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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After this periodthe chamber temperature will be brought back to 55 c. The sweeping shall be continuous and logarithmic, and the sweep rate shall be approximately one jsd per minute.
JSS_ – Documents
They should not enter the chamber during spraying and the chamber should be purged with clean air to lower the concentration of sulphur dioxide in the air of the chamber to a safe level before it is entered after spraying.
The vibration amplitudes are specified in terms of constant displacement amplitude is associated with corresponding value of velocity or acceleration amplitude, the relationship is as follows: For reasons of safety, care should be taken to prevent the equipment under test being thrown off, if the mounting attachments are broken, but any safety devices used should not introduce additional constraint during the test.
Final measurements – The equipment shall be visually examinedand shall be subjected to electricalmechanical and other checks as specified.
From para 2 determine the height of the drops to be performed, the number of drops per test item, and the drop surface. Simulation of Precalculated surface temperature.
Application Test Method see clause 3. The chamber shall be properly vented to prevent pressure build up inside the chamber.
JSS 55555 – Antifungal Test – Electronics
Mounting Equipment, in its unpacked and switched off condition, shall be fastened to the bump machine, either directly or by means of a fixture. Any enforced reduction of ASD shall be stated in the test report. Note The accumulation dust shall be removed before electrical and mechanical checks are made.
For example, a light equipment item might be jes by one man chest high; thus, it could drop cm. Random vibration as specified in para 4. The maximum mss amplitude at the fixing points of the equipment in any direction normal to the intended including that due to rocking, torsional vibration ,etc.
Recovery the equipment shall be removed from chamber and allowed to cool and any local accumulation of dust shall be noted. Test items of equipment normally provided with vibration isolators first shall be tested with the isolators in place. Deviation from established environmental requirements.
It shall be kept in switched off or switched on conditions as specified. Procedure 2 is applicable for structural test Procedure 1 The equipment js be subjected to the test in its Unpacked and switched-off condition.
The js profile is intended to be used as a starting point for a tailored life cycle recesses analysis and to provide confidence that all potentially significant environmental conditions have been considered. The chamber used for this purpose shall satisfy the requirements specified for damp heat chamber in the tropical Exposure Test Test no 4.
The spray shall be generated by a nozzle large enough not to be blocked by the fragments of mycelium. During this period in the first 3hours the 026 energy level shall be uniformly reduced to zero.
JSS – Antifungal Test – Electronics | Situ Biosciences LLC
Document the impact point or surface for each drop and any obvious damage. The heaters are controlled by a servo mechanism using surface temperature so as to produce calculated surface temperature as a function of time. Two lateral blows from a weight of kg. The sweep will be carried Hz in 15 minutes for each axis: The relevant equipment specification shall indicate in clear terms whether: The DUT is secured firmly to the ground plane.
The generalized profile provides only reprehensive decision making information. Gravel Road – A gravel road is a level or rolling gravel trail. Separate equipment can be jes for this test. Final measurements see 3.
The duration and amplitude for each fixed frequency see clause 3. Any deviation from the proposed procedure. Inertia actuated service brakes shall be designed to permit braking with not more than one second delay after application of braking force.