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Teledyne API Ultrafine Particle Monitor - Model 651 APPENDIX A Firmware Commands
07506C DCN6727 A-17
D Record
D records contain the following information:
D
Record identifier
Date
Date in yyyy/mm/dd format
Time
Time in hh:mm:ss format
Flags
Status Flags (see information in RIE command description)
Conc
Aggregated concentration calculated by dividing the
accumulated aggregate counts by the live-time of the
sample flow rate (2 cm
3
/sec). The aggregated counts and
live-times are accumulated each 1/10
th
second interval.
The overflow flag is set when the concentration value
exceeds the maximum specified concentration.
AT
Elapsed sample time 0.1 sec resolution (0.1 to 3600)
LT
Live time 0.001 sec resolution (0.001 to 3600)
CNT
Accumulated particle counts
Photo
Average photo-detector value in mV
Reserved
Blank reserved space
PH
Average pulse height in mV
PSTD
Pulse height standard deviation
Example D Record:
D,2012/11/2,08:01:21,0,1.04e4,6.0,4.4,769424,140,,0,0
Record Type Date Time Flags Conc AT LT CNT Photo PH PSTD
D 2012/11/2 08:01:21 0 1.04e4 6.0 4.4 769424 140 0 0