1、MIL-T-58097 bb m 97999Ob OL425Lb 4 m r L II I TRP . MIL ITARY SPEC I FI CATION ITTERS, PRESSURE, HELICOPTER, MI L-T-58097 (AV) 10 January 1975 OLTAGE RATIO TYP, GENERAL SPECIFICATIN FOR This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1
2、This specification covers the general requirements for 2. APPLICABLE DOCUMENTS vol tage ratio type he1 icopter pressure transmitters. 2.1 The following documents, of the issue in effect on date of invitation for bids or request for proposal, form a part of this specification to the extent specified
3、herein. SPECIFICATIONS Mi 1 i tary MIL-C-5015 Connectors , Electrical , “AN“ Type MI L-C- 5541 Chemical Films and Chemical Film Materials MIL-C-7742 MIL-L-7808 MIL-A-8625 MIL-1-58098 for Al uminum and Al uminum Al loys Screw Threads , Standard; Optimum Selected . Series: General Specification for Lu
4、bricating Oil , Aircraft Turbine Engine, Synthetic Base Anodic Coatings, for Aluminum and Aluminum Al loys Indicators, Aircraft , Pressure , Vol tage Ratio Type, General Specification for STAN DARDS pli 1 i tary MI L-STD- 1 O0 Engi neeri ng Drawi ng Practices . MIL-STD-129 Marking for Shipment and S
5、torage. FSC 6620 /- THIS DOCUMENT CONTAINS ab PAGES. /- . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-58097( AV) MIL-STD-130 Identification Marking of US Military Property MIL-STD-143 Specifications and Standards; Order of Precedence for th
6、e Selection of MIL-STD-461 , . Electromagnetic Interference Character- istics Requirements for Equipment MI L-STD-704 Electric Power, Aircraft, Characteristics and Utilization of MIL-STD-810 Envi ronmental Test Methods MS33586 Metals, Definition of Dissimilar MS33649 Bosses, Fluid Connection - Inter
7、nal Straight Thread MS33678 Connector, Receptacle, Electric, Internal Mounting (Copies of documents required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) 3. REQUIREMENTS 3.1 Pre roduction. Th
8、is specification makes provisions for pre- production + testing. he type of testing shall be as specified in the detai 1 speci f ication. 3.2 . Selection of speclfications and standards., Specifications and standards for necessary commodities and services not specifled herein shall be selected in ac
9、cordance with MIL-STO-143. 3.3 Materials. 3.3.1 Nonmagnetic materials. Nonmagnetic materials shall be used, for all parts of the transmitter except where magnetic materials are essential. -3.3.2 Nonfeyrous materials; Nonferrous materials shll. be used for all parts of the transmitter except where fe
10、rrous materials are essential . 3.3.3 Metals, Metals shall be of a corrosion-resiktant type or be suitabwated to resist corrosion due to fuels, salt spray, or atmospheric conditions encountered in storage or normal service, 3.3.4 Dissimilar metals. Dissimilar metals shall not be used in intimate con
11、tact with each other unless suitably protected against electrolytic corrosion. Dissimilar metals are defined in MS33586. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-T-58097 bb 9999906 0/112518 MIL-T-58097( AV) 3.3.5 Toxic and corrosive fumes
12、. The transmitter shall be of such materjal and construction that when burned, fumes or gases that combine with the atmosphere to form acid or corrosive alkali will not be 1 i berated. of the transmitter that are subject to deterioration when exposed to climatic and environmental conditions likely t
13、o occur during service usage, shall be protected against such deterioration in a manner that will in no way prevent compliance with performance requirements of this specification. The use of any protective coating that will crack, chip, or scale with age or extremes of climatic and environmental con
14、ditions shall be avoided. 3.3.6 Protective treatment. Materials used in the construction 3.4 Design and construction. 3.4.1 Desi n. The transmitter shall be designed to sense the measurement into an electrical signal for use of indicators conform- ing to MIL-1-58098. The transmitter shall not requir
15、e use of an ampli- fier to provide this signal to the indicator. The transmitter shall be of simple design and shall be easy to maintain. Bearings, gears, or parts that are subject to frictional wear or brinelling shall not be used. Elastic constraints shall be used for guidance and control of all m
16、oving parts. differential + o two pressures and to convert differential pressure 3.4.1.1 Adjustments. The transmitter shall not require periodic adjustments, such as .for manually set bridge-balance potentiometer. However, a means shall be provided for adjusting and correcting indi- cations over a m
17、inimum total of 10 percent of full-scale which shall be simple to manipulate and of such design that adjustments can be made with a minimum of special tools. specified herein in either vertical or horizontal positions. 3.4.1.2 OPeratins Dosition. The transmitter shall operate as 3.4.1.3 Overpressure
18、 stop; An overpressure stop shall be pro- vided to restrain the prime mover within a range of 105 to 130 precent of full -scale deflection. 3.4.1.4 Lubrication. The transmitter shall be designed so that 3.4.2 Construction. The transmitter shall be so constructed that no periodic lubrication will be
19、required during service. no parts will -work loose in service, strains, jars, vibrations, and other conditions incident to handling, shipment, storage, installation, and service. It shall be built to withstand 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license fro
20、m IHS-,-,-MIL-T-58077 bb W 77777Ob 03q2537 T W 3,4,2.1 Joncorrosive sealing. The electrlcal system of the transmitter shall be isolated from both pressure compartments and atmosphere by a hermetic seal, The pressure sensing element and any part in contact with the pressure medium shall be constructe
21、d of materials that will resist corrosive actions of alcohol9 air- craft fuels and oils, and hydraulic fluid. herein after subjection to the following conditions: 3.5 Performance, The transmitter shall operate as specified a. Temperatgres - operation at temperatures ranging from -54 to +165oC and st
22、orage at temperatures ranging from -62O to t232OC b. Vibration - vibration of 20gs from 5 to 2,000 Hz c. Temperature-al ti tude - pressure equivalent to a 35,000 foot altitude at -55OC d. Humidity - relative humidity of 95 percent e. Salt fog - exposure to salt sea atmosphere for 48 hours .f. Fungus
23、 - fungus growth encountered in tropical cl imates 3.5.1 Tolerances. The transmitter shall operate within to1 - 3.5.2 Damping. Tbe time required for change from full-scale erances specified in the detail specification. . , pointer deflection (251 ) to 35O shall not exceed 2 5 1 second under the cond
24、itions specified in section 4, . 3.5.3 Vent boss and-connector strenqth. The vent boss and con- nector shall withstand 25 foot-pounds bending moment applied to the. vent boss and connector without evidence of calibration shifting out of tolerance, distortion of base plate, or damage to welds and sol
25、der- ing. cent overpressure for a period of 10 minutes without exceed scale error tolerance specified in the detail specification. case leakage shall not exceed 0.1 micron cubic foot per hour. 3.5.4 Overpressure. The transmitter shall withstand a 100 p.er- 3.5.5 Case leakage. For hermetically sealed
26、 transmittersr the c 4 I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-58097 bb 7799906 OLLi2520 b W 3.5.6 D-m. The transmitter shall withstand ap- plication of 200V mis at a comercial frequency for. a period of 5 minutes. power supply variat
27、ions of MIL-SfD-704 within tolerances specified in the detail specification. 3.5.7 djumA 4.5.10 Seasoning. The transmitter shall be operated for 10,000 cycles at a rate of 30 + 10 cpm from zero indication to 80 f. 5 per- cent of full-scale and Lack to zero indication. Within l hour after conclusion
28、of this test, the transmitter shall be subjected to scale error test. Errors shall not exceed tolerances specified in the de- tail specification. The transmitter shall then be examined to deter- mine that no undue wear has occurred. 11 Provided by IHSNot for ResaleNo reproduction or networking permi
29、tted without license from IHS-,-,-MIL-T-58097( AV) 4.5.11 Endurance. The transmitter shall be subjected to an endurance test in accordance with 4.5.10 except it shall be oper- ated for 60,000 cycles in lieu of 10,000 cycles. 4.5.12 Temperature-al ti tude. The temperature-al titude test shall be cond
30、ucted in accordance with MIL-STD-810, method 504, pro- cedure Z (except temperature shall be -55OC) with chamber pressure equivalent to an altitude of 35,000 feet. Rate ofpressure change shall not exceed an average of 3 psi per second while under these conditions. At the end of a 1-hour period, a sc
31、ale and friction error test shall be conducted. Errors shall not exceed tolerances specified in the detail specification. This test may be conducted concurrently with the low temperature exposure test. test shall be conducted in accordance with MIL-STD-810, method 502, procedure I. Transmitter shall
32、 be exposed to a temperature of -620 plus or minus 2OC for a minimum of 48 hours after which it shall be operated throughout its range while at the s eclfied temperature. maintained at this temperature for a minimum of 24 hours, At end of 24 hour period, the transmitter output shall be within low-te
33、mpera- ture accuracy tolerances specf fied in the detail specificatlon. Trans- mitter shall be returned to room temperature for a minimum period of 4 hours and then subjected to the scale error test. Scale errors shall not exceed tolerances specified in the detail specification for room temperature.
34、 4.5.13 Low temperature exposure. The low temperature exposure Temperature shall then be raised to -54O 5 2 g C and the transmltter 4.5.14 Hiah temiierature exiiosure. The transmitter shall be placed in a temperature chamber and subjected to 232O t 10C for a period of 80 hours. It shall then be retu
35、rned to room-temperature for a minimum of 4 hours after which it shall be subjected to scale error test. Error shall not exceed room temperature tolerances speci- fied in the detail specification. 4.5.15 Humidi tv. Nonhermetical ly . sealed transmitters shall be Imnediqtely after completion subjecte
36、d to a humidity test in accordance with MIL-STD-810, method 507, procedure I. External connections to the transmftter shall be made to simulate instal led conditions. of this test, the transmitter shall be subjected to dielectric strength, and scale and friction error tests. Errors shall not exceed
37、toler- ances specified in the detail specification. 4.5*16 Salt fa The transmitter shall be subjected to a salt - fog test in accor _ag ance with MIL-STD-810, method 509, procedure I, for a period of 50 hours. The transmitter shall be examined and there 12 J Provided by IHSNot for ResaleNo reproduct
38、ion or networking permitted without license from IHS-,-,- - MIL-T-58097 66 9999906 OLLi2528 O MIL-T-58097( AV) shall be no evidence of external corrosion or deteriration that would affect subsequent operation. External surface of the trans- mitter may be washed with distilled water and air-dried aft
39、er which it shall be subjected to the dielectric strength test. Measured resistance shall be a minimum of 20 megohms. 4.5.17 Funqus. Nonhemetically sealed transmitters shall be subjected to a fungus test in accordance with MIL-STD-810, method 508, procedure I, after completion of the qualification o
40、r prepro- duction tests (as applicable). The instrument shall previously have r. been subjected to salt fog test. The transmitter shall be disassem- bled so that internal mechanism will be exposed to the fungus spores. At end of the test period, the transmitter shall be examined to de- termine that
41、no fungus growth has occurred. subjected to a radio noise interference test in accordance with MIL-STD-461 except that radiated noise shall be within the range of O. 15 to 150 megacycles. 4.5.18 Radio noise interference. The transmitter shall Le 4.5.19 Power supply variations. The transmitter shall
42、meet scale erroc and friction tolerances specified in the detail specifi- cation when subjected to power supply. variations as specified in MI L-STD- 704. 4.5.20 Vent boss and connectop strength. The vent boss and connector mounting shall be sufficiently rigid to withstand a force of 25 foot-pounds
43、bending moment applied in any direction perpendic- ular to longitudinal axis of the transmitter without evidence of calibration shifting-out-of tolerance, distortion- of base plate, or damage to vent boss and connector welds or soldering. This test shall be conducted with the transmitter secured by
44、engine mount connection or adjacent hex nut only. The transmitter shall then be subjected to sealing test at ambient temperature, Scale error shall not ex- ceed tolerances for ambient temperature specified in the detail speci- fi Ca ti on. 4.5.21 Overpressure. lhe transmitter shall be subjected to 1
45、00 percent overpressure for a-period of 10 minutes. At least 1 hour after conclusion of this test, the transmitter shall be subjected to scale-error test using increasing pressure only. Error shall not exceed tolerances specified in the detail specif9cation. 13 Provided by IHSNot for ResaleNo reprod
46、uction or networking permitted without license from IHS-,-,-4,5.22 Dam in A pressure sufficient to produce full-scale deflectJon sha + 1 be applied to the transmitter and released by a quick-release valve. Time required for change from 2510 (full- scale deflection) to 350 shall be 2 2 1 seconds. The
47、 transmitter shall be tested in a test rig confoming to Figure 6 with trans- mitter in an upright position (vent at the top and pressure con- nection at the bottom-) Lubricating oil used for this test shall conform to MIL-L-7808 and shall have a viscosity of approximately 2,500 centistokes at -54OC.
48、 fest to be performed at room temper- ature. 5. PREPARATION FOR DELIVERY 5.1 Preservation- and packaging, Preservation and packaging 5.1.1 Reinspection date. Reinspection date markings shall 6. NOTES 6.1 Intended use. The transmitters covered by this specif- ication are Intended for use with variabl
49、e-reluctance-type indicators conforming to MIL-1-58098 in providing remote indication of aircraft pressure functons. Q,Z Ordering data. Ordering data shall be as specified in the detail specification, 6 . 2 . 1 Contvact data resurements. Contract data requirements shall be as specified in the detail specification. shall be as specified in the contract or order (see 6.2), be in accordance with the tnstructions of the proc
