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# EMC tests of non-rad-tol DI/OT system
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## Levels of EMC environment as per standard 61000-4-4:
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Levels of EMC environment as per standard 61000-4-4:
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* **level 1**: well protected environment (e.g. computer room)
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* **level 2**: protected environment (e.g. control room of instustrial plants)
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* **level 3**: (5kHz, 100kHz, 2kV to power lines, 1kV to signal ports): industrial environment, no surpression of bursts, poor separation of industrial circuits, poor separation of power and signal cables
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* **level 4**: (4kV to powerlines, 2kV to signal lines): heavy industrial, power plants, rely rooms
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*Possible test results*
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Possible test results:
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* **A** - good performance
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* **B** - some interuption that disapears after stopping test - automatic recovery
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* **C** - temp loss of function but requires intervention (need to reset)
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