FLUKE 801 电路图.pdf

THIS COPY IS A REPRINT, WHICH INCLUDES CURRENT PAGES FROM CHANGES 1 THROUGH 5 _ *This bulletin supersedes TB 9-6625-994-50, 28 July 1969 and TB ORD 1026/981, 12 October 1964 including all changes. *TB 9-6625-1866-50 DEPARTMENT OF THE ARMY TECHNICAL BULLETIN CALIBRATION PROCEDURE FOR DIFFERENTIAL VOLTMETERS AN/USM-98, AN/USM-98A, AND AN/USM-98B (JOHN FLUKE MODELS 801, 801R, 801B, 801BR, 801B/AG) Headquarters, Department of the Army, Washington, DC 19 September 1970 REPORTING OF ERRORS You can help improve this publication by calling attention to errors and by recommending improvements and stating your reasons for the recommendations. Your letter or DA Form 2028, Recommended Changes to Publications, should be mailed directly to Commander, U.S. Army Aviation and Missile Command, ATTN: AMSAM-TMD-EP, Redstone Arsenal, AL 35898-5000. FAX to DSN 788- 2313 (commercial 256-842-2313). A reply will be furnished directly to you. ParagraphPage SECTIONI.GENERAL Purpose and scope.12 Reporting of equipment publication improvements.22 Descriptive data .32 General Instructions.43 Differences among models.54 II.CALIBRATION OF DIFFERENTIAL VOLTMETERS AND/USM-98 (J-F 801 and 801R) Equipment and accessory required.64 Preliminary procedure.74 Dc VTVM and null range.85 500-volt range and stability.97 50-volt range.109 5-volt range.119 0.5-volt range.1220 RadioFans.CN 收音机爱 好者资料库 TB 9-6625-1866-50 2 ParagraphPage Voltage dividers .1310 Final procedure .1412 III.CALIBRATION OF DIFFERENTIAL VOLTMETERS AN/USM-98A AND AN/USM-98B (J-F 801B, J-F 801 BR, AND J-F 801B(AG) Equipment and accessories required.1512 Preliminary procedure.1612 Dc VTVM and null range.1713 500-volt range and stability.1816 50-volt range.1916 5-volt range.2017 0.5-volt range.2118 Voltage dividers .2219 Final procedure .2320 SPECIFIC ITEM IDENTIFICATION Identification.2420 Secondary transfer calibration standards set.2520 SECTION I GENERAL 1. Purpose and Scope. This bulletin provides information for the periodic calibration of Differential Voltmeters AN/USM-98, AN/USM-98A, and AN/USM-98B (John Fluke Models 801, 801R, 801B, 801BR, and 801B/AG). It is to be used by personnel trained and qualified in the use of calibration equipment. 2. Reporting of Equipment Publication Improvements. The reporting of errors, omissions, and recommendations for improving this publication by the individual user is encouraged. Reports should be submitted on DA Form 2028 (Recommended Changes to Publications) and forwarded direct to: Commander, US Army Missile Materiel Readiness Command, ATTN: DRSMI-MFPA, Redstone Arsenal, AL 35809. 3. Descriptive Data a. Identification NomenclatureDIFFERENTIAL VOLTMETER Military designationAN/USM-98, AN/USM-98A, and AN/USM-98B ManufacturerJohn Fluke Model number801, 801R, 801B, 801BR, and 801B/AG ReferenceManufacturers instruction manual, TM 11-6625-599-12, and TM 11-6625-599-45 RadioFans.CN 收音机爱 好者资料库 TB 9-6625-1866-50 3 b. Specifications AN/USM-98 (J-F 801 AND J-F 801R): Input requirement1100 to 130 vac, 60 Hz, 60 w Stability of reference supply10.01% for change in line voltage (105 to 130 v); 0.01% per hour after warm-up (adjustable via front panel CAL control). As a differential voltmeter: Input voltage ranges0 to 500 vdc in 4 ranges Accuracy0.05% from 0.1 to 500 vdc (0.1% of input voltage or 0.05 mv whichever is greater below 0.1 vdc. Null voltage ranges0 to 10, 0 to 1, 0 to 0.1 and 0 to 0.01 vdc Dc input resistance1Infinite at null (all ranges). As a vacuum tube voltmeter: Basic input voltage ranges0 to 500 vdc in 4 ranges Accuracy4% of full scale (all ranges). Additional voltage ranges20 to 0.01, 0 to 0.1, 0 to 1, and 0 to 10 vdc. AN/USM-98A and AN/USM-98B (J-F 801B, 801BR, and 801B/AG): Power input requirements115 or 230 vac, 10%, 50 to 440 Hz, approx. 70w. (801B and B/AG, S/N 123 to 1632, operate only on power-line frequencies of 50 to 60 Hz). Stability of meter zero10.5% of full scale for 10% line charge. As a differential voltmeter: Input voltage ranges0 to 500 vdc in 4 ranges Accuracy0.05% from 0.1 to 500 vdc (0.05% +50v) below 0.1 vdc. Null voltage ranges0 to 10, 0 to 1, 0 to 0.1 and, 0 to 0.01 vdc. Dc input resistanceInfinite at null (all ranges). As a vacuum tube voltmeter: Basic input voltage ranges0 to 500 vdc in 4 ranges. Accuracy3% of full scale (all ranges). Additional voltage ranges20 to 0.01, 0 to 0.1, 0 to 1, 0 to 10 vdc. c. Calibration Time required3 hours (approx.) TechniqueDc and low frequency - 1 This specification is for information only and is not necessarily verified in this bulletin. 2 These range are obtained by setting NULL switch to desired range and readout dials to zero. 4. General Instructions a. DA Form 2416 (Calibration Data Card). During the use of this bulletin, annotate DA Form 2416 in accordance with TM 38-750. b. Unit Under Test. Differential Voltmeters AN/USM-98 (John Fluke Model 801 and 801R) will be referred to as UUT (unit under test) in section II. Differential voltmeters RadioFans.CN 收音机爱 好者资料库 TB 9-6625-1866-50 4 AN/USM-98A and AN/ USM-98B (John Fluke Models 801B, 801BR, and 80 1B/AG) will be referred to as UUT in section III. c. Equipment and Accessory Identification. The equipment and accessories referred to throughout this bulletin are identified in tables 1, 2, 6 and 7 and section IV. d. Equipment Setup. Disconnect instructions are not contained in this bulletin. 5. Differences Among Models. Differential Voltmeter 801R is a rack-mounted version of the 801. AN/USM-98 is the military designation for the 801. Differential Voltmeter 801B contains a standard cell; the 801B/AG contains a Zener diode. The 801BR is the rack- mounted version of the 801B. AN/USM-98A is the military designation for the 801B and 801B/AG. The AN/USM-98B is similar to the 801B. Front panel designations may vary among models. SECTION II CALIBRATION OF DIFFERENTIAL VOLTMETERS AN/USM-98 (J-F 801 AND 801R) 6. Equipment and Accessory Required. Table 1 lists minimum use specifications of equipment required for calibration performance checks and adjustments. Table 2 lists the required accessory. Tables 1 and 2 are provided to assist in the selection of required equipment and accessory. For specific item identification refer to section IV. Table 1. Minimum Specifications of Equipment Required Item NumberCommon NameMinimum Use Specifications A1AUTOTRANSFORMERRANGE: 105 to 125 vac ACCURACY:1% A2DC VOLTAGE STANDARDRANGE: 0 to 520 v ACCURACY:0.016% Table 2. Accessory Required Item NumberCommon NameDescription B1CABLE30-in., RG-58/U; double banana plug terminations 7. Preliminary Procedure NOTE Personnel should familiarize themselves with the entire bulletin prior to performing calibration. a. With no power applied to UUT, mechanically zero meter, using meter mechanical zero adjustment screw. TB 9-6625-1866-50 5 b. Connect UUT to autotransformer (A1, table 1) and adjust for 115 volts ac. c. Turn VOLTS RANGE, switch to 500, NULL switch to VTVM, and all 5 attenuator switches to zero. d. Set UUT power switch to ON and allow approximately 15 minutes for equipment to warm up and stabilize. If UUT is Model 801B 48 hours (in upright position) may be required for stabilization of readings when UUT has been tilted more than 45. e. Set meter needle on zero with upper ZERO control. f.Turn NULL switch first to 10 V and then to 1 V and check that meter needle remains on zero. g. With NULL switch set to 0.1 V, adjust lower ZERO control to set meter needle on zero. h. Turn NULL switch to 0.01 V and check that meter needle remains on zero. i.Turn NULL switch to VTVM and VOLTS RANGE switch to .5. NOTE When the UUT is not within tolerance, perform the specified adjustment and continue the performance check. When the UUT is not within tolerance and no adjustment is specified, the deficiency must be corrected before continuing with the procedure. WARNING HIGH VOLTAGE is used during the performance of this procedure. DEATH ON CONTACT may result if personnel fail to observe safety precautions. 8. Dc VTVM and Null Range a. Performance Check (1) Connect dc voltage standard (A2, table 1) to UUT, using cable (B1, table 2). (2) Adjust dc voltage standard for full-scale indication (+500) on UUT meter. Dc voltage standard will indicate between 0.480 and 0.520 volts. If not, perform b(1) and (2) below. (3) Reverse polarity of UUT input and adjust dc voltage standard for full-scale (-500) indication on UUT. Dc voltage standard will indicate between 0.480 and 0.520 volt. (4) Reverse polarity of UUT input. TB 9-6625-1866-50 6 (5) Repeat technique of (2) through (4) above for UUT switch settings and indications listed in table 3. Dc voltage standard will indicate within limits specified. Table 3. Dc VTVM Unit under testDc voltage standard indication (V dc) VOLTS RANGE switchMeter indicationMinMax 55004.805.20 54003.804.20 53002.803.20 52001.802.20 51000.801.20 5050048.052.0 500500480.0520.0 (6) Adjust dc voltage standard for 0 (zero) indication on UUT. (7) Turn VOLTS RANGE switch to .5 and NULL, switch to .01 V. (8) Adjust dc voltage standard for full-scale indication on UUT meter. Dc voltage standard will indicate between 9.6 and 10.4 mv. If not, perform b(3) and (4) below. (9) Reverse input polarity to UUT. (10) Adjust dc voltage standard for full-scale indication on UUT meter. Dc voltage standard will indicate between 9.6 and 10.4 mv. (11) Reverse input polarity to UUT. (12) Repeat technique of (7) through (11) above for UUT switch settings and indications listed in table 4. Table 4. Null Range Unit under testDc voltage standard indication NULL switchIndicationMinMax .1196 mv104 mv 110.96 v1.04 v 1019.6 v10.4 v (13) Turn UUT NULL switch to VTVM. b. Adjustments (1) Adjust dc voltage standard for 0.500 volt (2) Adjust P104 (fig. 1) until UUT indicates 500. (3) Adjust dc voltage standard output to 10.00 mv. (4) Adjust P103 (fig. 1) for full-scale indication on UUT. TB 9-6625-1866-50 7 9. 500-Volt Range and Stability a. Performance Check (1) Turn UUT VOLTS RANGE switch to CAL and press and hold CAL PUSH (OP CAL to CAL) switch. (2) Adjust ADJ CAL control for 0 (zero) indication on UUT meter. Observe that ADJ CAL control is within 90 degrees of center of its rotation. If not, perform b(1) and (2) below. (3) Release CAL PUSH (OP-CAL, to OP) switch and turn VOLTS RANGE switch to 500. Figure 1. Differential voltmeter. TB 9-6625-1866-50 8 (4) Repeat paragraph 7e through i. Connect dc voltage standard (A2, table 1) to UUT, using cable (B1, table 2). (5) Turn UUT A, B, C, D, and E switches to 4, 9, 9, 9, and 10. Adjust dc voltage standard for full-scale indication on UUT. (6) Turn NULL switch to 10, 1, and .1 while adjusting dc voltage standard for 0 (zero) indication on UUT meter. Dc voltage standard will indicate between 499.750 and 500.250 volts. If not, perform b(3) through (9) below. (7) While maintaining null on UUT with dc voltage standard, vary autotransformer (A1, table 1) from 105 to 125 Volts. Dc voltage standard output will remain between 499.750 and 500.250 volts. If not, and no adjustment was performed in (6) above, perform b(3) through (9) below. (8) Adjust autotransformer output to 115 volts. (9) Turn UUT NULL switch to VTVM. (10) Adjust dc voltage standard for 0 (zero) indication on UUT meter. b. Adjustments (1) Center ADJ CAL knob. (2) Press CAL PUSH switch while adjusting P6 (fig. 1) for zero indication on UUT meter. NOTE Some models do not have CAL adjustment P6. (3) Turn NULL switch to VTVM, and adjust dc voltage standard output to 500.000 volts. (4) Adjust ADJ CAL for null (0) indication on UUT NULL switch in 10, 1, .1 and .01 V position. (5) Turn NULL switch to VTVM. (6) Adjust dc voltage standard for 0 (zero) volt. (7) Turn VOLTS RANGE switch to CAL. (8) Press and hold CAL PUSH (OP-CAL, to CAL) switch and adjust P2 (fig. 1) for null on UUT. TB 9-6625-1866-50 9 (9) Turn VOLTS RANGE switch to 500 and repeat a(5) and (6) above. 10. 50-Volt Range a. Performance Check (1) Turn, VOLTS RANGE switch to 50 and adjust dc voltage standard (A2, table 1) for full-scale indication on UUT meter. (2) Turn NULL switch to 10, 1, and .1 while adjusting dc voltage standard for 0 (zero) indication on UUT meter. Dc voltage standard will indicate between 49.975 and 50.025 volts. If not, perform b below. (3) Turn NULL switch to VTVM. (4) Adjust dc voltage standard for 0 (zero) indication on UUT meter. b. Adjustments (1) Turn NULL switch to VTVM. (2) Adjust dc voltage standard for 50.000 volts. (3) Turn NULL switch to 10, 1, and .1 while adjusting P3 (fig. 1) for 0 (zero) indication on UUT meter. 11. 5-Volt Range a. Performance Check (1) Turn UUT VOLTS RANGE switch to 5. (2) Adjust dc voltage standard (A2, table 1) for full-scale indication on UUT meter. (3) Turn NULL switch to 10, 1, .1 and .01 while adjusting dc voltage standard for 0 indication on UUT meter. Dc voltage standard will indicate between 4.9975 and 5.0025 volts. If not, perform b below. (4) Turn NULL switch to VTVM. (5) Adjust dc voltage standard for 0 (zero) indication on UUT meter. b. Adjustments (1) Turn NULL switch to VTVM. (2) Adjust dc voltage standard for 5.00000 volts. TB 9-6625-1866-50 10 (3) Turn NULL switch to 10, 1, .1, and .01 while adjusting P4 (fig. 1) for 0 (zero) indication on UUT meter. 12. 0.5-Volt Range a. Performance Check (1) Turn VOLTS RANGE switch to .5. (2) Adjust dc voltage standard (A2, table 1) for full-scale indication on UUT meter. (3) Turn NULL switch to 10, 1, .1, and .01 while adjusting dc voltage standard for 0 (zero) indication on UUT meter. Dc voltage standard will indicate between 0.49975 and 0.50025 volt. If not, perform b below. (4) Turn NULL switch to VTVM. (5) Adjust dc voltage standard for 0 (zero) indication on UUT meter. b. Adjustments (1) Turn NULL switch to VTVM. (2) Adjust dc voltage standard for 0.500000 volt. (3) Turn NULL switch to 10, 1, .1 and .01 while adjusting P5 (fig. 1) for 0 (zero) indication