a. TS: Timestamp in the format: YYYY-MM-DD HH:MM:SS
b. BC_Iref: Black carbon (IR) reference intensity from the aerosol
absorption photometer. Value is expressed in terms of the ADC’s
(analog to digital converter) raw count. Full scale value is
8388607.
c. BC_Isig: Black carbon (IR) Signal intensity from the aerosol
absorption photometer. Value is expressed in terms of the ADC’s
raw count. Full scale value is 8388607.
d. BC_ATN: Black carbon (IR) optical attenuation (unitless)
e. BC: Black carbon in µg/m
3
f. RH: Relative humidity in %.
g. T: Temperature in ºC.
h. FR: Sample flow rate in ccm.
i. Vbat: Battery voltage in volts.
If the unit has gas sensors onboard, the following columns will be
appended to those above:
a. GAS e.g. ‘CO’: Gas concentration in ppm
b. GAS_Vref e.g. ‘CO_Vref’: Reference output from electrochemical
cell in volts.
c. GAS_Vsig e.g. ‘CO_Vsig: Signal output from electrochemical cell
in volts.
If the unit is equipped with GPS, the following columns will be
appended to those above:
a. Lat: Latitude coordinate captured by the GPS unit.
b. Long: Longitude coordinate captured by the GPS unit.
If the unit is connected to an outdoor enclosure, the following columns
will be appended to those above:
a. T_EXT: Ambient temperature in ºC.
b. RH_EXT: Ambient relative humidity in %.
If the unit is connected to an outdoor enclosure equipped with PM, the
following columns will be appended to those above:
a. PM1: PM
1
concentration in µg/m
3
b. PM2.5: PM
2.5
concentration in µg/m
3
c. PM4: PM
4
concentration in µg/m
3
d. PM10: PM
10
concentration in µg/m
3
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