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Change 2 DEPARTMENT OF THE ARMY TECHNICAL BULLETIN CALIBRATION PROCEDURE FOR POWER METER, HEWLETT-PACKARD, MODELS 431B AND 431C (AN/USM-260) Headquarters, Department of the Army, Washington, DC 2 August 1985 TB 9-6625-086-35, 12 December 1975, is changed as follows: Page 1, paragraph 2. In lines 4 and 5, change "TM 38-750" to read "750-25." Paragraph 3. In lines 7 and 8, changes address to read "Commander, US Army TMDE Support Group, ATTN: AMXTM-LPP, Redstone Arsenal, AL 35898-5400." Page 7, paragraph 12a(2) is superseded as follows; (2) Set resistance decade (A7) to 10 k. This 10 k value can be decreased as necessary to obtain full-scale indication on TI. Page 9, paragraph 15b is superseded as follows: b. When all parameters are within tolerance, annotate and affix DA Label 80 (US Army Calibration Instrument). When the TI receives limited or special calibration, annotate and affix DA Label 163 (US Army Limited or Special Calibration). When the TI cannot be adjusted within tolerance, repair the TI in accordance with the maintenance manual. When repair is delayed for any reason or the TI cannot be repaired with local resources, annotate and affix DA Form 2417 (US Army Calibration System Rejected Instrument) and inform the owner/user accordingly in accordance with TB 750-25. By Order of the Secretary of the Army: JOHN A. WICKHAM, JR. General, United States Army Chief of Staff Official: DON J. DELANDRO Brigadier General, United States Army The Adjutant General Distribution: To be distributed in accordance with DA Form 12-34C, Block No. 319, requirements for calibration publications. US GOVERNMENT PRINTING OFFICE: 1985 - - 544-007/20156 Region #4 TB 9-6625-086-35 PIN: 010318-002 TB 9-6625-086-35 Change 1 DEPARTMENT OF THE ARMY TECHNICAL BULLETIN CALIBRATION PROCEDURE FOR POWER METER, HEWLETT-PACKARD MODELS 431B AND 431C (AN/USM-260) Headquarters, Department of the Army, Washington, DC 29 August 1977 TB 9-6625-086-35, 12 December 1975, is changed as follows: Page 5, paragraph 10a(3) is superseded as follows: (3) Position the TI RANGE switch to the .01 MW position and adjust the zero controls for 0.00 V dc on the dc voltmeter. Page 8, figure 4 is superseded as follows: Figure 4. Range and tracking check without power meter calibrator. By Order of the Secretary of the Army: BERNARD W. ROGERS General, United States Army Chief of Staff Official: PAUL T. SMITH Major General, United States Army The Adjutant General Distribution: To be distributed in accordance with DA Form 12-34A, Requirements for Calibration Procedures. U.S. GOVERNMENT PRINTING OFFICE: 1977-765010/180 PIN NO: 010318-001 TB 9-6625-086-35 DEPARTMENT OF THE ARMY TECHNICAL BULLETIN CALIBRATION PROCEDURE FOR POWER METER, HEWLETT-PACKARD MODELS 431B AND 431C (AN/USM-260) Headquarters, Department of the Army, Washington, DC 12 December 1975 REPORTING OF ERRORS You can help improve this publication by calling attention to errors and by recommending improvements and stating your reasons