The reference junction is suitably configured for {TAIL ~ connection} to {HEAD ~ the reference} sourcing or sensing unit 
The reference junction is suitably configured for { TAIL ~ connection } to { HEAD ~ the reference } sourcing or sensing unit
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH