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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The preferable method is to measure the current level of heat input and use a fervor mechanism to minimize the difference between the calculated and the measured values of q by suitable variation of heater supply voltage.
If the equipment is long compared to its width and a single noise source is used, the equipment shall not be mounted with the long axis in line with the noise source.
Care should be taken to distribute the ESD pulses uniformly all along the time during which the functional tests are carried out. Simulation of Precalculated surface temperature.
JSS – Antifungal Test – Electronics | Situ Biosciences LLC
Based on this the level for each environmental test is to be specified. During the visual examination of the equipment, defects in construction, the presence of foreign bodies, moisture, dust ,etc. Conventional classification based on rangerole etc. The corresponding acceleration as level determined for the test shall be applied along three mutually perpendicular axis and two opposite directions. The temperature and R.
The resistance of EEDs has to be checked fro change in resistance or pre-mature ignition.
Unless or otherwise specified, the acceleration shall be applied continuously for a period of 60 seconds. Random motion severity see 3.
The iss of the drop shall be chosen from Table 4. Combination of above tests may be resorted to by the designerif required.
The intensity of shock is related to the change in length of the copper as result of the blow. 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.
The required condition for the height of drop. Small items will be tested to higher levels during transit drop. The equipment jjss be visually examined and electrical, mechanical or any other checks shall be carried as specified. IF forced circulation is used in the testing of heat dissipating equipment, the concept of ambient temperature is no longer valid. Step 5 – Document the results.
Operational Mode Condition for operational mode is to be selected from Table 4. The equipment shall be mounted in the chamber as specified in 3. When humidity conditions in the chamber are obtained by using dematerialized water, this shall have a resistively of not less than ohm metres.
The temperature range may be extended beyond these limitsup to jws c to 40 c for large equipment.
When the bump test is employed to ascertain the capability of an equipment to withstand transportation, other than that inherent in its service use the equipment shall be mounted as specified. Any deviation from test procedure. If necessary a suitable respirator should be worn. The low frequency range may need extended below 20 Hz for those equipment which have a low frequency response and for tests where an isolator system is included with the equipment. The composition of the solution shall be 0.
Missile should not be charged with explosives.
JSS 55555 – Antifungal Test – Electronics
The time taken shall not exceed 6 minutes, unless otherwise specified. A platinum or a nichrome wire shall be sterilized by heating it to red hot state in a flame and allowed to cool.
If calculated of is below Hz use Hz. In such cases a concession should be agreed js the responsible authority on the tolerance that are acceptable at these particular frequencies ; the result achieved shall be stated in the test report. This shall be noted for comparison with those found in the final resonance search.
The equipment, as in clause 3. Number of times the vehicle shall be driven on test track see clause 4. Procedure 1 The equipment under testwhile being under the laboratory atmospheric conditions shall be introduced in to salt spray chamberthe later also being under the same conditions. The design and construction of the chamber shall be such that any heat dissipated by the equipment during testing shall not appreciably influence the conditions within the chamber.
Applicability of procedure 2. Environmental Testing of Armament 02256 Packages. The equipment shall be visually examined and shall be subjected to electricalmechanical and other checks as specified.