A circuit 3, wherein the alarm circuit includes a light emitting diode which produces {HEAD ~ a visible warning} of {TAIL ~ switch failure} when the alarm switching transistor is turned on 
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A circuit 3 , wherein the alarm circuit includes a light emitting diode which produces { HEAD ~ a visible warning } of { TAIL ~ switch failure } when the alarm switching transistor is turned on
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH