1、 however, this inspection shall be invoked only by direction of the procuring activity. Sample units which have been subjected to group C inspection shall not be delivered on the contract or order. Noncompliance: if a sample fails to pass groupC inspection, the supplier shall take corrective action
2、on the materials or processes, or both, as warranted, on all units of product which can be corrected and which were manufactured under essentially the same conditions, with essentially the same materials, processes, etc, and which are considered subject to the same failure. Acceptance of the product
3、 shall be discontinued until corrective action, acceptable to the procuring activity, has been taken. After the cor- rective action has been taken, group C inspection shall be repeated on additional sample units (all inspec- tion, or the inspection which the original sample failed, at the option of
4、the procuring activity). Groups A and B inspection may be reinstituted: final acceptance shall be withheld until the group C reinspection has shown that the corrective action was successful. in the event of failure after reinspection, informa- tion concerning the failure and the corrective action ta
5、ken shall be furnished to the procuring activity. Retention of Qualification: In order to retain qualification, the manufacturer shall forward to the procur- ing activity a summary of the results of groups A and B tests indicating a_ a minimum the number of lots which passed and the number which fai
6、led, and a summary of the results of group C tests, including the number and type of any part failures. The summary shall include those tests performed during that past 6 month interval. if the summary of the test results indicates nonconformance with specification require- ments, action may be take
7、n to remove the failing product from the QPL. Failure to submit the summary may result in loss of qualification for that product. in addition to the periodic submission of data, the supplier shall immediately notify the procuring activity that inspection data indicates failure of the quali- fied pro
8、duct to meet the requirements of the specification. -9- IARP 1172 TABLE IV. QUALIFICATION INSPECTION Examination or Test Flashpoint of impregnant or potting compound Group i Visual 11-16 16-22 22-32 32-41 41-55 55- 73 73- 10 1 101-135 135-181 181-21 1 Wire Size (AWG) 24 22 20 18 16 14 12 10 8 6 4 2
9、1 Fi 1 ter + Figure 2. Method B Mounting Configuration OIRP 1172 4.6.2.5 insulation Resistance (terminal-to-ground): Filters shall be tested in accordance with method 302 of MIL-STD 202, The following details shall apply: - 14 - A. Test condition letter A. % Rated B. Measurements shall be carefully
10、made to prevent damage to the filter seal, When filters fail this test due to ambient relative humidity in excess of SO%, they may be retested at any relative humidity from 20 to 50 percent. 1 Load A C. Points of measurement shall be between case (ground) and all live (not grounded) terminals of the
11、 same circuit con- nected together. 4.6.2.6 Voltage Drop: following requirements: Voltage drop, AC and/or DC as applicable, shall be measured in accordance with the AC Filters - Voltage drop is the difference between the input voltage to the filter and the output voltage of the filter when the filte
12、r is carrying rated current and rated voltage, with a resistive load, at nominal rated frequency. The method of voltage measurement is shown in Figure 3. Measure- ments shall be made by using expanded scale meters which will enable voltage differences of less than 1 volt to be read. DC Filters - The
13、 voltage drop shall be determined in accordance with Figure 4. Measurements shall be made by using a dc reading meter. V, - V2 = voltage drop Figure 3, Measurement of ACVoltage Drop -1 I I t Fi 1 ter -* - Sect ion Var I ab 1 e 6 AC Supply Figure 4. Measurement of DC Voltage Drop .- _ I ARP 1172 4.6.
14、2. i Insertion-Loss: Filters shall be tested under rated load in accordance with MIL-STD-220, except that aclapters may be modified to fit the particular style of the filter. Measureinents shall be taken at a sufficient number of frequencies to plot a curve of insertion-loss versus frequency, accura
15、te to within i - 3 decibels (dB) over the specified frequency range. 4. U. 2.8 Ckerload: Filters shall be suspended by their conductors in free air at an ambient temperature of 20 C inininiuiii. A current equal to 140%, of rated current at nominal rated frequency shall then be ap- plied for 15 niinu
16、tes. After the filter has returned to room temperature. the insulation resistance and voltage drop shall be measured as specified in 4.6.2.5 and 4.6.2.6 respectively. Filters will be visually examined for evidence of physical damage. Iii the event that suspensioii by their conductors is impractical
17、due to size, weight, configuration, or terniinal arraigeineiit! the mounting procedure of 4.6.2.3 (B) may be employed. 4.6. 3 Eiiviraimientnl: 4.6. U. 1 Baroiiietric Pressure (reduced): BIIL-STD-208. The following details shall apply: Filters shall be tested in accordance with method 105 of A. Filte
18、rs shall be securely fastened by normal mounting means. B. Test condition letter B shall be used. - C. Testing foi dielectric withstanding voltage shall be accomplished while subjected to reduced pressure, except that the test voltage shall be 12576 of the rated voltage. D. Filters shall be examined
19、 for evidence of flashover, breakdovm? or impairment which would cause failure. This test shall be accomplished after subjection to .re- duced pressure. 4. U. 3.2 Salt Spray: details ancl exception shall apply: Filters shall be tested in accordance with inethod 101 of MIL-STD-202. The following A. U
20、nless otherwise noted by the control specification, test condition B shall be used. E. After test the filters shall be visually examined for cor- rosion and obliteratioii of marking. 4. i:. 3.3 Teiiiperature mcl linniersion Cycling: cedures: Filters shall be tested in accordance with the folloying p
21、ro- A. Temperature cycling - Filters shall be tested in accordance with method 102, test condition D, of RIIL-STD-202. No measure- iileiits sliall be made after temperature cycling. 13. Immersion cycling - Following temperature cycling, filters shall be tested in accordance with method 104, test con
22、dition A, of MIL-STD-202. After the final cycle dielectric withstanding volt- age with 907; of the voltage specified in 4.6.2.4, shall be applied for 5 5 1 second, insulation resistance and insertion loss (check test) tests perforiiiecl as spccifiwi iii I. 6.2.5 and 4.6.2.7. Filters shall be visuall
23、y exnmirkd for corrosion and obliteration of inaiking. SAE ARP*1172 72 M 8357340 0025106 4 M ARP 1172 I - 16 - 4.6.3.4 Shock - Medium Impact: Filters shall be tested in accordance with method 205, test conditions A and C, of MIL-STD-202. The following details shall apply: A. Filters shall be securel
24、y fastened by normal mounting means. When applicable, leads and connecting wires must be supported to prevent damage to the filter. B. During the test a potential 100% of rated voltage shall be applied between terminals and case. C. After compIetion of the test the units shall be subjected to an ins
25、ertion-loss check test. 4.6.3.5 Vibration: range specified by the control specification. Levels and test methods shall be as shown in Table XI. The following details shall apply: Filters shall be tested for vibration levels commensurate with the vibration frequency A. Filters shall be securely attac
26、hed by their normal mounting means. B. Rated voltage and current shall be applied continuously during the test. Attached instrumentation shall be such as to indicate intermittent open or short circuiting. C. Filters shall be examined for evidence of physical damage upon completion of the test. TABLE
27、 XI. VIBRATION TESTS Frequency Range Test Method Duration of Test 10 - 55 cps 10 - 500 cps 10 - 2000 cps MS-202, method 201 MS-202, method 204 (A) MS-202, method 204 (B) 3 hours 9 hours 12 hours 4.6.3.6 Moisture Resistance: Filters shall be tested in accordance with method 102, test condition D, of
28、MIL-STD-202, except that no measurements shall be made before and after cycling. Filters shall then be tested in accordance with method 106 of MIL-STD-202. The following details and exceptions shall apply: A. Mounting - Securely fastened by normal mounting means. B. Initial measurements - Not applic
29、able. C. Polarization voltage - During steps 1 to 6, inclusive, a DC potential of 100 volts, or 100% rated voltage, which.ever is less, shall be applied between the terminals and case. The potential applied to the terminals shall be positive with re- spect to the case. D. Final measurements - Follow
30、ing the 24 hour conditioning period, dielectric withstanding voltage with 90% of the volt- age specified in 4.6.2.4, shall be applied for 5 5 1 second, and insulation resistance and insertion loss (check test) measurements performed as specified in 4,6.2.5 and 4.6.2.7 respectively. After the test fi
31、lters shall be examined for corrosion and obliteration of marking. I - 17 - IARP 1172 4.6.3. 4.6.3.8 Seal: Filters shall be tested in accordance with method 112, test Condition A, of MIL-STD-202. - Life: following details and exceptions shall apply: Filters shall be tested iii accordance with method
32、 108, test condition B, of MIL-STD-202. The A. E. C. n. E. F. Filters shall be separated from each other by a distance of not less than one inch during measurements. Filters shall be operated at maxiiriiiin operating temperature and energized with rated current at their nominal rated fre- quency. Fi
33、lters shall be suspended by their terminals during the test. If size weight: configuration or terminal arrangement pre- cludes such suspension, they may be mounted as described in 4.6.2.3 (B). During the test, radiant shields may be pIaced between units so that overheating- of one unit will not affe
34、ct a nearby unit. When both AC and DC voltage ratings are given, the AC voltage shall be used. The life test voltage shall be 1.2 times the rated AC voltage. Filters with only DC ratings shall be tested at 1.4 times the rated DC voltages. After the life test, dielectric withstanding voltage with 90%
35、 of the specified voltage applied for 5 +_ 1 seconds, and insulation resist- ance, and insertion loss (check test) shall be measured as speci- fied in 4.6.2.4, 4.6.2.5, and 4.6.2.7 respectively 5. PRRPARATIOH FOR DELIVERY 5. i Government Procurement: 5.1.1 Preseivntioii and Packaginq: Preservation a
36、nd packaging shall be level A or C as specified. Level A - Filters shall be cleaned in accordance with MIL-P-116, process C-l. The drying procedure shall not be injurious to the item. No preserva- tive application is required. Filters shall be adequately cushioned and individually packaged in accord
37、ance with MIL-P-116, method 1A8. Filters so packaged shall be placed in intermediate containers conforming to PPP-B-566 or PPP-B-676. Intermediate containers shall be uniform in size and shape, shall be of minimum cube and tare, and shall contain multiples of five unit packages, not to exceed 100 pa
38、ckages or 10 pounds. No intermediate packaging is required when the total quantity shipped is less than 100 units or less than two intermediate packages, as practical. Level 6 - Filters shall be preseived and packaged in a manner that will afford ade- quate protection against corrosion, deterioratio
39、n, and physical damage during shipment from supply source to the first receiving activity for im- mediate use. This package may conform to the supplier commercial practice for retail distribution when such meets the requirements of this level. SAE ARPmIL72 72 83573LtO 0025308 8 I ARP 1172 - 18 - 7 I
40、 I o. 1.2 packin% Packing shall be level A, B, or C, as specified. Level A - The packaged item(s) shall be packed in fiberboard containers conforming to PPP-B-636, weather resistant, style optional, special requirement. In lieu of the closure and waterproof requirements, closures and waterproof- ing
41、 shall be accomplished by sealing the center seams, ends, edges, and manufacturers joints with waterproof tape, 3 inches wide, conforming to PPP-T-60. Banding (reinforcement requirements), excluding metal, shall be applied in accordance with method 1 of the Appendix to PPP-B-636. I Level B - The pac
42、kaged item(s) shall be packed in fiberboard containers conforming to PPP-B-636, class domestic, style and use requirements optional. Level C - The packaged item(s) shall be packed in a manner that will afford adequate protection against damage during direct shipment from the supply source to the fir
43、st receiving activity for immediate use. This pack shall conform to the applicable carrier rules and regulations and may be the suppliers com- mercial practice when such conforms to the requirements of this level. Level A, B, C exterior containers shall be of a minimum tare and cube consistent with
44、the protection required and shall contain equal quantities of identical items to the greatest extent possible. in addition to any special marking required by the contract or order, each unit package, inter- mediate and exterior containers shall be marked in accordance with MIL-STD-129. 5.1.3 Inspect
45、ion of Preparation for Delivery: ance with MIL-P-116 to verify conformance with the requirements of 5.1.1 and 5.1.2. Sample items and packs shall be selected and inspected in accord- 5.2 Commercial Procurement: and shall conform to the applicable carrier rules and regulations. Packing and packaging
46、shall be in accordance with best commercial practice 6. PROCUREMENT CONTROL SPECIFICATION The procurement control specification shall be the governing document concerning form, fit, and function, of filters procured to this specification. As a minimum, it shall contain the following information: A.
47、B. Procuring activity and address C. D. Title, number and date of this specification Voltage, current and frequency ratings Electrical configuration and number of sections E. Maximum or mnimum capacitance values (may be deleted if item G is presented) F. Maximum or minimum inductance values (may be
48、deleted if item G is presented) G. H. Nominal core permeability I. J. Terminal type Minimum insertion-loss requirements in a 50 ohm system Mechanical outline and mounting dimensions (include tolerances) - 19 - IARP 1172 K. Maximum weight L. Filter marking and location of same RI. Maximum operating t
49、emperature range N. O. P. Q. R. S. T. u. v. W. Ti. Altitude Maximum temperature rise (25 C unless otherwise specified) Type of impregnant and/or flashpoint (flashpoint will be per Table II unless otherwise specified) Insulation resistance at 25 c (- at maximum operating temperature may be included as an option) Maximum voltage drop at rated current Overload requirement (percent of rated current) and time duration Duty cycle Terminal Pull Vibration and shock requirements Spec ia1 environmental restrictions Levels of preservation, packaging, and packing if necessary. PREPARED BY
