1、 P MILIT 10 September i970 Superseding MIL-F-8ll54( Wep) 4 Cepteniber 1964 RY SPECIFICATION (NAVORD Dwg 1563732) 37 MODS O, 2, and 3) This specification has been approved by the Naval Ordnance Systems Command, Department of the Navy 1. SCOPE 1.1 This specification establishes the requirements for th
2、e procure- ment of a Lowpass Filter, NAVORD Drawing 1.563732, which is used in the enabler assenibly of an acoustic panel. . 2. APPLICABDOCUMENTS 2.1 The following documents of the issue in effect on date of invita- tion for bids or request for proposals form a prt of this specification to the exten
3、t specified herein. SPECIFICATIONS Federal pm-621 Box, Wood, Nailed and Lock-corner Military MIL-R-11 Resistors, Fixed; Composition (In- sulated) , Genera Specification for m-P-i16 Preservation, Methods of Environmental Requirements and Tests (For Torpdo Mk 37 Components and As ses, Skids, Runners,
4、or Pallet-me Base MIL-STD-202 Test Methods for Electronic and Electrical Component Parts DRAliINGS Naval Ordnance Systems Command NAVORD DWG i563732 Filter, Lowpass (Copies of specifications, standmds, drawings, and publications re- quested by the contractor in connection with specific procurement f
5、mc- tions should be obtained *om the procuring activity or as directed by the contracting officer.) . 2.2 Other publications. The followitg documents form a part of this specification to the extent specified herein, the issue in effect on date of invitation for bids or request for proposals shall ap
6、ply. . Unless otherwise indicated, - NATIONAL BUREAU OF S“DfiEIDS PLTBLICATIONS Handbook 28 Screw Thread Standards for Federal Services (Application for copies should be addressed to the Superintendent of Documents, Government Printing Office, Washington, Do Ce 20402. ) UNIW SCATES OF AMERICA STANDA
7、RDS INEXFITUTE ums 132.2 1967 Graphic syaibols for Electrical and Electronics Diagrams (Application for copies should be addressed to DOD Single Stock Point, U, S. Naval Supply Depot, Philadelphia, Pennsylvania 19120, ) 30 mQmms 3.1 Description. The lowpass filter is a plug-in electronic assely comp
8、osed of resistors and capacitors which are contained in a sealed metal 2 Licensed by Information Handling Services-5 -_- _ _ _. - MIL-F-81154A( OS) container. Its purpose is to pass a narrow band of low frequencies to the next stage while rejecting or shunting to ground al1 other frequencies ap- pli
9、ed to its input terminais. 3.2 General requirements 3.2.1 Data required. . No ata is required by this specification (other than reports accompanying samples submitted for preproduction and periodic production testing), or by applicable doc mess specified in the contract or orderysee 6.2), 3.2.2 Frep
10、roduction sample. Unless otherwise specified in the contract or order, preproduction saples of the lowpass filter shall be manufactured using the methods and procedures proposed for the production loto units shall be tested as specified in Section 4 herein and are for the purpose of determining, pri
11、or to starting productioa, that the contractors production methods me capable of producing lowpass filters that comply with the technical requirements of the contract. 3.2.3 Materials. Uilless otherwise specifie,d in the contract, requisi- tion or order, all materials and purchased pasts entering in
12、to the final assembly of the lowpass filter shall conform strictly to the detailed re- quirements indicated on the applicable drawings, specifications, and pub- lications listed in NAVORD Dwg 1563732. 3.2.4 Surface treatment, construction, arid dimensions. Surface treat- ment, construction, an dimen
13、sions for the lowpass filter shall be in ac- cordance with the applicable drawings, specifications, and publications listed in NAVORD Dwg 1563732. ents referenced in Section 2, These See 4.3.1. * 3.2.5 Moisture, fungus, and corrosion. .The lowpass fflter shall be rendered moisture, fungus, and corro
14、sion resistant in accordance with detail requirements specified on the.drawings and specificat2ons listed in MVORD Dwg 1563732. 3.2.6 Marking. Marking of assemblies, subasseniblies and parts shall be in accordance with applicable drawings listed in NAVORD Dwg 1.563732. 3.2.7 Threadsr Unless otherwis
15、e specified, all threads shall be in accordance with National Bureau of Standads Handbook 128. fit for threads shall be as specified on the applicable drawings. Ifhe class or 3.2.8 Conflicting requirements. Conflicting requirements arising be- tween this specification or any specifications, publicat
16、ions, or drawings listed herein shall be referred in writing to the procuring agency or ap- pointed agent for interpretation, clarification, an resolution (or cor- rection) . Licensed by Information Handling ServicesNIL-F-S11j4A( OS) 3.3 symbols. Interpret schematic diagram symbols in accordance wit
17、h USAS 32.2. 3.4 Performance requirements an product characteristics. The lowpass filter shall meet the following performnce requirements and product.char- acteristics: i 3.4.1 All pin designations referred to in this specification are shown on NAVORD Dwg 1.563732. 3.4.2 Open circuit attenuation cha
18、racteristics. The lowpass filter shall have the following attenuation characteristics when tested as spec- Ified in 4.4,4.2 of this Specification, shall be referred to the response at 20 Hertz (Hz). In all cases, the attenuation 3.4.2.1 3.4.2.2 The attenuation of lo5 Hz shall be 12 plus or minus 0.5
19、 db, 3.4.2.3 The attenuation of 400 Hz shall be at least 30 db. 3.4.3 Out ut balance. The attenuation of 55 Hz shall be 6 plus or minus 0.5 ab. The lowpass filter output shaU be 0.6 volt direct current -E7-7- vdc maximum, when measured as specified in 4.4.4.3 of this specification. 3.4.4 Direct curr
20、ent resistance. The direct current resistance be- tween pins 4 and 5, and pins 4 and 6 shall be 750,000 ohms plus or minus 0.1 percent, when measured as specified in 4.4.4.4, 3.4.5 Dielectric strength. The lowpass filter shall withstand the specified potentials without breakdown, puncturing of insul
21、ation, or arcing, .when tested as specified in 4.4.4.5. 3.4,5.1 The dielectric test voltage between any two mutually inskated terminals shall be 300 vdc for a period of one minute. 3.4.5.2 The dielectric test voltage between any terminal and case shall be 200 vdc for a period of one minute. 3.406 In
22、sulation resistance. The loqass filter shall meet the minimm insulation resistance requirements when tested as specified in 4.4.4.6, The insulation resistance between any two mutually insulated 3.4,6,1 terminals shall be 10,000 inegohms minimum. 3.4.6.2 The insulation resistance between any terminal
23、 and the filter case shall be 10,000 megohms minimum. 4 Licensed by Information Handling ServicesMIL-F-81154A( OS) 34.7 Operating life. The operating life of the lowpass filter, when tested as specified in 4.5.5, shall be at least 800 cycles of operation. . 3.5 Environmental requirements. The lowpas
24、s filter shall meet the other applicable requirements of this specification during or after the tests defined or specified in 4.5. - 3.5.1 Vibration. The lowpass filter shall meet the following vibration requirements : 3.5.1.1 Vibration, nonoperating. The lowpass filter shall show no damage and shal
25、l meet all Lhe performance requirements and product characteristics of this -specification after being tested as in b.5.l.2. and shall meet d1 the performance reQuirements and product characteris- tics of this specification during and after the test specified in 4.5.1.3. damage and shall meet al1 th
26、e performance requirements and product char- acteristics of this specification after being tested as in 4.5.1.4, 3.5.1.2 Vibration, operating. The lowpass filter shall show no damage 3.5.1.3 Vibration, transportation. The lowpass filter shall show no 3.5.2 Shock, Lransportation. The lowpass filter s
27、hall show no damage and shall meet al1 the performance requirements and product characteris- tics of this specification after being tested as in 4.5.2. 3.5.3 Temperature and humidity 3.5.3.1 Eigh temperature and humidity, nonoperating. The lowpass filter shall show no damage and shall meet al1 the p
28、erformance requirements and product characteristics of this specification after being tested as in 4.5.3.1. 3.5.3.2 High temperature, operating. The lowpass filker shall be cap- able of meeting all the performance requirements of this specification while undergoing the test specified in 4.5.3.2. 3.5
29、.3.3 Low temperature, nonoperating. all the performance requirements and product characteristics of this spec- ification after being tested as in 4.5.3.3. able of meeting all the performance requirements of this specification while undergoing the test specified in 4.5.3.4. The lowpass filter shall m
30、eet 3.5.3.4 Low temperature, operating. The lowpass filter shall be cap- 5 Licensed by Information Handling ServicesIrIIL-F-81154A( OS) r. 3.5.4Imersion. The lowpass filter shall show no evidence of leakage during the immersion test specified in 4.5.4 and thereafter shall meet the performance and pr
31、oduct requirements of this specification. - 3.6 Cleanup. Prior to and after fina assey XL parts, components and the assealy shall be thoroughly cleaned of loosej spattered, or ex- .cess solder, metal chips, and other foreign matter. as well as excessive rosin flash shall be removed. Burrs and sharp
32、edges 3.7 Worknanshi. The lowpass filter, including all parts and acces- sories, shall be constructed and finished in a manner to ensure compliance with al1 requirements of this specification. be paid.to neatness and thoroughness of soldering, wiring, impregnation of coils, =king of parts and assedl
33、ies, plating, painting, sliveting, machine screw assealage, welding, brazing, and freedom of parts from burrs and sharp edges. ParticUlm attention shall - 3.7.1 The standards of workmanship exhibited in any approved prepro- duction sample, subject to any qualification stated in the Governments notic
34、e of approval, shall be determinative of the requirements of the con- tract relative to workmanship insofas as not specifically covered by applic- able specifications. 4. QUALITY AS-CE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the sup
35、plier is responsible for the .perform- ance of all inspection requirements as specified herein. wise specified in the contract or order, the swplier may use his own or any other facilities suitable for the performance of the inspection re- quirements specified herein, unless disapproved by the Gover
36、nment. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to as- sure supplies and services- conform to prescribed requirements. Ekcept as other- 4.2 Classification or inspections. Inspection of the lowpass f
37、ilter shall be classified as follows: 6 (a) Preproduction inspection (paragraph 4.5.) . (b) Qudlity conformance inspection (paragraph 4.4) Licensed by Information Handling Services._ . _._. . . . - _. 33 c. .- . . - .-.- I. MIL-F-8L354A 33 7779906 0358773 4 I . - - ._-_p p _ MIL-F-8U54A( OS) (c) Per
38、iodic production inspection (paragraph 4,5) . 4.3 Sampling 4.3.1 Preproduction. A preproduction sample of five lowpass filters, mazmfactured in accordance with 3.2.2, sha31 be subjected to the prepro- duction tests detailed in 4.5, at an activity designated by the procur- ing activity. Acceptance of
39、 the preproduction sample shall be based on no defects in the sangle. Further production of the lowpass filter by the supplier, prior to the approval of the preproduction sample, shall be at the suppliers risk. each shipment of units of poduc3 shali be a separate “inspection lot“ and may differ fYom
40、the qwtity specified in the total order or contract. In IIY event, all units of a single “inspection lot“ shall be made to the same design, With the same mterials and manufacturing techniques, and shall be part of one continuous production run. $.3,2 Lot size, Unless otherwise specified in the contr
41、act or order, . 4.3.3 Perioic production samples. 4.4.3.1. 5 Voltmeter, dc. Senior Voltohm-yst, RCA WV-97A or equivalent. 4.4.3.1.6 Battery, dry. 4.4.3.io7 Insulation tester. Radio frequency laboratories 84C or equiva- Capable of furnishing 300 vdc plus or minus 1 percent for load variations up to o
42、ne milliampere. lent. 4.4.3.1.8 Resistance bridge capable of measuring 759,000 ohms to 0.1 percent formance tests of the lowpass filter, be conducted with the test equipment of 4.4.3 and the test circuits con- tained in this specification. described in the following paragraphs: 4.4.4 Test procedure.
43、 The following tests constitute the quality con- 4.4.4.1 Unless otherwise specified, all quality conformance tests shall The test circuits shall be connected as 4,4,4.2 To measure open-circuit attenuation characteristics as set forth in 3.4.2: 4.4,4.2.1 Preparation for measurements. Connect the lowp
44、ass filter as shown in Figure 1, ensuring that the growid terminals of the follotring test equipment are connected to Point G: Licensed by Information Handling ServicesMIL-F-81154A( OS) .- (a) Audio oscillator (4.4.3.1.1) (b) Electronic counter (4.4.3,i.2) (c) Multimeter (4.4.3.3) . Careful placemen
45、t of the leads is necessary to prevent pickup. 4.4.4.2.2 Set the. oscillator IMPEDANCE switch to the 5OOO-ohm position. 4.4.4.2.3 4.4.4.2.4 Check the calibration of the counter in accordance with the 4.4.4.2. ihen the counter has been satisfactorily checked, set the Set the oscillator LOAD switch to
46、 ON. instructions povided . counter controls to measure frequency. 4.4.4.2.6 Connect the oscillator and comber to Point A of Figure 1. 4.4.4.2.7 Connect the multimeter probe to Point C of Figure 1. 4.4.4.2.8 Adjust the oscillator eequency until the counter indicates a frequency of 20 plus or minus 1
47、 Hz; then adjust the oscillator AMPLITUTE control for a voltage that 5s at least 30 db above the minimum voltage than can be indicated on the multimeter. 4.4.4.2.9 Record the voltage indicated on the multimeter. 4.4.4.2.10 Remove the multimeter probe from Point C and connect it to Point A. 4.4.4.2.1
48、1 Record the voltage indicated on the multimeter. . 4.4,4.2.l2 Adjust the oscillator frequency until the counter indicates a frequency or 55 plus or minus 1 Hz, then adjust the oscillator AMPLITUDE control until the multimeter indicates within 0.1 db the voltage recorded in 4.4,4.2.11. 4.4.4.2.13 Re
49、move the multimeter probe from Point A and connect it to Point C. 0.5 db below the voltage recorded in 4.4.4.2,9. The voltage indicated on the multimeter shall be 6 plus or minus 4.4.4.2.14 Remove the multimeter probe from Point C and connect it to Point A. 9 - _- -_ I f- , i .; y_ - - _ - .- - - .- _ -_ .1 Licensed by Information Handling ServicesL . -=y MIL-F-81154A-13 B b 035877L1 T 3 - - - iaL-81154A( OS) 4.4,4.2,15 Adjust the oscillator frequency until the counter indicates a frequenc
