What is the absolute biggest mistake teams make during IEC 60601-1 compliance testing preparation?

• The Topic: IEC 60601-1 mistakes during compliance testing preparation

• The Question: I sat down to discuss this with one of our Sr. Electrical Engineer Contractors -

  "What is the absolute biggest mistake teams make during IEC 60601-1 compliance testing preparation?"

• The Response:

  “The biggest mistake I see is:

  • Treating safety testing as a before-and-after exercise.

    Teams instruct the test house to verify performance of a system before and after a stress event—whether that’s an EMC perturbation, a single-fault condition, or a hi-pot application—and consider the test passed if the system maintains basic safety and essential performance post-event.

  • However, IEC 60601-1 compliance also considers the system's behavior during the stress event.

    If basic safety or essential performance is compromised in the transition, even briefly, that’s a hazard, regardless of whether the device recovers.

  • A device can pass a post-event performance check and still have e.g. delivered an unsafe output or exceeded a leakage limit during the stress event. 

    For example, an infusion pump that briefly over-delivers during an external electromagnetic perturbation but returns to nominal output afterward should not be considered IEC 60601-1-compliant.”

• Solution Strategies:

  “The fix can be to add sufficient definition in the test plan:

  • what signals to monitor continuously during each stress event, and,

  • what the acceptance criteria are during the transition.

  This means instrumented monitoring in real time, not just a snapshot before and after.”

  Do you have IEC 60601-1 Testing coming up?

  Having issues with your testing now?

  Need some assistance?

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