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Teledyne API Ultrafine Particle Monitor - Model 651 APPENDIX A Firmware Commands
07506C DCN6727 A-15
SSTART – Starts a New Sample
SSTART is used to start a new sample routine.
SSTART
Command SSTART,x
X = 0,1,2,3
0 = Stop
1 = Start data type 1 (not used)
2 = Start data type 2 (not used)
3 = Start new sample
Response OK Response issued after parameters changed.
Example
Command SSTART,0 Stops sample.
Response OK
Command SSTART,3 Starts new sample.
Response OK
Command SSTART
Response 3
Parameter not changed – current setting
displayed on record.
U records are displayed when the SSTART,3
command is entered. The records are returned
once per second (see below).
U Record type
X Elapsed time in seconds (integer)
C Concentration in 1/10
th
second intervals (float)
R Raw counts in 1/10
th
second intervals (integer)
X
No value represented between commas for the
Model 651
T Live time in 1/10
th
seconds (float)
D DTC value (float)
P Absolute pressure in millibars (integer)
AN Analog input
HM Pulse height mean in millivolts (integer)
HS Pulse standard deviation in millivolts (integer)
IS
Instrument status (use RIE command to see a
list of statuses)
Example U record:
UX,C,C,C,C,C,C,C,C,C,C,R,R,R,R,R,R,R,R,R,R,,T,T,T,T,T,T,T,T,T,T,D
,P,AN,HM,HS,IS
U1,2.13e3,1.97e3,2.18e3,2.24e3,2.34e3,2.29e3,2.26e3,2.31e3,
2.35e3,2.17e3,466,430,475,489,510,500,493,505,512,474,,,,,,,,
,,,0.099,0.099,0.099,0.099,0.099,0.099,0.099,0.099,0.099,0.09
9,1.17,990,0.000,1179,421,0
U2…