JSS (Revision No. 1) MINISTRY OF DEFENCE JOINT SERVICES SPECIFICATION ON ENVIRONMENTAL TEST METHODS. JSS , knowns as the Penta-Five test, is an antifungal product test for electronics. JSS Revision No. 1. LIST OF MEMBERS ASSOCIATED WITH FORMULATION OF THIS STANDARD. 1. This Joint Services Specification has.
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Care should be taken to ensure that the correct durations are obtained when different frequency range apply to the flight conditions in the most severe category. Inertia actuated service brakes shall be designed to permit braking with not more than one second delay after application of braking force.
Particular attention shall be paid to the physical examination of electrical and electronic equipment for corrosion and deposition of salt. The test item shall be so oriented that upon impact a line from the a line from the struck corner or edge to the center of gravity of the case and contents is perpendicular to the impact surface.
It is important that the level and time of application of the vibration be kept to a minimum. The temperature of chamber shall then be raised to 65 c.
It shall be kept in switched off or switched on conditions as specified. Static accumulation in the flight due to missile engine charging, precipitation and friction and induced charged due to clouds.
The locations where the ESD has to be simulated are identified land number of discharges are identified and number of discharges are decided. For example a short range missile like anti call for high altitude test ,if permitted to be airlifted. It is important to consider absorption characteristic of the specimen, where heating flux is the basis of control.
JSS 55555 – Antifungal Test – Electronics
Based on this the level for each environmental test is to be specified. For spread exceeding 5 dBand rms summation of the individual sound pressure not decibel values shall be used.
The actual test sequence. In each reference planeposition here microphonesdegrees apart, around the equipment. Preparation of acid solution.
The heaters are controlled so as to supply the system with the calculated heat input as a function of time. In the case of an equipment mounted on isolators, the relevant equipment specification shall state whether or not the fundamental resonance frequencies of the equipment on its isolators should be chosen for this endurance conditioning. Equipment intended for use in an environment where bumping takes place for example, in moving vehiclesshall be fastened by its normal means of attachment, unless otherwise specified.
Conditioning The equipment under test shall be subjected to this test in unpacked Condition.
The relative humidity during this period shall not exceed 3 percent. Final Measurements see 3. Equipments used in wheeled vehicle and trailers: Spray from the shower headsshall be directed as: For this simulation, real time flight temperature distribution is 026.
The ASD appropriate to 20 Hz shall be maintained subject to the amplitude limitation uss 2. The laboratory test conditions recorded periodically during the test periods.
The axes along which the equipment is to be vibrated See clause 3.
JSS – Antifungal Test – Electronics | Situ Biosciences LLC
The amplitude and duration shall be as specified. The optimum temperature is likely to be between – 1 c to 10 c depending upon the thermal mass of the item. Restrictions – This test should not be used if it can be demonstrated that the shocks from the transit drop test are of a higher jds. At a radius of 1.
An equipment intended for use with vibration jse should normally be tested with its isolators. Measuring System Monitoring – The acceleration measuring device shall be an accelerometer placed at the monitoring point.
The relevant equipment specification shall specify the applicable pulse shape. Rationale – The heights used during this test were set by examining the typical drops that are commonly made by bench technicians and assembly line personnel.