Insulation requirements of BF type infant skin temperature probe

william guo

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#1
Hello experts,
The skin temperature probe of infant incubator was classfied to Type BF applied parts, requirements of 1MOPP based on mains voltage shall be met. Question is where the isolation I can put for this 1MOPP?
1. the insulation of temperature probe. We tested the electric strength btween input conectors pins and probe head with 1500Vrms/1min, no breakdown. but the problem is how to locate the inuslation on the probe, where is it?
2. if we considerred no insulation exists on the probe, can we put isolation on the signal boad by using isolation compoments such as optocoupler, this can complicate the signal processing and circuits design.

Does anyone has experience about this?
 
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