C-20 Model 3321 Aerodynamic Particle Sizer
Spectrometer
RV—Read Firmware Version
Reads the current version level of the Model 3321 firmware.
Example Response
RV Model 3321 APS Firmware Version 1.12 13-Dec-
2001
Unpolled C om mands
Using unpolled commands instructs the Model 3321 to automatically output
data records at specific intervals. In unpolled mode, 0 disables a record
and 1 enables the record. During unpolled operation, records that have
been enabled are sent at the end of each averaging time. All U parameters
are retained in EEPROM. Not all records available in all modes (e.g. UAx
command is not available in correlated mode and may return ERROR).
U—Begin Unpolled Operation
Enables and disables unpolled operation.
Ux
where:
x is 0 or 1.
U1 enables unpolled operation and clears continuous running average
buffers. U0 disables unpolled operation.
U+ —Enable All Records
Enables all unpolled records. See Data Records in the "Unpolled Record
Formats" section of this chapter.
U- —Disable All Records
Disables all unpolled records.
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