1、MIL-P-2457 13 77777Ob Oq33710 b P 5. F Code Ident MIL-P-82459 (OS) 10001 28 July 1966 Superseding WS-4829 MILITARY SPECIFICATION 3 May 1966 i i PRESSURE TRANSDUCER r- $i! (For Torpedo MK46 Mod O and Mod.1) 1. SCOPE 1.1 This specification covers requirements for the procurement of one type I of press
2、ure transducer (see 6,l. 2), 2, . APPLICABLE DOCUMENTS 2.1 The following documents of the issue in effect on date of invitation for bids form a part of this specification to the extent specified herein. SPECIFICATIONS Military MIL-H -5 6 06 MIL-P-116 Preservation, Method of MIL-P-18177 Plastic sheet
3、, Laminated, Thermosetting, Hydraulic Fluid, Petroleum Base, Air- . craft, Missile, and Or 147, 3.2.3 Inspection and test equipment and facilities, The supplier shall furnish and maintain all necessary inspection and test equipment and facilities and provide personnel for performing all acceptance t
4、ests specified herein, The test equipment shall be adequate to permit performance of the required accept- ance tests for the pressure. transducer, 3,2,4 Dissimilar metals, Unless suitably protected against electrolytic corrosion, dissimilar metals shall not be used in contact with each other. Dis- s
5、imilar metals are defined in Standard MS33586. 3.2,5 Soldering. All solder connections shall be made in accordance with MIL-STD-440. . 3,2.6 Fungus proof material. Materials that are nutrients for fungi shall . not be used unless necessary. Where used and not hermetically sealed they shall be treate
6、d with a fungicidal agent, 3.3 Performance and product characteristics. 3.3.1 Physical characteristics, The pressure transducer shall conform 3,3; 1.1 to the physical requirements delineated on BuWeps Drawing 2539249. r, Using hydraulic oil per Specification MIL-H-5606, the change in volume required
7、 to pressurize the unit from O to 750 psig shall not exceed O. 030 cubic inches, 3.3.2 Pressure medium. Th; pressure transducer shall meet all require- ments specified herein using any pressure medium as follows: (a) (b) Hydraulic OiI per Specification MIL-H-5606. Sea water at temperatures above 27
8、degrees F. (c) Dry nitrogen. 3.3,3 Electrical requirements. All requirements are to be met the first time a measurement is made, Cycling to condition the unit prior to a test is not acceptable, I 3,3,3.1 Potentiometer, The potentiometer shall: (a) Meet ail requirements with 23 to 33 volts direct cur
9、rent (vdc) or volts root-mean-square (vrms) at 4800 *lo0 cycles per second (cps) steady state over a temperature range of O to 168 degrees F, 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-824.59 (OS) (b) Be capable of withstanding 55 vrms a
10、t 4800 hl00 cps for 5 seconds over a temperature range of O to 168 degrees F each time the unit is energized, (c) Be wirewound type. 3,3,3,1,2 DC resistance, terminal 1 to terminal 3, (see figure 1) shall be 5000 rt250 ohms at 79 degrees F. Temperature coefficient shall be IO, 035 percent per degree
11、 F maximum. 3,3,3,1,3 Impedance between terminal 1 and terminal 3 shall be 5000 I300 ohms at 26 -12 vrms, 4800 I100 cps. 3,3,3.1.4 Resolution shall be O. O to 1, O pound per square inch (psi) over a temperature range of O to 168 degrees F. The potentiometer shall be wound with 600 turns minimum over
12、 its active range, 3.3.3.1.5 Repeatability including incremental hysteresis when cycling over any 20-30 psi range shall not exceed 2, O psi over a temperature range of O to 168 degrees F, This requirement includes resolution and all other conditions with no vibration and the case temperature held co
13、nstant within rt5 degrees F, 3.3,3.1,6 Wiper shall withstand 10 ma dc or rms continuously and meet requirements of 3.3 after removal of the current, 3.3,3,1.7 Noise generated during operation f the potentiometer shall not exceed 300 ohms equivalent noise resistance (see 6,3.14). This requirement sha
14、ll apply with the following simultaneous conditions or any combination thereof: (a) Pressure rate of O. O to 30, O psi per second, (b) (c) Wiper current of 100 h10 microamperes (ua) dc. Noise spectrum; low pass with 50 I5 kilocycles (kc) cutoff with a nominal slope of 6 db per octave beyond 50 kc. (
15、d) (e) Vibration as described in operating vibration schedule of table I. Temperature range of O to 168 degrees F. 3.3.3.1.8 Total error in ratio of outputvoltage (terminals 1 and 2) to applied input voltage (terminals 1 and 3) shall not exceed limits specified in figure 1. This requirement shall ap
16、ply with the following conditions: (a) Load (terminal 1 to 2); greater than 9 megohms, (b) Errors due to nonlinearity, hysteresis, resolution or any other condition except test equipment, (c) Environmental conditions as follows, 4 Provided by IHSNot for ResaleNo reproduction or networking permitted
17、without license from IHS-,-,-. MIL-P-82457 33 797970b 0433734 3 a v P MIL-P-82459 (OS) Figure 1. Potentiometer Characteristics -52 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4 MIL-P-2457 13 9777706 0433735 5 1 1 MIL-P-$24.59 (OS) 1, Temperatur
18、e; 65 to 80 degrees F 2. Vibration; none 3. Altitude; . Normal ground atmospheric 4, Humidity; Room ambient, up to 95 percent pressure 24 to 32 inches mercury (d) Applies for increasing pressure and at O psig and 500 psig. 3,3,3,1,9 The transducer shall not require more than a 2.5 psi adjustment in
19、pressure from the pressure at 79 *3 degrees F required to obtain any voltage ratio when tested in accordance with 4.7, This applies at any temperature in the range from O to 168 degrees F other than specified in 3,3.3.1.8(c)l. 3.3.3.2 Switches. 3.3.3.2.1 Each switch shall close (see 6,3.8) within th
20、e specified range as pressure increases from zero psig or any pressure less than the specified pressure and shall remain closed for pressures greater than the specified range, Each switch shall open (see 6,3.9) within the specified range as pressure de.creases from 750 psig or my pressure above the
21、specified range to 750 psig and shall remain open for pressure less than the specified range including errors due to any condition except test equipment, 3.3.3.2.2 Operating (specified) range at the environmental condition of 3,3,3,1,8 shall be: S1:. 8.9 to 12.5 psig S2: 22.3 to 25.8 psig S3: 42.7 t
22、o 46.3 psig 3.3,3,2,3 Operating (specified) rage at any other temperature in the range from O to 168 degrees F shall be: 7.5 to 14. O psig 21. O to 27.5 psig 3,3.3.2.4 Switch contact resistance shall not exceed 10. O ohms at 3, O +O, 2 S1: S2: S3: 41. O to 48. O psig . ma dc at any pressure greater
23、than the pressure specified in 3,3.3,2.2 and 3,3,3,2,3. 3,3,3.2.5 Each switch shall meet all requirements when switching 5. O (Energized per 4.5.2.8) Operating (Energized per 4.5,2.8) 3.4.2 Shock, The packaged pressure transducer csee 5. i. 1) shall be capable of withstanding the shock of being drop
24、ped on a nonyielding surface from a height of 36 inches. Additionally, the pressure transducer, in the con- dition shown in table II, shall withstand shocks specified in table II. Double Amplitude Acceleration Frequency (in) minimum (g) minimum 1, o 5-60 o. 2 - 5 -17 3. O 17 -40 O, 036 - 40-74 10, o
25、 74-500 - - - O. 050 - 5-20 - 1. o 20-32 o. 020 - 32-56 - 3. o 56-500 Table II Condition (See 6.3, i) Ready nonoperating Ready b Number (gs) *lo% (milEiseconds) Direction* Impacts Peak Magnitude Duration Acceleration of 60 - 8. O to 10. O 3 fwd or aft axis 3 left or right axis 3 up or down axis 9 45
26、 18. O to 20. O Long. fwd axis 3 85 O. 5 to 1.5 3 up or down axis 6 3 right or left axis 300 , O. 5 to i. 5 Long. aft axis 3 3,4.3 Acceleration, The pressure transducer shall be capable of with- standing accelerations specified in table III. 9 Provided by IHSNot for ResaleNo reproduction or networki
27、ng permitted without license from IHS-,-,- MIL-P-2457 33 777770b 0433737 2 = 1c Magnitude Acceleration Condition (gs) *IO% Direction Ready 25 Longitudinal Fwd Ready nonoperating 35 Longitudinal Aft - Table III Acceleration Schedule 3,4.4 Temperature. The pressure transducer shall be capable of with-
28、 standing temperatures for condition specified, 3.4.4.1 Nonoperating and ready nonoperating, The pressure transducer shall be capable of withstanding ambient temperatures between -45 and +140 degrees F. 3.4.4,2 Ready and operating. The pressure transducer, when operated in an environment with a temp
29、erature between O degree F and 168 degrees F, shall meet performance and product characteristics of this specification after exposures to temperatures between zero degree F and +I40 degrees F. 3.4,5 Pressure. 3.4.5.1 The pressure transducer shall be capable of withstaqding pressures from 2.7 to 20.
30、O psia externally with or without the operating medium being applied. 3,4.5.2 The pressure transducer shall be capable of withstanding a vac- uum of 26 to 28 inches of mercury (Hg) though the pressure fitting for thirty min- utes minimum with normal ground atmospheric pressure, 24 to 32 inches Hg, e
31、xternally. 3.4.5.3 The pressure transducer shall be capable of withstanding a burst pressure (see 6,3.10) of 1000 psig. 3.4,6 Humidity and salt laden atmosphere. The pressure transducer shall withstand exposure to salt laden atmosphere such as encountered in a shore inst all at ion. 3.4.7 Salt water
32、. The unit shall show no deterioration in performance or physical integrity as the result of salt water being used as a pressure media. 3.5 WorkmanshiE. Workmanship and finish shall be of sufficiently high grade to assure satisfactory operation consistent with requirements of this specification. All
33、 parts used in the pressure transducer shall be thoroughly clean and free of ex- cess materials, chips, and loose or spattered foreign materials, Standards of work- manship exhibited in any approved preproduction sample, subject to any qualifications stated in the Governments notice of approval, sha
34、ll be determinative 10 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-82V57 13 m 7777706 0433720 7 m * 1 MIL-P-82459 (OS) of requirements of the contract relative to workmanship insofar as not specifically covered by applicable specifications
35、4. QUALITY ASSURANCE PROVISIONS 4,l Responsibility for inspection. Unless otherwise specified in contract or purchase order, the supplier is responsible for performance of all inspection requirements as specified herein. Except as otherwise specified, the supplier may utilize his own facilities or a
36、ny commercial laboratory acceptable to the Government. The Government reserves the right to perform any of the inspec- tions set forth in this specification, where such inspections are deemed necessary to assure that supplies and services conform to prescribed requirements, 4.2 Classification of ins
37、pections. Inspections of the pressure transducer shall be classified as follows: (a) Preproduction inspection. , 1. Preproduction sample (see 4.3.1) 2. Preproduction test (see 4.5) (b) Periodic production inspection. 1, 2. Periodic production sampling (see 4.3.2) Periodic production tests (see 4.6)
38、(c) Acceptance inspection, 1, Acceptance sampling (see 4.3.3) c 2. Acceptance tests and examinations (see 4.7) 4.3 Sampling, 4.3,l Preproduction sample A preproduction sample of three pressure transducers, manufactured in accordance with 3.1 shall be subjected to prepro- duction tests detailed in 4.
39、5 at an activity designated by the procuring activity, Acceptance of the preproduction sample shall be based on no defects in the sample, Further production of the pressure transducer by the supplier, prior to approval of the preproduction sample, shall be at supplierls risk, 4,3.2 Periodic producti
40、on sampling, Periodic production samples shall be selected from pressure transducers that have satisfactorily passed quality conformance inspctions of 4.7, These samples shall be subjected to the tests of 4.6 at an activity designated by the procuring activity. Periodic production sampling shall be
41、as follows: (a) Step 1. Upon initiation of production, randomly select 1 unit from each group of 30 units, Upon satisfactory compliance of samples selected from 3 consecutive groups, shift to Step 2, Each sample so selected shall be numbered consecutively starting with Sample Number 1. 11 Provided b
42、y IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_I_ MIL-P-2953 13 M 377370b 0933921 O M I MIL-P-82459 (OS) I (b) Step.2. Randomly select 1 unit from each group of 70 units. Continue with Step 2 for the balance of the contract or until a defective unit is found
43、. Each sample so selected shall be numbered consecutively, starting with a sample number one greater than the highest sample number selected in Step 1. 4.3,2.1 Defective units, When a defective unit (see 6.3.18) is found in any group, acceptance of all units on hand shall be withheld and the contrac
44、tor shall: (a) (b) Determine the cause of the defect, Take the necessary actions to correct or eliminate the defect from all units on hand and, if so directed by the procuring activity, from those units previously shipped. (c) Submit to the procuring activity for approval, the proposed corrective ac
45、tion to prevent recurrence of the. defect. (d) Submit to the procuring activity for approval the proposed retest pro- gram to verify that the correctiveaction eliminated the defect. (e). Return to Step 1 and proceed as indicated when inspection is resumed, 4.3.3 Acceptance sampling. Tests and examin
46、ations specified in 4.7 shall be conducted on each pressure transducer to be delivered; therefore, there shall be no sampling plan for acceptance. Defective units shall be rejected, . 4.4 Test conditions, Unless otherwise specified, the pressure transducer shall be subjected to tests under following
47、 conditions: (a) Temperature (b) Humidity (Relative) Room ambient (65 to 80 degrees F) Room ambient, up to 95 percent (c) Altitude Normal ground atmospheric pressure (d) Vibrations None (unless otherwise specified) (e) Switch Load (f) Potentiometer 30 *2 vdc constant voltage source 5. O *O. 2 ma res
48、istive at 30 *2 vdc between terminals 1 .and 3 4,5 Preproduction tests, The pressuretransducer within preproduction sam- ple (identified as pressure transducer 1, 2, and 3) shall be subjected ta testa speci- fiedin tab18 IV attest conditions of 4.4 dess otherwise specified, Certified inspec- tion da
49、ta covering results of preproduction tests shall be forwarded to the activity specified in the contract or order. Certified inspection data shall consist of the following: (a) (b) (c) (d) Date of tests and names of persons conducting the tests. Run or test plan used, Serial number of the pressure transducer. Test results of preproduction tests outlined in table IV. 12 Provided by IHSNot for ResaleNo reproduction or networking pe
