Radiated Immunity Testing as per IEC 60601-1-2

D

DileepJoshi

#1
Hello,
I need a clarification on using a patient simulator during Radiated Immunity testing.
I am planning to use either Fluke or Netech ECG simulator during immunity testing of our ECG device. can anyone pls tell what are the implication for using it? i am not clear on this aspect which is mentioned in clause 6.2.1.5 and 6.2.1.7 of 60601-1-2 3rd edn.

Thanks much...
 
Elsmar Forum Sponsor
#2
The condition of the patient being 'floating' (ie NOT connected to earth) and the condition where the patient IS Earthed are both considered to be NORMAL condition (ie no fault present).

But, from an EMC perspective, the patient floating is considered to be the 'worst case' so this is how the test should be done. So your simulator needs to have fully floating outputs.

The rationale for these sub-clauses in Annex A helps to clarify the situation.

Also, be sure to check the Particular standard (60601-2-27 or 60601-2-49). Each gives clear details of how to conduct these tests and also the limits of allowable performance degradation during the immunity tests.

Even if your device does not fall within the scope of those 2 Particular Standards they are invaluable for the conduct of these tests.

EDIT
Just checked an old (out of date) -2-27 standard and there are clear diagrams shown, for the setups for both the immunity and the emissions tests.
 
Last edited:
T

thesmyle

#3
Sometimes I find it difficult to judge if a simulator will be susceptible to the test causing false readings. I've used some measurement tools outside the chamber and one can say the long cables can be a problem.

I would be interested to know how you incorporate the patient simulator into the test.

-mark
 
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