1、 EIA STANDARD TP-28F Vibration Test Procedure for Electrical Connectors and Sockets EIA-364-28F (Revision of EIA-364-28E) January 2011 Electronic Components Industry Association EIA-364-28F ANSI/EIA-364-28F-2011 (R2017) Approved: January 14, 2011 Reaffirmed: February 10, 2017 NOTICE EIA Engineering
2、Standards and Publications are designed to serve the public interest through eliminating misunderstandings between manufacturers and purchasers, facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper product f
3、or his particular need. Existence of such Specifications and Publications shall not in any respect preclude any member or nonmember of ECIA from manufacturing or selling products not conforming to such Specifications and Publications, nor shall the existence of such Specifications and Publications p
4、reclude their voluntary use by those other than ECIA members, whether the Specification is to be used either domestically or internationally. Specifications and Publications are adopted by ECIA in accordance with the American National Standards Institute (ANSI) patent policy. By such action, ECIA do
5、es not assume any liability to any patent owner, nor does it assume any obligation whatever to parties adopting the Specification or Publication. This EIA Specification is considered to have International Standardization implications, but the International Electrotechnical Commission activity has no
6、t progressed to the point where a valid comparison between the EIA Specification and the IEC document can be made. This Specification does not purport to address all safety problems associated with its use or all applicable regulatory requirements. It is the responsibility of the user of this Specif
7、ication to establish appropriate safety and health practices and to determine the applicability of regulatory limitations before its use. (From Standards Proposal No. 5382.04, formulated under the cognizance of the CE-2.0 Committee on EIA National Connector and Sockets Standards) Published by Electr
8、onic Components Industry Association 2017 EIA Standards 3.1.1 A connector plug and its mating connector receptacle. 3.1.2 A printed circuit connector receptacle and its mating connector board(s). 3.1.3 An integral, functional connector assembly. 3.2 Each test sample shall be prepared with wire and o
9、ther materials or processes, simulating application assembly of the sample. If normal connector mating is dependent upon forces external to the connector, then such forces and mounting arrangement shall be as closely duplicated as possible (example: printed circuit connectors). If mating is achieved
10、 with normal locking means, then only normal locking means shall be used. 3.3 Method of mounting 3.3.1 Test conditions I, II, III and IV (sinusoidal evaluation conditions) The specimen shall be attached to a fixture capable of transmitting the vibration conditions specified. The test fixture shall b
11、e designed so that resonant vibration inherent in the fixture within the frequency range specified for the test shall be minor. The magnitude of the applied vibration shall be monitored on the test fixture near the specimen mounting points. The test specimen shall be mounted rigidly to the test fixt
12、ure as specified and shall simulate as closely as possible the normal mounting of the specimen. A minimum of 200 mm (approx 8 in) of wire or cable shall be unsupported on both ends of the connector. For specimens with attached brackets, one of the vibration-test directions shall be parallel to the m
13、ounting surface of the bracket. Vibration input shall be monitored on the mounting fixture in the proximity of the support points of the specimen. 3.3.2 Test conditions V, VI and VII (random excitation conditions) The specimen shall be mounted as specified. The orientation of the specimen or directi
14、on of application of the applied vibration motion shall be specified in one or more directions. If the order of application of the different directions is critical, it also shall be specified. Any special test fixtures or jigs required to run the test shall be specified in sufficient detail to assur
15、e reproducibility of the input motion applied to the specimen. These details shall include the dimensions, the materials, temper, etc., as applicable. EIA-364-28F Page 4 4 Test procedure Tests and measurements before, during and after vibration shall be as specified in the referencing document. 4.1
16、Test conditions I, II, III and IV 4.1.1 Electrical load and discontinuity 4.1.1.1 Unless otherwise specified in the referencing document, an electrical load of 100 milliamperes maximum with a detector capable of detecting a discontinuity of 1.0 microsecond or longer. Said monitoring shall be perform
17、ed in accordance with EIA-.364-46. 4.1.1.2 Unless otherwise specified in the referencing document, low nanosecond event detection shall be performed in accordance with EIA-364-87. A 100 milliamperes test current shall be applied to the areas being monitored. A detector capable of measuring an event
18、resulting in a 10 ohm change lasting longer than 10 nanoseconds, unless otherwise specified in the referencing document. 4.1.1.2.1 Low nanosecond event detection shall not be used as a substitute for the standard 1.0 microsecond requirement. This monitoring test was developed to detect different fai
19、lure mechanisms than that described in 4.1.1.1. It is designed to detect large resistance fluctuations or voltage variations that may result in improper triggering of high speed digital circuits. 4.1.2 Vibration conditions Vibration conditions shall be in accordance with table 1, as applicable. Tabl
20、e 1 - Vibration conditions Test conditions Frequency range, Hz Peak level gn m/s2 I Low - 10 to 55 II High - 10 to 500 10 98.1 III High - 10 to 2,000 15 147.1 IV High - 10 to 2,000 20 196.1 4.1.3 Resonance A critical resonant frequency is that frequency at which any point on the specimen is observed
21、 to have a maximum amplitude more than twice that of the support points. When specified, resonant frequencies shall be determined either by monitoring parameters such as contact opening, or by use of resonance-detecting instrumentation. EIA-364-28F Page 5 4.1.4 Test condition I The specimens shall b
22、e subjected to a simple harmonic motion having an amplitude 1.52 mm (0.06 in) double amplitude (maximum total excursion), the frequency being varied uniformly between the approximate limits of 10 Hz and 55 Hz. The entire frequency range, from 10 Hz to 55 Hz and return to 10 Hz, shall be traversed in
23、 approximately 1 minute. Unless otherwise specified, this motion shall be applied for 2 hours in each of three mutually perpendicular directions (total of 6 hours). If applicable, this test shall be made under electrical load conditions. 4.1.5 Test condition II 98.1 m/s2 (10 gn) peak The specimens,
24、while deenergized or operating under the load conditions specified, shall be subjected to the vibration amplitude, frequency range, and duration specified 4.1.5.1, 4.1.5.2 and 4.1.5.3, respectively; see figures 2 and 3. 4.1.5.1 Amplitude The specimens shall be subjected to a simple harmonic motion h
25、aving an amplitude of either 1.52 mm (0.06 in) double amplitude (maximum total excursion) or 98.1 m/s2 (10 gn) peak, whichever is less. The tolerance on vibration amplitude shall be 10%. 4.1.5.2 Frequency The vibration frequency shall be varied logarithmically between the approximate limits of 10 Hz
26、 and 500 Hz (see 4.1.8) except that the procedure (see 4.1.4) of this standard may be applied during the 10 Hz to 55 Hz band of the vibration frequency range. 4.1.5.3 Sweep time and duration The entire frequency range of 10 Hz to 500 Hz and return to 10 Hz shall be traversed in 15 minutes. This cycl
27、e shall be performed 12 times in each of three mutually perpendicular directions (total of 36 times), so that the motion shall be applied for a total period of approximately 9 hours. Interruptions are permitted provided the requirements for rate of change and test duration are met. Completion of cyc
28、ling within any separate band is permissible before going to the next band. When the procedure (see 4.1.4) is used for the 10 Hz to 55 Hz band, the duration of this portion shall be same as the duration for this band using logarithmic cycling (approximately 1-1/3 hours in each of three mutually perp
29、endicular directions). EIA-364-28F Page 6 4.1.6 Test condition III 147.1 m/s2 (15 gn) peak The specimens, while deenergized or operating under the load conditions specified, shall be subjected to the vibration amplitude, frequency range, and duration specified in 4.1.6.1, 4.1.6.2 and 4.1.6.3, respec
30、tively; see figures 2 and 3. NOTE: g = 0.00201f 2 DA (f = frequency in hertz, DA = double amplitude in mm) Figure 2 - Vibration test curves - high frequency (displacement in mm) EIA-364-28F Page 7 NOTE: g = 0.0512f 2 DA (f = frequency in hertz, DA = double amplitude in inches) Figure 3 - Vibration t
31、est curves - high frequency (displacement in inches) EIA-364-28F Page 8 4.1.6.1 Amplitude The specimens shall be subjected to a simple harmonic motion having an amplitude of either 1.52 mm (0.06 in) double amplitude (maximum total excursion) or 147.1 m/s2 (15 gn) peak, whichever is less. The toleran
32、ce on vibration amplitude shall be 10%. 4.1.6.2 Frequency range The vibration frequency shall be varied logarithmically between the approximate limits of 10 Hz to 2,000 Hz (see 4.1.8) except that the procedure (see 4.1.4) of this standard may be applied during the 10 Hz to 55 Hz band of the vibratio
33、n frequency range. 4.1.6.3 Sweep time and duration The entire frequency range of 10 Hz to 2,000 Hz and return to 10 Hz shall be traversed in 20 minutes. This cycle shall be performed 12 times in each of three mutually perpendicular directions (total of 36 times), so that the motion shall be applied
34、for a total period of approximately 12 hours. Interruptions are permitted provided the requirements for rate of change and test duration are met. Completion of cycling within any separate band is permissible before going to the next band. When the procedure (see 4.1.4) of this standard is used for t
35、he 10 Hz to 55 Hz band, the duration of this portion shall be the same as the duration for this band using logarithmic cycling (approximately 1-1/3 hours in each of three mutually perpendicular directions). 4.1.7 Test condition IV 196.1 m/s2 (20 gn) peak The specimens, while deenergized or operating
36、 under the load conditions specified, shall be subjected to the vibration amplitude, frequency range, and duration specified in 4.1.7.1, 4.1.7.2 and 4.1.7.3, respectively; see figures 2 and 3. 4.1.7.1 Amplitude The specimens shall be subjected to a simple harmonic motion having an amplitude of eithe
37、r 1.52 mm (0.06 in) double amplitude (maximum total excursion) or 196.1 m/s2 (20 gn) peak, whichever is less. The tolerance on vibration amplitude shall be 10%. EIA-364-28F Page 9 4.1.7.2 Frequency range The vibration frequency shall be varied logarithmically between the approximate limits of 10 Hz
38、to 2,000 Hz (see 4.1.8). 4.1.7.3 Sweep time and duration The entire frequency range of 10 Hz to 2,000 Hz and return to 10 Hz shall be traversed in 20 minutes. This cycle shall be performed 12 times in each of three mutually perpendicular directions (total of 36 times), so that the motion shall be ap
39、plied for a total period of approximately 12 hours. Interruptions are permitted provided the requirements for rate of change and test duration are met. Completion of cycling within any separate band is permissible before going to the next band. When the procedure (see 4.1.4.) of this standard is use
40、d for the 10 Hz to 55 Hz band, the duration of this portion shall be the same as the duration for this band using logarithmic cycling (approximately 1-1/3 hours in each of three mutually perpendicular directions). 4.1.8 Alternative procedure for use of linear in place of logarithmic change of freque
41、ncy Linear rate of change of frequency is permissible under the following conditions: 4.1.8.1 The frequency range above 55 Hz shall be subdivided into no fewer than three bands. The ratio of the maximum frequency to the minimum frequency in each band shall be not less than two (2). 4.1.8.2 The rate
42、of change of frequency in Hz per minute shall be constant within any one band. 4.1.8.3 The ratios of the rate of change of frequency of each band to the maximum frequency of that band shall be approximately equal. EIA-364-28F Page 10 4.1.8.3.1 Example of alternative procedure As an example of the co
43、mputation of rates of change, assume that the frequency spectrum has been divided into three bands, 55 Hz to 125 Hz, 125 Hz to 500 Hz and 500 Hz to 2,000 Hz, in accordance with 4.1.8.1. For each band, let the constant, , represent the frequency change (in Hz/minute), divided by the maximum frequency
44、 (in Hz). Then the rates of change for the three bands will be 125, 500 and 2,000, respectively. The times (in minutes) to traverse the three frequency bands are 125 55125 500 125500 2 000 5002 000 , , ,and Since the minimum total sweep time is 30 minutes, 70125 375500 1 5002 000 30 + + =, whence =
45、0.0687/minute. The required maximum constant rates of frequency change for the three bands are therefore 8.55 Hz per minute, 34.2 Hz per minute and 137 Hz per minute, respectively. The minimum times of traverse of the bands are 8.2 min, 10.9 min and 10.9 min, respectively. 4.2 Test conditions V, VI
46、and VII 4.2.1 Control and analysis of random vibration 4.2.1.1 Spectral density curves The output of the vibration machine shall be presented graphically as power-spectral density versus frequency; see 4.2.1.1.1. The spectral-density values shall be within +40% and -30% (1.5 dB) of the specified val
47、ues between a lower-specified frequency and 1,000 Hz, and within +100% and -50% (3 dB) of the specified values between 1,000 and an upper-specified frequency (2,000 Hz). A filter bandwidth will be a maximum of 1/3-octave or a frequency of 25 Hz, whichever is greater. EIA-364-28F Page 11 4.2.1.1.1 Po
48、wer-spectral density Power-spectral density is the mean-square value of an oscillation passed by a narrow-band filter per unit-filter bandwidth. For this application it is expressed as g2 / f, where g2 / f is the mean-square value of acceleration expressed in gravitational units per number of cycles
49、 of filter bandwidth. The spectral density curves are usually plotted either on a logarithmic scale, or in units of decibels (dB). The number of decibels is defined by the equation: The rms value of acceleration within a frequency band between f 1 and f 2 is: g = f dfrms 2ff12g/1 2where gr2 / f is a given reference value of power-spectral density, usually the maximum specified value. 4.2.1.2 Distribution curves A probability density-distribution curve may be obtained and compared with a gaussian-distribution curve. The experimentally-obtained curve sha
