F-6
Model 3090/3090AK Engine Exhaust Particle Sizer
TM
Spectrometer
Zero Electrometer
Command
Response
Description
EELM K0 ZERO
EELM E
Initiate zeroing of electrometer.
Instrument will respond with “BS”
(busy) for 45 seconds. After
completion, the new offset and
covariance values are written to
the DSP.
Note
: The command is only
executed if the instrument has
finished the warm-up count.
EELM K0 STOP
EELM E
Stop zeroing of electrometer.
Read Commands
Read Particle Size Histograms
Command
Response
Description
APH1 K0
APH1 E B1 B2 B3…B16
Normalized Particle Size
Histogram (dN/dlogDp)
Particle concentration for lower 16
particle size bins averaged over
one second per size bin.
BX =
Particle concentration
of size bin X
Range:
0 to 9.9999E9 [#/cm
3
]
Format:
Float
Example: B1 = 1.2345E5
APH2 K0
APH2 E B17 B
18 B19…B32
Normalized Particle Size
Histogram (dN/dlogDp)
Particle concentration for upper 16
particle size bins averaged over
one second per size bin.
BX =
Particle concentration
of size bin X
Range:
0 to 9.9999E9 [#/cm
3
]
Format:
Float
Example: B32 = 1.2345E5
APH3 K0
APH3 E B1 B2 B3…B16
Non-Normalized Particle Size
Histogram (dN)
Particle concentration for lower 16
particle size bins averaged over
one second per size bin.
BX =
Particle concentration
of size bin X
Range:
0 to 9.9999E9 [#/cm
3
]
Format:
Float
Example: B1 = 1.2345E5
