60601-2-2 Ed 6 Clause 201.8.8.3.102 - HF instrument leakage

Nick_EMC

Starting to get Involved
#1
HI,
I am reviewing Ed 6 of this standard. This clause now asks for the instrument electrode to be included in the test as well as the cable, though the limit has also be raised. An electrosugical instrument's return shaft forms a capacitor with the saline soaked rag and unless the insulation is quite thick the capacitance is quite high, and the current high enough to exceed the spec limit.
I just wondered if anyone had run into this issue?

Also it is difficult to see under what circumstances this current could flow though a patient or user.
Many thanks
Nick
 
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