HP 431B Calibration Procedure

Also see for 431B: Operating and service manual

PIN: 010318-002TB 9-6625-086-35Change 2DEPARTMENT OF THE ARMY TECHNICAL BULLETINCALIBRATION PROCEDURE FORPOWER METER, HEWLETT-PACKARD,MODELS 431B AND 431C (AN/USM-260)Headquarters, Department of the Army, Washington, DC2 August 1985TB 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“Commander, US ArmyTMDE Support Group, ATTN: AMXTM-LPP, Redstone Arsenal, AL 35898-5400.”Page 7, paragraph 12a(2) is superseded as follows;(2) Set resistance decade (A7) to 10 kΩ. This 10 kΩ value can be decreased asnecessary to obtain full-scale indication on TI.Page 9, paragraph 15b is superseded as follows:b. When all parameters are within tolerance, annotate and affix DA Label 80 (USArmy Calibration Instrument). When the TI receives limited or special calibration,annotate and affix DA Label 163 (US Army Limited or Special Calibration). When the TIcannot be adjusted within tolerance, repair the TI in accordance with the maintenancemanual. When repair is delayed for any reason or the TI cannot be repaired with localresources, annotate and affix DA Form 2417 (US Army Calibration System RejectedInstrument) 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 ArmyChief of StaffOfficial:DON J. DELANDROBrigadier General, United States ArmyThe Adjutant GeneralDistribution:To be distributed in accordance with DA Form 12-34C, Block No. 319, requirements forcalibration publications.US GOVERNMENT PRINTING OFFICE: 1985 - - 544-007/20156 Region #4