803D/AC, change the 803D schematic as follows: c TM 9-4935-282-34 803D Material in this manual is used by permission of John Fluke Manufacturing Company, Inc. TABLE OF CONTENTS SectionTitlePage IINTRODUCTION AND SPECIFICATIONS1-1 1-1.Introduction.1-1 1-2.Damage in Shipment .1-1 1-3.Specifications.1-1 IIOPERATING INSTRUCTIONS2-1 2-1.Controls, Terminals, and Indicators .2-1 2-2.Zeroing Instructions .2-3 2-3.Preliminary Operation.2-3 2-4.Operation as a DC Differential Voltmeter .2-3 2-5.Operation as an AC Differential Voltmeter .2-3 2-6.Operation as a Conventional VTVM.2-4 2-7.Measurement of Voltage Excursions About a Nominal Value.2-4 2-8.Use of 803D with a Recorder.2-5 2-9.Measurement of High Resistances .2-6 2-10.Notes on Measuring AC or DC Voltages .2-6 2-11.Notes on Measuring DC Voltages .2-7 2-12.Notes on Measuring AC Voltages.2-7 IIITHEORY OF OPERATION3-1 3-1.General .3-1 3-2.DC Vacuum Tube Voltmeter.3-1 3-3.0 to 500 Volt Reference Supply .3-3 3-4.AC to DC Converter.3-4 3-5.AC - DC Polarity Switch.3-4 IVMAINTENANCE4-1 4-1.General .4-1 4-2.Periodic Maintenance.4-1 4-3.Corrective Maintenance.4-1 4-4.Calibration .4-5 VLIST OF REPLACEABLE PARTS5-1 VIACCESSORIES6-1 6-1.Precision Voltage Dividers.6-1 6-2.Potentiometric Recorder .6-2 WARRANTY CIRCUIT DIAGRAM i TM 9-4935-282-34 803D LIST OF ILLUSTRATIONS FigureTitlePage FrontispieceModel 803D AC/DC Differential Voltmeter .iv 2-1Controls, Terminals, and Indicators (sheet 1 of 2).2-1 2-1Controls, Terminals, and Indicators (sheet 2 of 2) .2-2 2-2Recommended Null Settings.2-3 2-3VTVM Ranges .2-4 2-4Full Scale AC Deflections .2-5 2-5Recorder Recommended Connection Diagram .2-5 2-6Percent Error Due to Harmonic Distortion .2-7 2-7Signal Voltage with Converter Noise.2-8 3-1803D AC/DC Differential Voltmeter Block Diagram.3-1 3-2Function of Polarity Switch.3-5 4-1Troubleshooting (sheet 1 of 2).4-2 4-1Troubleshooting (sheet 2 of 2) .4-3 4-2Tube Voltage Chart .4-4 4-3Calibration Equipment .4-5 4-4Adjustment Locations .4-6 4-5AC to DC Converter Calibration Set-up.4-7 5-1Final Assembly (sheet 1 of 2).5-3 5-1Final Assembly (sheet 2 of 2).5-4 5-2Front Panel Assembly (sheet 1 of 2) .5-6 5-2Front Panel Assembly (sheet 2 of 2) .5-7 5-3Reference Supply Board Assembly .5-9 5-4Null Detector Chassis Assembly.5-12 5-5Range Resistor Board Assembly.5-14 5-6Kelvin-Varley Resistor Board Assembly .5-15 5-7Converter/AC Range Switch Assembly (sheet 1 of 2) .5-18 5-7Converter/AC Range Switch Assembly (sheet 2 of 2) .5-19 5-8Chopper Drive Assembly .5-20 iii TM 9-4935-282-34 iv TM 9-4935-282-34 803D SECTION I INTRODUCTION AND SPECIFICATIONS 1-1. INTRODUCTION a.This instruction manual is for use with the 803D series AC/DC Differential Voltmeters. These are available in either a cabinet model or a standard 19 inch rack model, and with either a standard cell or a Zener diode as the reference element. Model designations are: 803D (cabinet model, standard cell); 803DR rack model, standard cell); 803D/AG (cabinet model, Zener diode); and 803DR/AG (rack model, Zener diode). b.The high accuracy, portability, and compactness of the 803D make this instrument ideal for the precise measurement of almost any AC or DC voltage. Ease operation, inherent protection from accidental overload, and high reliability contribute to the outstanding performance that assures suitability for both production line testing and precision laboratory measurements. This instrument is capable of being used as a vacuum tube voltmeter, as a precision potentiometer, and as a megohmmeter for measurement of high resistance. It can also be used to measure the excursions of a voltage about some nominal value. One feature that should be emphasized is that no current is drawn from the unknown source for DC measurements when balance is attained. Thus the determination of the unknown DC potential is independent of its source resistance. The 803D is basically used for measurements of DC voltages from 0 to 500 volts and AC voltages from 0.001 to 500 volts. However, high accuracy measurements to 30,000 volts DC are possible with precision voltage dividers especially designed for use with the Fluke Model 800 Series Differential Voltmeters. As additional features, this instrument contains a polarity switch for equal convenience in measuring positive or negative DC voltages and an adjustable recorder output which makes the 803D particularly useful for monitoring the stability of almost any AC or DC voltage. Furthermore, the 803D meter has taut-band suspension which eliminates problems due to meter stickiness. c.When used as a DC differential voltmeter, the 803D operates on the potentiometric principal. An unknown voltage is measured by comparing it to a known adjustable reference voltage with the aid of a null detector. An accurate standard for measurements is obtained by setting the reference supply with a standard cell for the 803D and 803DR and with a Zener reference diode for the 803D/AG and 803DR/AG. The known adjustable reference voltage is provided by a 500 volt DC power supply and five Kelvin-Varley decade resistor strings that are set accurately by five voltage readout dials. In this way, the 500 volts can be precisely divided into increments as small as 10 microvolts. The unknown voltage is then simply read from the voltage dials. When used as an AC differential voltmeter, the 803D operates essentially the same as for DC differential measurements. The AC input voltage is converted to a DC voltage and this DC voltage is measured by comparing it to a known adjustable reference voltage. In the highest recommended null sensitivity range, potential differences between the unknown and the reference voltage of only 0.001 volts for DC and 0.001 volts for AC will cause full scale meter deflection. d.The instrument is normally supplied ready for use on 115 volts. Upon request, instruments are supplied for 230 volts operation. If it becomes desirable to convert from one mode of operation to the other, refer to the instruction decal on the back of cabinet models or on the cover in rack models. 1-2. DAMAGE IN SHIPMENT Immediately upon receipt, thoroughly inspect for any damage that may have occurred in transit. If any damage is noted, follow the instructions outl