1、AMSC N/A FSC 6610 MIL-PRF-83174E 24 April 2012 SUPERSEDING MIL-PRF-83174D 11 May 2007 PERFORMANCE SPECIFICATION TRANSMITTER, ACCELEROMETER, AXIAL INCH-POUND Comments, suggestions, or questions on this document should be addressed to Oklahoma City Air Logistics Center/ENSDAA, 3001 Staff Drive, Tinker
2、 AFB, OK 73145 or e-mailed to af71tinker.af.mil. Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at https:/assist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license
3、from IHS-,-,-MIL-PRF-83174E 2 This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers three types of axial accelerometer transmitters. 1.2 Classification. Transmitters will be of the following types, as specif
4、ied (see 6.2): TRU-106/A-1 Senses normal acceleration (-3.0 to +9.0g) TRU-106/A-2 Senses normal acceleration (-1.0 to +4.0g) TRU-107/A Senses transverse acceleration (-1.0 to +1.0g) 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this
5、 specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified req
6、uirements of the documents cited in sections 3, 4, or 5 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein.
7、 Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. DEPARTMENT OF DEFENSE STANDARDS MIL-STD-461 - Requirements for the Control of Electromagnetic Interference Characteristics of Subsystems and Equipment MIL-STD-704 - Aircraft Electrical Power C
8、haracteristics (Copies of these documents are available online at https:/assist.daps.dla.mil or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094) 2.3 Non-Government publications. The following documents form a part of this document to the ext
9、ent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-83174E 3 ASTM INTERNATIONAL ASTM-B117 - Salt Spray (Fog) Apparatu
10、s, Operating (DoD adopted) (ASTM documents may be obtained online at www.astm.org or addressed to the American Society for Testing and Material, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.) 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conf
11、lict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.2)
12、, a sample shall be subjected to first article inspection in accordance with 4.2. 3.2 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible, provided that the material meets or exceeds
13、the operational and maintenance requirements, and promotes economically advantageous life cycle costs. 3.3 Materials. Unless otherwise specified, nonmagnetic and nonferrous materials shall be used. Materials shall not produce deleterious fumes and shall be suitably treated to resist corrosion due to
14、 electrolytic decomposition, fungus, salt spray, and any other conditions that may be encountered during operation, use, or storage. Nonferrous materials contained within hermetically sealed enclosures shall be considered suitably protected from corrosion. 3.4 Interface. 3.4.1 Dimensions. The transm
15、itter shall conform to the dimensions in Figure 1. 3.4.2 Visual. The transmitter shall possess an aligning device to prevent misorientation or misalignment of the transmitter during installation (see Figure 1). 3.4.3 Connectors. The electrical connector for the TRU-106/A shall conform to part number
16、 MS3113H12C10P. A connector conforming to part number MS3113H12C10PX (for new design, use MS3474 connector type) shall be used on the TRU-107/A. The transmitter connections shall be in accordance with Table I. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from
17、IHS-,-,-MIL-PRF-83174E 4 TABLE I. Transmitter connections. Connector Pins Function A B C D E F G H 28 V power return 28V power Signal output Signal ground Test (if required) Test (if required) Case Spare 3.4.4 Mounting screws and holes. Non-reflective, round-head, brass machine screws conforming to
18、.190-32UNF-2A shall be used to mount the transmitter on a 3/16-inch thick panel and shall be provided with each transmitter. Screws shall be attached securely to the transmitter. 3.4.5 Weight. The transmitter shall not exceed 0.5 pound. 3.4.6 Power. The transmitter shall operate on 28V dc power, sup
19、plied externally, and operate continuously at dc voltages ranging from 25 to 31. Power characteristics shall conform to MIL-STD-704. 3.5 Environmental conditions. The transmitter shall be capable of operation under the following conditions. a. Operational temperatures ranging from -65 to 160F and st
20、orage temperatures of -80 to 205F. b. Altitudes from -1,200 to 80,000 feet. c. Relative humidity up to 95%. d. Rainfall of up to 5 inches per hour at 40 mph. e. Exposure to salt atmosphere between a pH of 6.5 and 7.2 at 95F. f. Exposure to blowing dust at a velocity up to 5,700 ft/min at a concentra
21、tion of 0.3 0.2 g/ft3. g. Exposure to blowing sand at a velocity up to 5,700 ft/min at a concentration of 0.0623 0.015 g/ft3. h. Vibration of 0.15 g2/Hz cycled from 300 to 1,000 Hz then decreasing at a rate of -9 dB per octave to 2,000 Hz. i. Acceleration force of 10g for 1 minute duration. Provided
22、 by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-83174E 5 j. Application of 500V dc for 10 seconds duration. k. Thermal shock consisting of rapid temperature changes between 41 and 185F. 3.6 Performance. 3.6.1 Ranges. The transmitter shall measure nor
23、mal linear acceleration as shown in Table II. Accelerometer shall withstand over range acceleration as shown in Table II without changing the accuracy of the output. In addition, the transmitter shall withstand at least 50% over range in any axis. TABLE II. Ranges. Accelerometer Normal range (g) Ove
24、r range (g) TRU-106/A-1 -3.0 to +9.0 -4.5 to +13.5 TRU-106/A-2 -1.0 to +4.0 -1.5 to +6.0 TRU-107/A -1.0 to +1.0 -1.5 to +1.5 3.6.2 Resolution. The resolution shall be 0.02% or better of full scale. 3.6.3 Static performance. When the transmitter is properly mounted in the aircraft, the electrical out
25、put under static conditions shall indicate +1g in the normal axis (see 6.3). 3.6.4 Reliability. The transmitter shall have a minimum mean time between failures (MTBF) of 10,000 hours. 3.6.5 Maintainability. No special tools shall be required for the installation or replacement of the transmitter. 3.
26、6.6 Axis alignment. The alignment of the transmitter shall be within 1/4 from the sensitive axis. 3.6.7 Accuracy. The maximum allowable deviation (output error) shall be 1.0% or less of full scale. 3.6.8 Electromagnetic interference. The transmitter shall neither cause nor be susceptible to electrom
27、agnetic interference. 3.6.9 Repeatability. The difference between transmitter output readings shall be less than 0.20% of full scale when the input is reapplied. 3.6.10 Frequency response. Frequency response of the transmitter in any axis shall be flat within 1.5% of static response from 0 to 8 Hz a
28、t room temperature, 3.0% over the specified temperature range, and shall be down 18 dB or more at 16 Hz. Thereafter, the roll-off approach shall be 36 dB per octave. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-83174E 6 3.6.11 Cross-axis a
29、cceleration. The transmitter output shall not change more than 0.005g for each 1g of cross-axis acceleration (90 to the sensitive axis). 3.6.12 Magnetic effect. When the transmitter is held in a magnetic field having a horizontal intensity of 0.18 0.01 oersted, in various positions, oriented magneti
30、cally east or west and not more than 12 inches from the center of a free magnet, the deflection of the magnet shall not exceed 5 degrees. 3.6.13 Output impedance. At full scale output the transmitter shall have an output impedance of less than or equal to 0.5 ohm when driving a 1,000 1% ohm load. 3.
31、6.14 Electrical output. The output of the transmitter shall be a dc voltage directly proportional to the acceleration on the sensitive axis. The electrical output range shall not exceed 10V dc (see 3.6.1). The required input-output characteristics are shown in Table IV. 3.6.15 Interchangeability. Al
32、l parts having the same manufacturers part number shall be functionally and dimensionally interchangeable. 3.6.16 Case. The case shall be hermetically sealed to prevent atmospheric involvement in operation. 3.6.17 Leakage. The transmitter seals shall allow no more than a 10% change of pressure over
33、1,000 hours with a pressure differential of 1 atmosphere. 4. VERIFICATION 4.1 Classification of inspections. The inspection requirements specified herein are classified as follows: a. First article inspection (see 4.2). b. Conformance inspection (see 4.3) 4.2 First article inspection. First article
34、inspection shall be performed on at least 13 transmitters of each type represented. Three of the transmitters shall be subjected to tests indicated in 4.6, except 4.6.18. The remaining transmitters (10 minimum) shall be subjected only to test 4.6.18. 4.3 Conformance inspection. Conformance inspectio
35、n shall include the tests indicated in 4.3.1 and 4.3.2. 4.3.1 Individual tests. Each transmitter shall be subjected to the tests indicated in 4.6.1 through 4.6.6. 4.3.2 Sampling tests. Transmitters shall be selected as indicated below and subjected to all of the tests specified in 4.6, except 4.6.18
36、. In addition, 6 of each group of up to 200 shall be selected and tested according to 4.6.18. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-83174E 7 Number of items Quantity of each type number First 10 1 Next 90 2 Each additional 100 2 4.4
37、 Inspection conditions. Unless otherwise specified, all inspections shall be performed in accordance with the test conditions specified in 4.4.1, 4.4.2, and 4.4.3. 4.4.1 Voltage input. The transmitter shall be tested with 28V dc power input. 4.4.2 Attitude. The transmitter shall be tested in its nor
38、mal operating position. 4.4.3 Environmental tests. Prior to performing environmental tests, the transmitter shall be operated under ambient conditions at the test site for baseline data. 4.5 Requirements cross-reference matrix. Table III provides a cross-reference matrix of section 3 requirements te
39、sted or verified in the paragraphs below. TABLE III. Requirements cross-reference matrix. REQUIREMENT VERIFICATION 3.1 4.2 3.3 4.6.1 3.4 4.6.17 3.5 4.6.9, 4.6.10, 4.6.11, 4.6.14, 4.6.15 3.6.1 4.6.3, 4.6.5 3.6.2 4.6.3 3.6.3 4.6.3 3.6.4 4.6.18 3.6.5 4.6.1 3.6.6 4.6.1 3.6.7 4.6.3 3.6.8 4.6.13 3.6.9 4.6
40、.4 3.6.10 4.6.3 3.6.11 4.6.6 3.6.12 4.6.8 3.6.13 4.6.12 3.6.14 4.6.3 3.6.15 4.6.1 3.6.16 4.6.2, 4.6.16 3.6.17 4.6.2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-83174E 8 4.6 Tests. 4.6.1 Examination of product. The transmitter shall be exa
41、mined for damage and defects. Noncompliance with any requirement or presence of one or more defects shall constitute cause for rejection. 4.6.2 Leakage test. Using a leak detector, the initial maximum detected leak rate at a differential pressure of 1 atmosphere shall not allow greater than a 10% ch
42、ange in internal pressure over 1,000 hours with a pressure differential of 1 atmosphere. 4.6.3 Accuracy test. 4.6.3.1 TRU-106/A. The TRU-106/A transmitter shall be mounted on a test stand in the normal operating position and subjected to inputs throughout its complete normal acceleration range and p
43、roduce outputs as shown in Table IV. 4.6.3.2 TRU-107/A. The TRU-107/A transmitter shall be mounted on a test stand in the transverse operating position and subjected to inputs throughout its complete normal acceleration range and produce outputs as shown in Table IV. TABLE IV. Transmitter output. Tr
44、ansmitter Input acceleration (g) Output voltage (V) 0.1 TRU-106/A-1 -3 -1 0 +1 +3 +5 +7 +9 -1.67 -0.56 0.00 +0.56 +1.68 +2.78 +3.89 +5.00 TRU-106/A-2 -1 0 +1 +2 +3 +4 -1.25 0.00 +1.25 +2.50 +3.75 +5.00 TRU-107/A -1.0 -0.5 +0.0 +0.5 +1.0 -5.00 -2.50 0.00 +2.50 +5.00 Provided by IHSNot for ResaleNo re
45、production or networking permitted without license from IHS-,-,-MIL-PRF-83174E 9 4.6.4 Repeatability. 4.6.4.1 Normal acceleration. The TRU-106/A transmitter shall be mounted on a test stand so that it is sensitive in the normal axis and shall be properly connected with power applied. Acceleration in
46、puts shall be applied to TRU-106/A-1 at -3, 0, +3, +7, and +9g consecutively, and to TRU-106/A-2 at -1, 0, +1, +2, +3, and +4g consecutively. At each of these accelerations, the output shall be recorded and the procedure repeated two times. The readings obtained in 4.6.3 shall not vary from the aver
47、age of these three readings by more than 0.2% of full scale or 10 mV. 4.6.4.2 Transverse acceleration. The TRU-107/A transmitter shall be mounted on a test stand so that it is sensitive in the transverse axis and shall be properly connected with power applied. Acceleration inputs shall be applied to
48、 the transmitter at -1, 0, and +1g consecutively. At each of these accelerations, the output shall be recorded and the procedure repeated two times. The readings obtained in 4.6.3 shall not vary from the average of these three readings by more than 0.2% of full scale or 10 mV. 4.6.5 Over-range accel
49、eration. The transmitter shall be mounted on the test stand with power applied so that it senses accelerations applicable to the type tested. Over-range accelerations shall then be applied to the transmitter, and the output shall be noted. The test points for each transmitter and the outputs shall be as specified in Table V. TAB
