{HEAD ~ A part} of {TAIL ~ the signal processing circuit} connected to the probe is isolated by an isolation circuit to secure the safety 
of
{ HEAD ~ A part } of { TAIL ~ the signal processing circuit } connected to the probe is isolated by an isolation circuit to secure the safety
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH