1、MIL-I-LSb7bK b3 m 9999706 023b97b 5 m MIL-I-l5676K(SH) 20 December 1982 SUPERSEDING MIL-I-l5676J(SHIPS) 21 June 1968 (See 6.6) MILITARY SPECIFICATION INDICATORS, SHIPS COURSE This specification is approved or use by the Naval Sea Systems Command, Department of the Navy, and is available for use by a
2、ll Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers ships course indicators, 60 or 400 hertz (Hz) used to indicate the master gyrocompass headings in various locations throughout Naval ships. 1.2 Classification. The specified (see 6.2.1): Type A -
3、1X Type B - 1X and 36X Type E - 1X and 36X Type F - 1A and 36X Type G - 1X Type H - 1X Type K - Miniature Type L - Miniature Type M - 1X IX indicators shall be of the following types, as 1 or 36 “Input speed“ (IX or 36X) 400 Hz, single dial, bulkhead mounted with 6-inch 400 Hz, single dial , bearing
4、. 400 Hz, double dial, concentric steering. 400 Hz , double dial, concentric steering (console dial. mounted). 60 Hz , double dial, course to-steer. 60 Hz, double dial, course to-steer (console 60 Hz, single dial, bulkhead mounted. 60 or 400 Hz, as specified (see 6.2.11, single mounted ) . dial, uni
5、versally mounted. 400 Hz, single dial, bulkhead mounted with 11-inch dial. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document shall be addressed to: Commander, Naval Sea Systems Command, SEA 5523, Department of the Navy,
6、Washington, DC 20362 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. FSC 6320 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Type N - 1X bearing, portable.
7、Type O - 1X 60 Hz, single dial, bulkhead mounted with 6-inch dial. Type P - 1X and 36X 60 Hz, single dial, bearing. Type R - 1X and 36X Type S - 1X and 36X 60 Hz, double dial, concentric steering (console Type T - 1X 60 Hz, single dial, bulkhead mounted with ll-inch 60 or 400 Hz, as specified (see 6
8、.2.1), single dial 60 Hz, double dial, concentric steering. mounted). dial. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications and standards. Unless otherwise specified, the fol- lowing specifications and standards of the issue listed in that issue of the De- partment of Defense
9、Index of Specifications and Standards (DoDISS) specified in the solicitation form a part of this specification to the extent specified herein. SPECIFICATIONS MILITARY MIL-C-915 - Cable and Cord Electrical, For Shipboard Use, General Specification for. MIL-E-16400 - Electronic, Interior Communication
10、 and Navigation Equipment, Naval Ship and Shore: General Speci- fication for. MIL-1-17214 - Indicator, Permeability; Low-Mu (Go-No-Go). MIL-E-17555 - Electronic and Electrical Equipment, Accessories, MIL-S-22432 - Servo Motors, General Specification. MIL-C-26482 - Connectors, Electrical, (Circular,
11、Minature, and Repair Parts; Packaging and Packing of. Quick Disconnect, Environment Resisting), Receptacle and Plugs. Coupling, Crimp Type, Corrosion Proof, Class J. MIL-C-26482/4 - Connector, Plug, Electrical, Straight, Bayonet STANDARDS MILITARY MIL-STD-461 - Electromagnetic Emission and Susceptib
12、ility Requirements for the Control of Electromagnetic Interference. Measurement of. Interference and Electromagnetic Compatibility Technology. MIL-STD-462 - Electromagnetic Interference Characteristics, MIL-STD-463 - Definitions and System of Units, Electromagnetic MIL-STD-710 - Synchros, 60 and 400
13、 Hertz. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-llIL-I-l1567bK b3 399990b 023b973 9 MIL-I-l5676K(SH) MILITARY (Continued) MIL-STD-740 - Airborne and Structureborne Noise Measurements MIL-STD-1310 and Acceptance Criteria of Shipboard Equipment
14、. - Shipboard Bonding, Grounding, and Other Techniques for Electromagnetic Compatibility and Safety. 2.1.2 Government drawings. The following Government drawings form a part of this specification to the extent specified herein. DRAWINGS NAVAL SEA SYSTEMS COMMAND (NAVSEA) 815-1197068 - Gyro Compass E
15、quipment, Ships Course 9000-S6504-73687 - Dial Markings for IC, Telegraph and Indicating Indicator, Gimbal Ring and Bracket. Sys t ems . (Copies of specifications, standards and drawings required by contractors in connection with specific acquisition functions should be obtained from the contracting
16、 activity or as directed by the contracting officer.) 2.2 Other publications. The following document forms a part of this specification to the extent specified herein. The issues of the document which are indicated as DoD adopted shall be the issue listed in the current DoDISS and the supplement the
17、reto, if applicable. UNIFORM CLASSIFICATION COMMITTEE AGENT Uniform Freight Classification Ratings, Rules and Regulations (Application for copies should be addressed to the Uniform Classification Committee Agent, Tariff Publication Officer, Room 1106, 222 South Riverside Plaza, Chicago, IL 60606.) 2
18、.3 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein, the text of this specifica- tion shall take precedence. 3. REQUIREMENTS 3.1 Qualification. The ships course indicators furnished under this specification shall be products which
19、 are qualified for listing on the applicable qualified products list at the time set for opening of bids (see 4.2 and 6.3). 3.2 General requirements. Any type of indicator shall require external power of only one frequency, either 60 or 400 Hz, 115 volt (V), in accordance with 1.2. shall be in accor
20、dance with MIL-E-16400. In addition to the requirements specified herein, the indicators 3.3 Design. Ships course indicators shall consist of an enclosure, housing dials, synchro mechanisms to drive the dials, and an illumination circuit. The enclosure for all types of indicators, except for types B
21、 and P, shall be either of metal or plastic. indicators shall be of metal. The size of the indicator shall be held to a minimum in keeping with the dial size and bezel ring dimensions. The enclosure for types B and P The synchro 3 Provided by IHSNot for ResaleNo reproduction or networking permitted
22、without license from IHS-,-,-MIL-I-15676K b3 9999906 023b971i O W MIL-I-l5676K(SH) methanism shall be easily removable from the enclosure without the use of special tools. For electrical connections between the synchro mechanism and the enclosure wiring, a plug or connector attached to the synchro a
23、ssembly by a flexible cable, which can double as a test cable, shall be used. A grounding conductor shall be included in the cable. Grounding shall conform to the requirements for electronic equipment in accordance with MIL-STD-1310. All internal assemblies shall be removable from the enclosure at t
24、he dial end. For indicators having plastic enclosures, a grounding strap shall be afforded in proximity to one of the external mounting holes for easy attachment to the mounting bolt used. The weight shall not exceed the following: Pounds Type A and O Type B and P Type E and R Type F and S Type G Ty
25、pe H Type K Type L Type M and T Type N 35 35 35 30 35 30 15 15 40 15 3.4 Synchro mechanism. Dials shall be positioned by a synchro mechanism consisting of standard Navy synchro control transformers (size 18CT6 or 23CT6 for types-G, H, O, P, R, S and T; size 18CT4 for types A, B, E, F and M), an all-
26、transistor servo amplifier, and a servo motor, except where otherwise specified herein. The mechanism of similar types of indicators covered by this specification shall be electrically and mechanically interchangeable. Synchro capacitors shall be required in accordance with MIL-E-16400. Synchros for
27、 all types of indicators shall be in accordance with MIL-STD-710. The change of servo motor shall be approved by NAVSEA if the motor is different from the one used for qualification inspection. Servo motors shall conform to MIL-S-22432 when operating in a high ambient temperature of 100 degrees Cels
28、ius (OC). Allowable temperature rise of the servo motor when operating at the high ambient temperature of 100C shall be 65OC. at the high ambient temperature shall be twice the maximum torque required for the indicator, to meet its temperature and humidity accuracy test. Stall torque of the servo mo
29、tor 3.4.1 Parts and units in the equipment shall be protected against tran- sients from all sources. The profile of the transients to be protected against shall include a maximum voltage peak of 700 V and having a duration of 2 micro- seconds, 3.5 Accuracy. The allowable error for the various types
30、of indicators shall be as follows: 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-15676K 63 9999906 0236775 2 = I 3.12 Detail requirements. Maximum allowable error in degrees, measured in accordance with 4.5.1 and 4.5.2, and observed on the
31、dials Static Dynamic One speed dial Six speed dial One speed dial Type A and O B and P E and R F and S G H K L M and T N 0.5 0.2 0.5 0.5 0.75 (Inner dial) O .50 (Outer dial) 0.75 (inner dial) 0.50 (Outer dial) 1 .o 1 .o 0.5 1.0 1 .o 0.5 1.0 1 .o 1.5 1 .o 1.5 1 .o 2.0 2.0 1 .o 2.0 3.5.1 The accuracie
32、s specified herein for synchro motor driven dials is for operation with synchro transmitter of identical size. 3.6 Degree of enclosure. Except as otherwise specified herein, the enclosures for the ships course indicators shall be watertight (+foot). 3.7 Illumination. Dial illumination for all types
33、of indicators shall be red internal illumination in accordance with MIL-E-16400 except as specified in 3.12.4.4 and 3.12.6.4. 3.8 Synchronization. The indicators shall be self-synchronous from all positions out of synchronism with the input signal (including the 180-degree position, except for the l
34、-speed indicators). 3.9 Oscillations. The indicators shall follow the motion of the input transmitters smoothly and with no spurious oscillations. 3.10 Permeability. Parts except those necessary to electromagnetic circuits, ball bearings, shafts, thrust plates, and similar application where strength
35、 or hardness is essential, shall be constructed of nonferrous, non- magnetic material having a permeability no greater than 2.0. 3.11 Painting. The interior and exterior surfaces of the ships course shall be painted in accordance with MIL-E-16400. 3.12.1 Types A and O, 60 and 400 Hz, single dial, bu
36、lkhead mounted indi- cators. The types A and O indicators shall mount directly on a bulkhead with the dial in a vertical position. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-LSb7bK b3 = 99999Ob 0236976 4 W MIL-I-l5676K(SH) 3.12.1.1 - Dia
37、l. The inner dial shall be positioned by the synchro mechanism, and shall be in accordance with Drawing 9000-S6504-73687. The diameter of the inner movable dial and the effective outer diameter of its degree mark circle shall be 6.0 inches. A white fixed and red illuminated index shall be provided i
38、n lieu OE a fixed outer dial against which to read the ships true heading. The index shall have the shape of an inverted triangle with its base and height each a nominal 1/4 inch. The inner movable dial shall have a black background with white markings. l The index shall be on a black background. 3.
39、12.2 Types B and P, 60 and 400 Hz, single dial, bearing indicators. The types B and P indicators shall be so constructed that when a Navy azimuth circle or bearing circle is attached, the cross hair shall be plainly visible against the background of the dial in any position, in daylight, twilight, a
40、nd darkness. From the extreme top surface of the bezel ring to the faces of the dials, the distance shall be held between 3/4 and 1-1/4 inch. 3.12.2.1 Dial, The inner dial shall be in accordance with Drawing 9000- - S6504-73687 as to markings; shall have all markings appear outside the periphery of
41、a circle 5-1/4 inches in diameter, and shall be positioned by a synchro unit consisting of two control transformers, a single channel amplifier with input selector circuit, and a servo motor arranged to provide thirty-six speed accuracy on a single self synchronizing dial. Around the moving dial sha
42、ll be a fixed ring dial graduated from O degree to 359 degrees in one-degree divisions with markings corresponding to those for the inner dial, but with the numerals to the outside edge. This relative bearing dial shall be used in determining the bearing of an object relative to the ship. The dials
43、shall have a white background with black graduations to facilitate the taking of bearings stroke width for minor graduations shall be .O12 x 1/8 inch and 5 and 10 degree gradua- tions shall be .O15 x 5/32 inch. Provision shall be made so that by simple ad- justment the indicator may be operated with
44、 just a l-speed input in lieu of the 1 and 36-speed input. 3.12.2.2 The indicator shall have a rim of 70 percent - 30 percent copper- nickel alloy. The rim shall have a diameter of 7.800 inches +O.OOO/-0.005 inch, to permit use of a Navy azimuth circle or bearing circle. 3.12.2.3 The top bezel ring
45、of the bearing indicator shall be beveled at the inner edge, and shall be marked to provide a fore and aft line, parallel to the lubber line of the repeater, for use with Navy azimuth circle or bearing circle for the taking of relative bearings. The fore and aft points of the bezel ring and case sha
46、ll be engraved “F“ and “A“, respectively. The bezel ring horizontal bearing surface for the azimuth or bearing circles shall be approximately 0.390 inch in width. 3.12.2.4 Bearing indicator mounting. The case of the bearing indicator shall be so that it can be mounted in a gimbal ring and bracket mo
47、unting de- signed for installation on a pedestal. The gimbal ring and bracket mounting shall be as shown on Drawing 815-1197068. This mounting shall permit free motion of the bearing indicator during a roll of 45 degrees or pitch of 15 degrees from the vertical or any combination of the two, there s
48、hall be no obstruction in the line of sight when taking bearings under condition of 20 degree roll and 5 degree pitch. bracket mounting or gimbal ring and bracket mounting only, for each bearing indicator, shall be as specified (see 6.2.1). The furnishing of a pedestal, gimbal ring and The bearing i
49、ndicator shall be 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-I-lSb7bK 63 m 9999906 0236977 b m pendulous when mounted in the gimbal ring and while having a 7-pound weight mounted on the top bezel of the indicator with the weight having a vertical center of gravity 2 inches above the top of the top bezel ring of the indica- tor. From the bottom surface of the pedestal mounting feet to the top of the
