1、rl a3 40 MIL-T-1268 1A 13 APRIL 1955 SUPERSEDING 7 MAY 1953 : MILT-12681 (Si soft (Tin, Tin- - ment). -Lead, and Lead Silver);. UU-T-111 -Tape, Paper, Gummed LLL-B-631 -Boxes ; Fiber, Corru- PPP-B-601 -Boxes, Wood, Cleated- PPP-B-676 -Boxes, Set-up; Paper- (Sealing and Securing). grated (For Domesti
2、c Shipment). Plywood. board. MILITARY JAN-P-106 -Packaging and Pack- ing For Overseas Shipment-Boxes, Wood, Mailed. MIL-B-107 . -Boxes, Wood, Wire- bound (Overseas Type). JAN-P-108 -Packaging and Pack- ing for Overseas Shipment - Boxes, Fiberboard (V-Board and W-Board) Exterior and Interior. MILP-11
3、6 -Preservation, Methods of. JAN-P-120 -Packaging and Pack- ing for Overseas ShipmentCartons, Folding, Paperboard. JAN-I?-127 . -Packaging and Pack- ing For Overseas Shipment - Tape, Adhesive, Pressure-Sensitive, Water Resistant. . MIL-B-131 -Barrier - material, water vaporproof, flexible. JAN-T-152
4、 -Treatment, Moisture and Fungus-Resistant of Communica- Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-T-12681A tions, Electronic and Associated Elec- trical Equipment: gen
5、eral process for. MIL-C-8849 -Cord, electrical (tin- sel), MIL-L-10647 -Liners, case, water- proof. M1G.P-11268 -Parts, materials, and Processes used in Signal Corps Equip- ment. 2.2 Other publications. - The following documents form R part. of this specification. Unless otherwise indicated, the iss
6、ue in effect on date of invitation for bids shall apply. Association of American Railroads Uniform Freight Classification Ratings, Rules and Regulations. (Copies. of Uniform Freight Classification, Rat- ings, Rules and Regulations may be obtained from the Association of American Railroads, 59 East V
7、an Buren Street, Chicago, Illinois.) National Motor Freight Association National Motor Freight Classification Rules niid Container Specifications for TPUC Shipments. (Copies of Classification Rules and Container Specifications foi. Truck Shipments may be obtained from the National Motor Freight Asso
8、ciation, 1424 - 16th Street, N.W., Washington 6, D. C.) U. S, ARMY 72-53 -Finishes (For Ground Signal Equipment). STANDARDS MILITARY MIL-STD-105 -Sampling Procedures and Tables for Inspection by Attri- butes. MIL-STD-129 -Marking for Ship- ment and Storage. MIL-STD-169 -Extreme Tempera- ture Cycle.
9、MIL-STD-170 -Moisture - Resistance 7 _ 2 Test Cycle for Ground Signal Equip- ment. MIL-STD-262 Wired Equipment, Classification of Visual and Mechani- cal Defects For. (Copies of specifications and standards required by contractors in connection with speciffc procurement functions should be obtained
10、from the procuring activity or as directed by the contracting oflcer. Both the title and identifying number or symbol should be stipulated when requesting copies.) 3. REQUIREMENTS 3.1 Procurement model,-The procurement model shall be the one which wo1 be available for inspection by prospective bidde
11、rs and will be lent to the contractor, in accordance with the invitation for bids. Unless otherwise specified herein or in the invitation for bids, the equipment shall conform to the following: . 3.1.1 Constmtzan.-Physical construction of the equipment shall conform to the pro- curement model. howev
12、er, exception is permitted for preliminary tinning of elec- trical connections and for tinning or solder- ing of mechanical joints not used to complete electrical circuits, but in no case shall acid or acid salts be used where they can come in contact with insulation material. Where acid or acid sal
13、ts are used, as permitted above, they shall be completely neutralized and re- moved immediately after use. Flux for solder- ing of electrical connections shall be rosin, rosin and alcohol, or rosin and turpentine. 3.7.4.3 P?-ocess.-There shall be no sharp points or rough surfaces resulting from in-
14、sufficient heating. The solder shall feather out to a thin edge, indicating proper flowing and wetting action, and shall not be crystal- lized, overheated, or underheated. The mini- mum necessary amount of flux and solder shall be used for electrical connections. Any means employed to remove an unav
15、oidable excess of flux shall not incur the risk of loose particles of flux, brush bristles, or other for- eign material remaining in the equipment ; flux being spread over a larger area; or dam- age to the equipment. Insulation material that has been subjected to heating during the soldering operati
16、on shall be undamaged and parts fastened thereto shall not have become loosened. 3.8 Workmanship.-The equipment shall be manufactured and assembled in a thoroughly workmanlike manner. In particular, solder- ing shall meet all the requirements of para- graph 3.7.4. -. - 4. QUALITY ASSURANCE PROVISION
17、S 4.1 Classiication of inspection.-Inspection shall be classified as follows: (a) Preproduction inspection. (b) Acceptance inspection. 4.2 Preproduction inspection.-Preproduc- tion inspection shall consist of the group A inspection and nondestructive group C in- spection specified in Tables II and I
18、II and the preproduction inspection specified in Table I. Other nondestructive inspection on preproduction samples may be performed to determine compliance with specified require- ment. 4.3 Acceptance inspection.-Acceptance in- spection shall consist of group A, and group C inspection as specified i
19、n 4.3.1 through 4.3.4. Group C inspection shall normally be performed on sample units that have been subjected to and met group A inspection. However, the order may be varied when the Government considers it more practical to select separate samples for group C inspec- tion. Each unit which will be
20、subjected to group A, or group C inspection shall be pre- conditioned in accordance with 4.4. 4.3.1 Group A inspection.-Group A in- spection (including sampling) shall conform to Table II and Standard MIL-STD-105. Group A inspection shall be performed in any order which is satisfactory to the Gov- e
21、rnment inspector. TABLE I. Preproduction inspection Requirements Test Inspection paragraph paragraph Temperature 3.6 4.8 4.3.2 Group C inspection.-Group C in- spection shall be as listed in Table III. 4.3.2.1 Sampling for group C.-One sam- ple from each 100 units, unless otherwise Copyright Communic
22、ations - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MILT-1268lA Test .Se%, Telephone (Teat Set TS-lw( )/U) RECEMER Bheet #6 HE, CU hU 5U99 OP EQUAL CO Copyright Communications - Electronics Command Pro
23、vided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-i. specified, shall be subjected to class C in- spection. failure and means employed to correct the fault. The record shall be presented to the Government when the product is submit
24、ted and shall become the property of the Govern- ment. TABLE II. Government group A inspection Require- ments 4.4 Bounce meconditioning - After final Visual and Visual and amined, measured, or tested shall be pre- Mechanical, Major . 4.6 1% conditioned as follows : The component, with shock mounts (
25、if any) removed or blocked, Mechanical, Minor 4.6 3% shall be Dlaced in its normal onerating. Dosi- Onerational ._._._._._ I 3.7 I 4.6.3 1 Group made by the L. A* B. c New Jersey, or equal. The package tester, shafts in phase, shall have a speed such that it is just possible to insert a i/,2-inch-th
26、ick strip of material under one corner or edge of thhp wiiinmmt to a distanr.p of 8 inches as 4.3.2.2 Noncompliance.-If 8 sample unit fails group C inspection, the contractor shall immediately investigate the cause of failure and aIfected portion of proauct to tne CiOV- minute. ernment inspector. If
27、 the Government in- spector does not consider that the corrective 4.5 Visual and mechanical inspection.- action will enable the product to meet speci- Parts and equipment shall be examined for fied requirements, or if the contractor cannot the defects listed in Standard MIL-STD-252. determine the ca
28、use of failure, the matter shall be referred to the contracting officer. 4.6 Electrical tests. 4.6.1 Cont;nu$ty test. - Continuity test shall be made on all electrical circuits. This TABLE III. Government grozc?, C inspection I- . .I -. test shall be made with the switch in both the Inspection parag
29、raph paragraph normal operating position and the depressed position. Moisture Resistance . 3.6 4.7 4.6.2 Resfstance testeThe resistance of . i. the receiver and the resistance of 50,000 ohm resistor shall be measured using a suitable low potential d.c. method for compliance with the l specified samp
30、le unm wnicn nave been subjected to and passed group C inspection, may be ac- requirements of 3.7,1. cepted on contract, provided that they are resubjected to and pass group A inspection 4.6.3 Operational test.-With Test Set TS- )/v completely assembled, the switch 190 ( after repair of all visible
31、damage. shall be given an operational test to verify that depressing the button switch on the side of the Western Electric Co. #518A tool (or equal) shorts out the resistor, 4.3.4 Disposition of nonconfomng Prod- uct. - When defective sample units OS re- . . _ - . - _ of product is submitted for acc
32、eptance, such product shall be suitably tagged or identified by equivalent means to indicate the cause of 4.7 Moisture-resistance. - The following test shall be performed on units selected for group C inspection. 7 . -I j e - Copyright Communications - Electronics Command Provided by IHS under licen
33、se with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-LZbBLA bb MIL-T-I 26818 4“. Test cotiditzotls, (a) Do not move components from the humidity chamber for measure- ments. (b) Start measurements not more than 5 minutes after power is applied to the co
34、mponents. Complete measure- ments as rapidly as possible. Do not leave power on after measurements have been completed. 4.7.2 Test proceclwe. - The components will be tested as follows : (a) Dry at 130 =r: 5F. for 24 hours. (b) Condition at 77“ f 5OF. and 40 to 50 percent relative humidity for 24 ho
35、urs. (c) Take measurements as specified in 4.0 readjust or realine as necessary to meet full specification require- ment s, (ci) Subject to continuous cycling for 6 of the 48-hour cycles. Temperature, relative humidity, and period of time for each portion of the cycle shall conform to MIGSTD-170 (Si
36、g C) . The measurements speci- fied in 4.8 shall be made during the periods shown on the drawing. (e) After cycling has been completed, condition the components for 24 hours at 77“ -f SOF, and 40 to 60 percent relative humidity. Then ad- just for optimum performance, us- ing only those means provide
37、d by the components. No repair or re- placement of parts shall be made. After adjustment, the components shall meet full specification require- ments for those measurements spec- ified in 4.3. 4,s Temperature,-The equpiment shall be subjected to the temperature cycle shown on MIL-STD-169 (Sig C) , T
38、ests shall be made in accordance with 4.6 during steps 4 and 10. 8 . - - There shall be no degradation in performance from that shown prior to the temperature tests. 5. PREPARATION POR DELIVERY 5.1 Preservation and packaging, 5.1.1 Domestic .immedtte me.-Test Set TS-190( )/U shall be packaged for sh
39、ip- ment in conformance with the requirements of Uniform Freight Classification, Ratings, Rules and Regulations for Rail Shipments, National Motor Freight Classification Rules and Container Specifications for Truck Ship- ments, Parcel Post Regulations, and the regulations of other carriers as applic
40、able to the mode of transportation. 5.1.2 Domestzc Limited storage.-Preserve and package Test Set TS-190( )/U in ac- cordance with procedures specified for the designated method as prescribed in Specifica- tion MIL-P-116, and further described in the following paragraphs : 5.1.2.1 Test Set TS-190( )
41、/U. - Package each test set Method IA-8 as follows: Wind cords into a coil of proportionate dimensions. Tie in three places with cotton tape, securing plugs and headsets to coil with ties. Cushion each test set by wrapping with flexible cor- rugated paper, Secure the wrapping with gummed paper tape,
42、 conforming to Speci- fication UU-T-111. Inclose each cushioned item within a close fitting bag fabricated of water-vapor proof barrier material conform- ing to the requirements of MIL-B-131, class 2. 5.1.2.2 Intermedide package. - Place a quantity of test sets, packaged as specified in 5.1.2.1, bea
43、ring the same stock number, within a close fitting folding carton or set up box conforming to Specification JAN-P-120 or PPP-B-676, respectively. The gross weight of intermediate packages shall not exceed 5 pounds. Fill all voids with flexible corrugated paper to prevent movement. Seal Copyright Com
44、munications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MLT-12681A box closure with gummed paper tape, con- forming to Specification UU-T-111. 5.2.3.1 Shipping containers shall be strap- ped in confor
45、mance with the appendix of the applicable container specification onlg for direct shipment to ports. 5.1.3- Military overseas. - Preserve and package Test Set TS-190 ( )/U as described in 5.1.2 5.3 Marking. 5.2 Packing. 5.2.1 Domestic, immediate me.-Test Set TS-190( )/U shall be packed for ship- men
46、t in conformance with the requirements )f Uniform Freight Classification Rules and Jontainer Specifications for Rail Shipment, ,Tationa1 Motor Freight Classification Rules and Container Specifications for Truck Ship- ments, Parcel Post Regulations or other car- rier regulations as applicable to mode
47、 of transportation. . 5.3.1 Marking for shipmefit. - Interior packages and exterior shipping containers shall be marked in accordance with the ap- plicable provisions of Standard MIL-STD- 129. 6. NOTES 6.1 Intended use.-Test Set TS-190( )/U is used to locate faults on telephone and telegraph equipme
48、nt. 6.2 Ordering data. - Procurement docu- (a) Title, number, and date of this specification and any amendmen thereto. 5.2.2 Domestic, limited storage.-Test Set TS-190 ( )/U shall be packed in wood cleated fiberboard, wood cleated plywood, nailed wood, corrugated fiberboard or wirebound boxes confor
49、ming to Specifications NN-B- ments should specify the following : 591, PPP-B-601, NN-B-621, LLL-B-631 or NN-B-631. The shipping container shall fit the contents snugly. Gross weight shall not exceed 65 pounds for fiberboard boxes and 200 pounds for plywood or wood boxes. Clo- sure shall be made in accordance with the applicable box specification. 5.2.3 Military overseas.-Test Set TS-190 ( )/U packaged as specified in 5.1.3 shall be packed in wood-c
