Thermo Scientific Partisol 2000i Instruction Manual page 37

Thermo Fisher Scientific
(m³) in both volumetric and standard terms in accordance with U.S. EPA
guidelines. The sampling system determines the ambient temperature and
pressure for flow rate calculations through the use of sensors that continually
provide updated information to the microprocessor system.
The mass flow sensor in the Partisol 2000i is calibrated at a temperature of 0
°C and pressure of 1 Atmosphere (1013.2 millibars or 760 mmHg). The
instrument uses the measured ambient temperature and pressure to sample at
the correct volumetric flow rate. Using this information, the microprocessor
calculates the correct mass flow set point (Flow Rate
the desired volumetric flow setting:

Flow Rate Flow
STP
where:
Flow Rate = Control set point of the mass flow meter (equivalent flow at 0 °C and 1
STP
Atmosphere).
Flow Rate = Volumetric flow rate set point (L/min) as entered by the user in the
Vol
Setup screen. This value is 16.7 L/min (1 m
Current Temp = The current temperature (°C) as measured by the temperature sensor
mounted on the down tube of the Sampler.
Current Pres = The current pressure (mmHg) as measured by the pressure transducer in
the Sampler's enclosure.
The Partisol 2000i automatically determines the sampled volume in
volumetric and standard m³ for each filter exposed, and stores this
information internally for later viewing or downloading.
For PM and PM
2.5 coarse
U.S. EPA must be in volumetric m³, which simply involves the integration of
the above volumetric flow rate over the sampling period, without any further
adjustment. For PM
10
US EPA must be adjusted to standard conditions. Since the sampler provides
the collected volume data automatically, no additional calculations are
required after the completion of sampling to determine either standard or
volumetric values.
273.15
Rate x

Vol
Curr Temp
sampling, the mass concentration data reported to the
sampling, the mass concentration data reported to the
Partisol 2000i and Partisol 2000i-D Instruction Manual
Introduction
Partisol 2000i Configuration
) required to achieve
STP
Curr Pres
x
273.15 760
3
/h) for most applications.
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