Monitoring of Operational Tests
Monitoring of operational tests and the recording of all critical performance parameters has become a requirement in MIL-STD-810H.
Operational testing has been a part of MIL-STD-810 since Revision C in 1975. It refers to testing the item in a manner that represents service use as documented in the mission profile. Successive revisions have placed more stringent requirements on this mode of testing. Monitoring of operational tests is one such requirement.
Requirements as specified in Revision G change 1 Part 1, paragraph 5.10 reads as follows:
“Performance check. Monitoring and recording of test item’s critical performance parameters is required before and after all tests. Monitoring of performance parameters is not required during non-operational tests such as storage and transportation. Monitoring of performance parameters during operational tests is strongly suggested. Where cost concerns preclude monitoring during an operational test, consideration should be given to the consequences of undetected, intermittent failures.”
Revision H has changed the wording of the last two sentences of that paragraph to:
” Monitoring and recording of the critical performance parameters during operational tests is required. If unable to monitor during operational tests, obtain test sponsor approval prior to the start of testing and document rationale in the test report.”
Development of Monitoring and Simulation Equipment
Environmental testing has the capability of inducing intermittent failures in equipment. Detection of these failures is critical in Developmental Testing and Evaluation to ensure a product’s capabilities during field testing and deployment. These increased requirements call for a more diligent approach to the design and planning of monitoring equipment used in operational testing. Designing, building, and programming the required (off chamber) equipment will require time and resources. Monitoring equipment should detect record and capture intermittent failure conditions. It should then notify test personnel of failures. It should record all critical functions and exercise the UUT to simulate in service operation. Additionally, it should be able to aid in the performance of functional and operational tests.
Such monitoring equipment is also useful in EMI/EMC testing for detecting susceptibility issues. It can also exercise the equipment under test to provide representative operation necessary for adequate evaluation of equipment emissions.
In essence, a “green light” on the UUT is no longer a suitable solution, if indeed it ever was. Properly designed equipment is required monitoring operational tests during tests. It is impossible for a human to monitor a test of long duration or perceive short intermittent failures.
Our experts at CVG Strategy have extensive experience in Environmental and EMI/EMC testing and evaluation. We have expertise in a number of industries and products, both military and commercial. CVG Strategy specializes in Independent Developmental Testing and Evaluation including: Development of Life Cycle Environmental Profiles, Test Plans, Test Witnessing and Troubleshooting.
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