1、MIL-I-3BL33A 66 7797706 0137807 5 I- I MIL-1-38133A( USA F) 14 November 1967 Superseding 5 April 1963 M I L- I - 3 8 1 3 3 ( USA F) MILITARY SPECIFICATION INDICATOR, PRESSURE, OIL 1. SCOFF. 1.1 This specification covers hermetically sealed, remote indicating, voltage ratio type, integrally lighted,
2、oil pressure indicators. 1.2 Classification. The indicators shall be of the following types, as specified (see 6.2): Type I Type II Indicator, Fressure, Oil EGU-1O/A - White lighting Indicator, Fressure, Oil EGU-ll/A - Red lighting 2. AFPLICABLE DOCUMENTS 2.1 The following documents, of the issue in
3、 effect on date of invitation for bids or request for proposal, form a part of this specification to the extent specified herein, SPECIFICATIONS Military M IL-C - 6 75 MIL-1-25437 MIL-L-25467 MIL-C-26500 MIL- L-27160 MIL-T-38230 STANDARDS Federal FE D-STD-595 Military MIL-STD-781 Coating of Glass Op
4、tical Elements (Anti-reflection) Indicators, Aircraft, Pressure, Voltage Ratio Type, General Speci- fication for Lighting, Integral, Aircraft Instrument, General Specification for Connector, General Purpose, Electrical Miniature, Circular, Envi- ronment Resisting, 200C Ambient Temperature Lighting,
5、Instrument, Integral, White, General Specification for Transmitter, Fressure TRU-66/A, Oil, Variable Reluctance Colors FSC 6685 Licensed by Information Handling ServicesMIL-I-38133A 66 W 9999906 OL378LO 1 M I L-I- 3 8 13 3A (USA F) M IL-STD-785 MS27034 MS33639 Case, Instrument, Clamp-Mounted, Aircra
6、ft (Copies of documents required by suppliers in connection with specific procurement functions may be obtained from the procuringactivityor as directed by the contracting officer.) Requirements for Reliability Frogram (for Systems and Eqiiipments) Connector, Receptacle, Electrical, Fin Insert, Cyli
7、ndrical, Miniature Hermetic, Solder Mount 3. REQUIREMEKTS 3.1 Qualification. The indicators furnished under this specification shall be products which are qualified for listing on the applicable qualified products list at the time set for opening of bids (see 4.3 and 6.3). 3.2 General specification,
8、 The requirements of MIL-1-25437 apply as requirements of this specification with the exceptions and additions specified herein. When the two specifications conflict, this specification shall govern. 3.3 Design and construction 3.3.1 The indicator shall be designed for use with the TRU-66/A transmit
9、ter conforming to MIL-T-38230. 3.3.2 Case. The case dimensions shall conform to MS33639 for the l-inch size. The case length shall not exceed 4.Y) inches. 3.3.3 Electrical connector. electrical connector conforming to MIL-C -26500, The Pndicator shall be provided with an MS27034H 10T5P 3.3.4 Reliabi
10、lity program. accordance with MIL-STD-785. The chtractor shall establish a reliability program in 3.3.4.1 Reliability. The indicator Shall have a minimum mean-time-between-failures (MTBF) of 2,000 hours at a confence level of 90 percent and a discrimination ratio of 1.5. 3.3.4.2 Longevity. The indic
11、ator shall have an operating life span of 3,000 hours, 3.4 Performance 3.4.1 Tolerances. The indicator shall operate within the tolerances specified in tables I and II. 3.5 Lighting. The indicators shall be integrally lighted and shall meet all require- ments specified herein. The type I indicator (
12、EGV-lO/A) shall be lighted in accordance with MIL-L-27160, and the type II indicator (FGU-ll/A) shall be lighted in accordance with MIL-L-25467. 2 Licensed by Information Handling ServicesMIL-I-38133A bb 77777Ob OL37BLl 3 Test Pressure PSI O 10 20 30 40 50 60 70 80 90 100 TABLF I. Temperature Scale
13、Error Scale Error High and Low Temp Exp0sui.e High and Low Temperature Room Temperature PSI FSI 1.50 3.00 1.50 3.00 1.50 3.00 1.50 3.00 1.50 3.00 1.50 3.00 1.50 3.00 1.50 3.00 1.50 3.00 1.50 3,00 1.50 3.00 TABLE II. Position, Friction, and Vibration Error Test Fosition error at 50 psi Friction Room
14、temperature High temperature Low temperature Fointer oscillation Fointer variation Vibration Tolerance iPS1 1 1.5 1.5 2.00 2.25 2. o 1.5 3.6 Pointer. The pointer shall conform to figure 1 and shall be suitable for integral lighting. The length of the pointer shall be such that the pointer tip will e
15、xtend into the scale a distance equal to approximately one-third the length of the shortest graduation. 3.6.1 Finish. of FED-595. The lighted portion of the pointer shall be finished in color KO. 37875 3.7 Dial. be located on the horizontal centerline at the left side of the dial. The dial display s
16、hall conform to figure 1. The 45-psi graduation shall J 3 Licensed by Information Handling Services7- MIL-I-38L33A bb W 7777906 OL378L2 5 m -I- -i6 DIA MAX 80 40 20 DESICN OPTIONAL UNDER MASK - - - -. Lid- - - FL- I DIMENSIONS IN INCHES UNLESS OTHERWISE SPECIFIED, TOLERANCES: FRACTIONS 4 .FIGURE 1.
17、Indicator Dial Licensed by Information Handling ServicesMIL-I-3B133A 66 W 7777706 0137813 7 MIL-I-38133A(CTSAF) 3.7.1 Markings 3.7.1.1 White. The following markings shall be finished in durable white, color No. 37875 of FED-STD-595. The dimensions shall be as specified. Width of Line Height or Lengt
18、h or Graduation Inch *1/64 Inch 10.005 Numerals O, 20, 40, 60, 80, and 100 10-Pound graduations 5-Pound graduations Lettering OIL Lettering PSI 3/32 7/64 5/64 5/64 5/64 0.0213 O. 030 0.015 0.015 0.015 3.7.1.2 Black. The markings USAF and EGU-lO/A or EGU-ll/A, as applicable, shall be permanently and
19、legibly marked on the side of the indicator in 1/8-inch-high letters, Unless otherwise specified, these and all other markings shall be finished in durable black, color No. 37038 of FED-STD-595. 3.8 Electrical wiring. internal wiring shall be color coded and connected to the receptacle as shown. Int
20、ernal and external wiring shall conform to figure 2. The 3.9 Electrical characteristics. The current used by the indicator shall not exceed 75 ma. The power consumption, exclusive of the lamps, shall not exceed 0.60 watt. 3.10 Percent reflectance. All reflecting glass surface shall be provided with
21、a reflectance reducing coating which meets the requirements of MIL-C-675, except for the materials used, in addition to withstanding the environmental conditions specified herein. The following reflectance tolerances shall apply: Angle of Incidence Wavelength Millimicrons Percent Reflectance O“ 0“ 3
22、0 “ 30 450 - 675 425 - 700 450 - 625 425 - 700 0.6 absolute 0.5 average 1.0 absolute 0.5 average. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the supplier is responsible for the performance of all inspection require
23、ments as specified herein. Except as otherwise specified, the supplier may utilize his own facilities or any commercial laboratory acceptable to the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necess
24、ary to assure supplies and services conform to prescribed requirements. 5 Licensed by Information Handling ServicesMIL-I-38133A 66 777970b 0137814 7 M MIL-I-38133A(USA F) LIGHTING G- POWER SUPPLY 4 TRANSMITTER c -3 - + -a 7 - 7 - 7 - - RECEPTACLE PINS ORANGE 15 INDICATOR (TYP) v b 1-2 INDICATOR POWE
25、R, 26V 400 % I4 1-3 TAP VOLTAGE 4-5 LIGHTINQ POWER, 5V o2 RED YELLOW FIELD COILS 1 01 BLACK INTERNAL WIRING EXTERNAL Wi RIN G FIGURE 2. Wiring Diagram 6 Licensed by Information Handling ServicesMI L- I - 3 8 13 3A ( USA F) 4.2 General specification. The inspection and testing of indicators shall be
26、in accordance with MIL-i-25437 and as specified herein. 4.3 Qualification testing 4.3.1 Test samples, The test samples shall consist of 10 indicators representative of the production equipment, The samples shall be identified with the manufacturers part number and such other information as required
27、by the qualifying activity. Seven of the samples shall be subjected to the reliability test only and the other three shall be subjected to all the tests except reliability, 4.3.2 Test report. The contractor shall prepare and submit a test report in accordance with MIL-STD-831. 4.3.3 Qualification te
28、sts. The qualification tests shall consist of all the tests specified herein and in MIL-1-25437. 4.3.3.1 Nonstandard parts data approval. When nonstandard parts are used in the construction of the indicator, nonstandard parts data approval shall be a prerequisite to qualification approval. 4.4 Test
29、methods 4.4.1 Percent reflectance. and the tolerances shall not exceed those specified in 3.10. The reflectance of all glass surfaces shall be measured 4.4.2 Lighting. with MIL-L-27160 and the type II indicator shall be subjected to lighting tests in accordance with MIL-L-25467. The type I indicator
30、 shall be subjected to lighting tests in accordance 4.4.3 Reliability. Seven indicators shall be tested for reliability. Acceptance permitting production and total test time shall be in accordance with MIL-STD-781, test plan I. Recording, data handling, and reporting shall also be in accordance with
31、 MIL-STD-781. 4.4.3.1 Test. - The test equipment and fixtures shall include provisions for vibration and temperature cycling at the periodic intervals specified herein. During this test, input signals shall be applied to the indicator at a rate of 2 to 3 cycles (minimum and maximum) per minute from
32、O to 85 percent of full scale and return. The test shall begin when rated power is applied. After completion of 4 hours of operation with rated power on, which shall include at least 480 cycles of operation, the power shall be turned off and shall remain off for a period of 10 minutes. For at least
33、10 minutes out of every hour of ON time, the indicator shall be vibrated in accordance with test level J of MIL-STD-781. The temperature cycles shall be conducted in the following sequence: 4 hours at -20C, 14 minutes fortemperature change to +50C at a minimum rate of 5C per minute: 4 hours at +50“C
34、, 14 minutes for temperature change to -2O“C, and 4 hours at -20C. In case of malfunctjon, the malfunction shall be recorded and 7 Licensed by Information Handling ServicesMIL-I-38333A bb I 777770b 0337836 2 the test interrupted while repairs are made. Upon completion of each 250 hours of cycling, t
35、he indicator shall be checked for scale error. The scale error reading shall not exceed 150 percent of the room temperature tolerance in table II. No recalibration shall be performed on the units during this test. The test may be interrupted for weekend shutdown. The contractor shall prepare a repor
36、t in accordance with MIL- STD-781 which shall contain test procedures, details of any malfunctions, and cor- rective actions taken. 4.4.3.2 Longevity. At the completion of the reliability test, testing of three of the indicators shall be continued for a total of 3,000 hours each, The test time accum
37、ulated during the reliability test shall be applied to this test. The accept-reject criteria is not applicable. 5. PREPARATION FOR DELIVERY 5.1 Preparation for delivery shall be in accordance with MIL-1-25437 and as follows: 5.1.1 Marking for shipment. as applicable: The shipment marking nomenclatur
38、e shall be follows, Indicator, Pressure, Oil EGU-1O/A or Indicator, Pressure, Oil EGU-ll/A. 6. NOTES 6.1 Intended use. The EGU-lO/A and EGU-ll/A indicators covered by this specifi- cation are intended for use with the TRU-66/A transmitter in indicating remotely the oil pressure of gas turbine engine
39、s where panel space is of prime importance. 6.2 Ordering data. Procurement documents should specify the following: a. Title, number, and date of this specification b. Type of indicator required (see 1.2) c. When sampling plan B tests will not be conducted d. Levels of packaging and packing required.
40、 6.3 Qualification. With respect to products requiring qualification, awards will be made only for products which are, at the time set for opening of bids, qualified for inclusion in the applicable Qualified Products List whether or not such products have actually been so listed by that date, The at
41、tention of suppliers is called to this requirement, and manufacturers are urged to arrange to have the produzts that they 8 J Licensed by Information Handling ServicesM IL- I - 38 13 3.4 (USA F) propose to offer to the Federal Government tested for qualification in order that they may be eligible to
42、 be awarded contracts or orders for the products covered by this specification. The activity responsible for the Qualified Products List is the Systems Engineering Group, Attn: SE FIP, Wright-Patterson Air Force Base, Ohio 45433. and information pertaining to qualification of products may be obtaine
43、d from that activity. 6.4 Asterisks are not used in this revision to identify changes with respect to the previous issue due to the extensiveness of the changes. Custodian: Air Force - 11 Review activity: Air Force - 82 Preparing activity : Air Force - 11 Project No. 6685-F254 9 J Licensed by Information Handling Services
