B-12
Model 3786 Ultrafine Water-based Condensation Particle Counter
Command:
SM,n,ttt,Vmin,tau,tfp,tbp
Scanning
command
N = mode 5,6
ttt = sample interval in seconds (1 to 600)
Vmin=starting voltage in microvolts
tau= scanning constant in milliseconds (100-1000000)
tfp= front porch dwell time in seconds (0-600)
tbp= back porch dwell time in seconds (0-600)
Response:
OK
Examples:
SM,5,60,10000,8686,3,1
Command to begin a scanning sample
OK
Response
(Sixty Z records reported - see Z record in Data Reporting
Records section in this Appendix)
SM
Command to read back the current setting
5,60,10000,8686,3,1
Response (sent between Z records)
SO
S
et
O
ptics Heater
The set optics heater command switches the optics heater on or off. The heater is
always in the “on” condition when the instrument is first powered up.
Command:
SO,x
Command to set optics tube heater on or off
x = 0 turns heater off, x = 1 turns heater on
Response:
OK
Example:
SO,0
Command turns heater off
OK
Response
SO
Command to read back the current setting
0
Response indicates heater is off
SOS
S
et
O
ptics Temperature
S
et point
This command sets the control temperature set point for the optics section of the
UWCPC. The set point temperature is provided in tenths of a degree Celsius. This
parameter is not stored and will revert to the default values on the next power-up
cycle. The factory default setting of this value is 750 (75.0 degrees C).
Command:
SOS,xxx
Command to set the optics temperature control set point
xxx = 0 to 800
Response:
OK
Response
Example:
SOS,750
Command to set Growth Tube temperature to 75.0 deg.
OK
Response
SOS
Command to read back the current setting
750
Response indicates the set point value