ISO-9022-19-1994.pdf
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1、INTERNATIONAL STANDARD ISO 9022-19 First edition 1994-07-15 Optics and Optical instruments - Environmental test methods - Part 19: Temperature cycles combined with sinusoidall or random Vibration Op tique et ins trumen ts d optique - Methodes d essais d environnemen t - Partie 19: Essai Combi 13 d c
2、 U c 2 t- 0 h aJ 2 h, 3 .- E 3 0 5 b 0 rc n x 0 L I m u -7 c 10 B 3 b 3 . C. 3 C . Ambien atmospheric condi t ions Duration, h 1, temperature cycle Figure 1 - Schematic representation of course of first two temperature cycles for conditioning methods 53,54 and 55 with duration of 8 h per cycle 5 -,-
3、,- ISO 9022=19:1994(E) .3 Operating eonditisn sf specimen In the case of electrically-operated specimens, the times at which the power supply is connected or dis- connected and the voltage of the power supply within each temperature cycle shall be specified in the rel- evant specification. The times
4、 at which other functions such as cooling, heating and various loads are switched on or off shall be stipulated in the relevant specification. 5.4 Mechanical conditioning of specimen The mechanical conditioning of the specimen per cy- cle shall be performed in the last hour of the hot or cold Phase,
5、 i.e. Prior to the changeover to the follow- ing limit temperature. If the specimen is operated by power supply, this shall be connected for the duration of the mechanical conditioning. 6 Environmental test code The environmental test code shall be as defined in ISO 90224. EXAMPLE The environmental
6、test of Optical instruments for re- sistance to a combination of temperature cycles with sinusoidal Vibration, conditioning method 53, degree of severity 02, state of Operation 2, shall be identified as: Environmental test ISO 9022-53-02-2 7 Specification a) environmental test csde; b) number of spe
7、cimens; c) number of temperature cycles; axes along which mechanical Vibration is to be applied; specification of the mean heating and cooling rates in range between 2 K and 10 K per minute; specification sf connection/disconnection times for the specimen (power supply, cooling, heating, additional
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- ISO 9022 19 1994
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