1、2May 1962 . SUPERSEDING MIL-C - 1802 lA(SHIPS) 1 April 1958 MILITARY SPECIFICATION CONVERTER, SPEED, UNDERWATER LOG 1. SCOPE 1.1 This specification covers speed coverters for use on Naval Ships having equipment installed which requires a speed input different from that transmitted by the underwater
2、log system The speed converters receives an input from the underwater log system and coverts it to the type of signal required for the equipment receiving the signal. 1.2 Classification. - Speed converters shall be classed according to input and output speeds and the types of synchros used as shown
3、in Table 1. Table I 0-40 Knots, 60 cycle, 18CT6b per 360 degrees rotation 0-40 Knots, 400 cycle, 18 CT 4a Input Output Data 400 icle 60 cycle 31TX6 Type synchro 31TX6 31TX6 23CX4 0-100 - 23CX4 23CX4 0-10 X X X X X X X X X X 23TX4 0-40 23CX4 0-40 b3CX4 2-10 0-100 0-10 X X X X X X 0-25 x X X 0-100 X X
4、 X X X X X X x. Range Knots per 360 degrees rotation Model YC1 YC2 YC3 YC4 YC5 YC6 YC7 YC8 YC9 YC10 YC11 YC12 YC13* X X X X X X X X X X X X X *(25 k, ev. on 18CT6 input) 2. APPLICABLE DOCUMENTS 2.1 The following documents, of the issue in effect on date of invitation for bids, form a part of this sp
5、ecification to the extent specified herein: SPECIFICATIONS MIL-1-983 - Interior Communication Equipment, Naval Ship- board; Basic Design Re- quirements for. MIL-M-15071 - Manuals, Equipment and Systems. MIL-E-17555 - Electronic and Electrical Equipment and Assoicated Repair Parts; Preparation for De
6、livery of. MIL-S-20708 - Synchros, 60 and 400 Cycle, General Specification. MILITARY MIL-D-963 - Drawings, Electrical, Hull and Mechanical Equip- ment For Naval Ship- board Use. FSC 6605 % 7 / -. THIS DOCUMENT CONTAINS 5 PAGES. W4Gt b- ,- F- . Provided by IHSNot for ResaleNo reproduction or networki
7、ng permitted without license from IHS-,-,-MIL-C-l8021B(SHIPS) MILITARY (Contd. ) MIL-E-22843 - Equipment, Low Noise . Level, (Naval Shipboard use). (Copies of specifications, standards, drawings, and publications required by contractors in connec- tion with specific procurement functions should be o
8、btained from the procuring activity or as directed by the contracting officer.) 3. REQUIREMENTS 3.1 Preproduction unit. - When ordered under a contract schedule, a preproduction unit of the underwater log speed converter shall be furnished and fully tested by the manufacturer for performance of the
9、tests specified herein (see 4.2 and 6.1). designed to receive a single speed synchro speed signal on a synchro control transformer, amplify the signal, and transmit synchro speed signals as required on control transmitters or torque trans- mitters at a definite ratio to the received signal in accord
10、ance with the model ordered. The speed converter shail indicate for system alignment pur- poses the received Signal. The converter shall utilize amplifiers of either (1) the all magnetic type, or (2) the transistorized type, and shall be designed for continuous operation. Electron tubes shall not be
11、 used. 3.2 Description. - The speed converter shall be 3.3 General features. - The equipment shall be in accordance with the following paragraphs of MIL-1-983 in addition to the requirements specified herein: (Whenever a requirement of MIL-1-983 conflicts with a requirement of this specification, th
12、e requirements of this specification shall govern. ) General information Definitions Materials, general Stressed or vital parts Substitution of (equal or superior) materials Fungus-inert materials Unacceptable materials Acceptable materials Flammable materials Arc-resistant materials Toxic Materials
13、 wood Aluminum Magnesium Iron or steel Brass Bronze Copper Copper-beryllium alloy 2 , ,-=-= - Copper-nickel alloy Nickel-copper alloy (Monel) Copper-nickel-zinc alloy (nickel silver) zinc Other metals Springs Plastics Ceramics Glass Lubricants and lubrication Painting Protection against corrosion Bo
14、lts, machine screws, studs and nuts Gaskets Dials and pointers Dial sizes Shock, vibration and inclination (vital vibration Primary power supply circuits Power supply tolerances (see i 2) Personnel protection Shielding and radio frequency noise reduction Ground potential and grounding Soldering Elec
15、trical parts mounting Internal subassembly connection (Test cable Locking devices Washers Ball bearings Parts-electrical-general Electron tube or capacitor sockets Capacitors Variable resistors Transformers Relays Synchros Electrical tapes Switches Fuses Fuseholders and fuseclips Metallic rectifiers
16、 Enclosures-general Enclosure-accessibility Enclosure-degree of (see 3.5.1) Enclosure-mounting (see 3.5.1) Stiffening grooves Minimum sheet metal thicknesses Through bolting Stuffing tubes Ventilation Size (for submarines) Threaded devices Rounded corners and edges Internal subassembly protection Dr
17、illed and tapped holes test required) required) _ Welding Temperature and humidity (Special cold limit Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-LB02LB bb 77777Ob OL27b07 B Acceptance inspection Detailed test procedures Terminal boards co
18、nnectors and terminals Synchro connections and markings Wiring Color coding Electrical insulation Dielectric strerigth and insulation resistance Drawings-general Drawings-preliminary Drawings-working Schematic diagrams Wiring diagram. Drawing list Assembly drawings List of onboard repair parts Drawi
19、ngs-manufacturing Bill of materials Interchangeability and standardization Technical manuals Repair parts Repair parts (electronic) Designation and marking (Serial numbers and required) Design for production Reports Nomeclature Workmanship and general examination Operating test General examination S
20、upply line voltage and frequency variation 3.4 Detail requirements. - 3.4.1 Enclosure. - The speed converter shallbe housed in a dripproof case which shall not exceed 11 inches wide by 14 inches high by 9 inches deep, and shall be designed for bulkhead mounting. The gross weight shall not exceed 45
21、pounds. 3.4.2 Operation. - The speed converter shall receive synchro speed signals on the control trans- former specified in table I. This input shall be converted to speed signals, having the required output indicated in Table I according to the mcdel(s) ordered, through a suitable motor driven gre
22、ar train. The stability of the servo system, Mo, or maximum ratio of the output signal to th? input signal, shall not exceed 1.3 and shall occur at a frequency of not less than 3 cycles per second. For this test the input signal shall be sinusoidal and the maximum rate of change need not exceed O. 5
23、5 knots per second. The saturation speed shall be greater than 1.25 knots per second. The servo shall follow the input signil in direction of travel to avoid false nulls in the O- 100K output signal. 3.4.3 Power supply. - The speed converter shall be designed to operate within specified accuracy lim
24、its on ships normal power supply of 115 volts, 60 cycles, plus or minus 7 volts and plus or mirlus 5 MIL- C - 1 802 1 B (SHIPS) cycles per second. Excitation of the 400 cycle trans- mitting synchros will be 115 volts, 400 cycles, plus. or minus 7 volts and plus or minus 25 cycles per second. 3.4.4 A
25、ccuracy. - The total error in the system due to static friction plus back lash between input and output shall not exceed O. 05 knot. 3.4,5 Dynamic response. - The dynamic accu- racy or velocity figure of merit, kv, shallbe equal to or better than O. 1 knot when speed is changing at the rate of 1. O
26、knots per second. 3.4.6 Air-borne and structure-borne noise. - Air-borne and structure-borne noise limits shall not exceed that specified in MIL-E-22843 for Grade A equipment. 3.4.7 nboard repair parts. - The folloying items, if incorporated in the equipment, shall be furnished as onboard repair par
27、ts: Name Quantity Amplifier One Cable Connectors Two of each type andsize Precision and special One of each resistors type and size Test cable One of each type required to service equipment (Magnetic or transistor- ized) 3.4.8 Electronic assemblies and subassemblies such as the servo amplifier shall
28、 not be potted, embedded, or encapsulated, and shall be repairable. All components shall be capable of operating at 150F for 125 hours continuously without failure or malfunctions. 3.4.9 Transistors, diodes, and other semi- conductor devices shall be protected against electri- cal voltage surges of
29、100 percent over voltage per- sisting for 1 millesecond. 3.4.10 The equipment weight and center of gravity shall be included on the outline and mounting dimension pians. 3.4.11 Detail manufacturing pians shall include all dimensions and tolerances and shall complktely identify all items and sources
30、of supply. shall be Tlass A“ in accordance with paragraph 3.1 3.4.12 Unless otherwise spebified, all plans Of MIL-D-963. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-LBOZLB bb W MIL-C-l802lb(SHIPS) 3.4.13 All synchros shall be contractor fur
31、nished material in accordance with MIL-S-20708. 3.4.14 Technical manuals shall be class A in accordance with MIL-M-15071. 4. QUALITY ASSURANCE PROVISIONS 4.1 Unless otherwise specified in the contract or purchase order, the supplier is responsible for the performance of all inspection requirements a
32、s specified herein. The government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. 4.2 When specified in the order, preproduction sample of the underwat
33、er log speed converter equipment conforming in every respect to the spec- ifications herein, and manufactured with tools, materials and methods which are the same as, or representative of,. those which will be used in the manufacture of the production equipment to be fur- nished, shall be fully test
34、ed (all groups A, B and C tests per 4.4) by the contractor at his own expense and under the supervision of the inspector to deter- mine compliance with the aforesaid specifications. The contractor shall notify, in writing, the cogni- zant inspector of the place where, and the time when, such tests w
35、ill be conducted at least two weeks prior to the commencement thereof, andshall attach a schedule of the tests to be conducted with such notice. In addition to any other requirements of the Government with respect to the performance of the tests, the contractor shall make a record of all data obtain
36、ed during such test in such form as is consonant with good engineering practice and shall furnish to the cognizant inspector three copies of all such data. 4.3 General. - The tests to be performed on the equipment shall be as specified in 4.4. The atten- tion of the manufacturer is invited to the ap
37、plicable paragraphs of MIL-1-983 for information concerning these tests such as where conducted, failures, test conditions and methods. 4.4 Acceptance of preproduction tests. - The result of each test shall be compared with the spec- ification requirements. In the event of failure to conform to this
38、 specification, the contractor shall correct the cause of failure in the preproduction sample and on all production units. The preproduc- tion unit shall satisfactorily qualify in all tests in Groups A, B and C and shall be conducted at a laboratory satisfactory to the bureau or agency concerned. Th
39、e tests shall be performed in general in the order listed. Test Group A tests General exam- ination Operating Dielectric Strength Insulation re- kistance Group B tests Suppline line voltage and frequency variation Group C tests Structure borne noise (vibra- tion) for sub- marine equip- ment Airborne
40、 audible noise Shielding and radio frequency noise Temperature and humidity Inclination Accelerated life Enclosure Vibration Shock Requirement Test Paragraph Paragraph 3.3 MIL-1-983 3.3 MIL-I- 983 3.3 MIL-1-983 3.3 MIL-1-983 3.3 MIL-1-983 3.4.6 MIL-E-22843 3.4.6 MIL-E-22843 3.3 MIL-1-983 3.3 MIL-1-9
41、83 3.3 MIL-1-983 3.3 MIL-I- 983 3.3 MIL-1-983 3.3 MIL-1-983 3.3 MIL-1-983 4.4.1 Acceptance inspection tests. - All produc- tion equipment shall be subjected to the tests in Group A at the place of manufacture. 4.5 Test procedures. - 4.5.1 General examination. - The general exam- ination shall be con
42、ducted in accordance with MIL- 1-983. 4.5.2 Operating test. - The operating test shall consist of electrically connecting the input of the speed converter to a suitable synchro as a dummy director and the output to a suitable synchro as a dummy load, and energizing all circuits with rated power. The
43、 output synchros should read zero when the input synchro is set on zero. The input synchros should be rotated over the entire range, O to 40 knots, to check direction of rotation and accuracy of all output signals. Upon completion, the equip- ment shall be checked for conformance with 3.4.5. Provide
44、d by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4.5.3 Accelerated life test. - The accelerated life test shall be as specified in MIL-1-983. The equipment shall be operated over the range of O - 40 knots oscillating from O to full scale and back at the rate
45、 of one or more cycles per minute. 5. PREPARATION FOR DELIVERY 5.1 Domestic shipment and early equipment in- stallation and for storage of shipboard repair parts. 5.1.1 Basic equipment. r 5.1.1.1 Preservation and packaging. - Presertr- ation and packaging shall be sufficient to afford adequate prote
46、ction against corrosion, deterioration and physical damage during shipment from the supply source to the using activity and until early installation. 5.1.1.2 Packing. - Packing shall be accomp- lished in a manner which will insure acceptance by common carrier and will afford protection against physi
47、cal and mechanical damage during direct shipment from the supply source to the using activity for early installation. The shipping containers or method of packing shall conform to the Uniform Freight Classification Rules and Regulations or other carrier regulations as applicable to the mode of trans
48、portation. 5.1.1.3 Marking. - Shipment marking informa- tion shall be provided on interior packages and exterior shipping containers in accordance with the contractors commercial practice. The information shall include nomenclature, contract or order number, contractors name and destination. 5.1.2 S
49、hipboard repair parts. - The shipboard repair parts shall be preserved and packaged level A; packed level C and marked levels A and C respectively ih accordance with MIL-E-17555. shipment requirements (See 6.2). 5.2 Domestic shipment and storage or overseas 5.2.1 Preservation, packaging, packing and marking. - The equipment and accessories, repair parts and technical publications shall be preserved and packaged levels A or C; packed levels A or B as specified (see 6.2) and marked in accordan
