Morr While doing so the following are to be considered: The equipment altitude see 3. Perform the required drops using the apparatus of para 3. This requirement is aimed to simulate in a known and repeatable manner, kss effects produced by static electricity discharging into electronics sub-systems from human beings and inanimate objects. For items under 45 kg poundsthe 26 drop requirement may be divided among upto 5 times dropping of the same item if desired, in any combination. The total duration of the simulation shall be 1.
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Accuracy — The accuracy of measuring system shall be such that it determines the true value with the given tolerance. This wire shall be used to scarp gently the surface of the culture to liberate the spores. The heat input and surface temperature ar eto be calculated as a function of time of mss prescribed variation of h and T taking into account the thermal properties of the missile frame. Spray from the shower headsshall be directed as: For this purposethe volume of the test chamber should preferably be not less than eight times the jsss of the equipment under test.
Step 6 — Operate the test item in accordance with the approved test plan. The applicable test jas or test procedures see clause 3.
The alkaline spray chamber or humidity chamber shall be used for storage of the equipment under test for exposure to the conditions specified in clause 3. A linear sweeping approximation may be used, provided the actual sweep rate does not exceed one octave per minute at any time and the duration of passage through each octave above 60 HZ is approximately kss same as with the logarithmic sweep.
Owing to a large number of generations in the genetic history of the standard culturesit is possible for them tosuffervariation in their ability to attack certain materials. Drops of liquid condense accumulating on the walls, ceiling and other parts of the chamber shall not fall jsw the equipment under test.
When with measuring system as described in 2. Out of the equipment are vulnerable to ESD effects and hence should be subjected to test. Where equipments are deployed in tracked and wheeled vehicles, the levels appropriate tracked vehicles shall apply. While conducting the functional checks, the required number of ESD pulses are generated and deviations if any in the functional parameters have to be recorded.
In the absence of suitable test track as per nss. From para 2 determine the height of the drops to be performed, the number of drops per test item, and the drop surface. Recovery — The equipment shall be allowed to remain under the standard recovery conditions for a period of 2 hours.
Date Amendment pertains to: Conditioning — The equipment shall be subjected to this test, in its unpacked and switchedoff or switched-on condition as specified. The equipment must be functional during the first third and the last third duration of the test. The heaters are controlled so as to supply the system with the calculated heat input as a function of time. The maximum permissible sweep rate is given by: The duration and amplitude for each fixed frequency see clause 3. QT Qualification tests carried out to verify that equipment is capable of operating to specified performance throughout range of environments of its service application and to provide a reasonable assurance that life requirements will be met.
The height of drop shall be measured from the points of the equipment, nearest to the steel plate when suspended prior to dropping. TEST A drop test platform meeting the requirements of clause 2. The equipment under testwhile being under the laboratory atmospheric conditions shall be suitably positioned inside the chamber in its normal operational altitude as specified. The floor or barrier receiving the impact shall be of two inch plywood backed by concrete.
Random motion severity see 3. Position the item as it would be for servicing. Visible frosting should occur on the surface of the equipment when the mean temperature of the equipment has attained a level between 0C and 50C and the frost has melted, air pressure in the chamber shall be restored to the laboratory conditions at approximately uniform rate during a period of 15 30 minutes. Details of operation and performance check, if applicable see clause 3.
Jjss value of q shall be the maximum value attainable during free flight s. Preparation of acid solution. A dry heat chamber conforming to the requirements of the high temperature test.
Its ability to function satisfactorily, immediately after removal of the acceleration, shall be tested, if specified. Number of times the vehicle shall be driven on test track see clause 4. Radial Wash Board — This has corrugations at varying angles to the track and produce twisting effect. In the event that all free flight functional checks are made during captive functional tests levels are lager than or equal to those desiredno free flight functional test required.
For items under 45 kg poundsthe 26 drop requirement may be divided among upto 5 times dropping of the same item if desired, in any combination. The dust shall conform to the following requirements.
In some cases for examplefor large equipmentit may be difficult to maintain a limit of 25 percent. Related Posts.
JSS 0256 01 PDF
Accuracy — The accuracy of measuring system shall be such that it determines the true value with the given tolerance. This wire shall be used to scarp gently the surface of the culture to liberate the spores. The heat input and surface temperature ar eto be calculated as a function of time of mss prescribed variation of h and T taking into account the thermal properties of the missile frame. Spray from the shower headsshall be directed as: For this purposethe volume of the test chamber should preferably be not less than eight times the jsss of the equipment under test. Step 6 — Operate the test item in accordance with the approved test plan.
Malanos The total number of cycles shall correspond to one of the following test conditions, as required. If required the equipment shall be switched on and operated for a specified duration at any ime during this period of exposure. At the completion of the test periodthe equipment shall be subjected to recovery conditions and kss measurement shall be made as specified. When humidity conditions in the chamber are obtained by using dematerialized water, this shall have a resistively of not less than ohm metres.