When the temperature reaches a higher cleaning range that is sufficient to burn the accumulated particulates, the elapsed time that {HEAD ~ the temperature} remains within {TAIL ~ such range} is stored in a second counter 
remains within
When the temperature reaches a higher cleaning range that is sufficient to burn the accumulated particulates , the elapsed time that { HEAD ~ the temperature } remains within { TAIL ~ such range } is stored in a second counter
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH