When the sensed temperature is within a higher range sufficient to result in combustion of the unburned accumulated particulates, {HEAD ~ the pulses} are accumulated as {TAIL ~ a count} in a second counter; the value of the count in the second counter is proportional to the continous length of time that the sensed temperature remains in the higher range 
are accumulated as
When the sensed temperature is within a higher range sufficient to result in combustion of the unburned accumulated particulates , { HEAD ~ the pulses } are accumulated as { TAIL ~ a count } in a second counter ; the value of the count in the second counter is proportional to the continous length of time that the sensed temperature remains in the higher range
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 REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH