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TE-5170D-BL TSP MFC 18 Operations Manual
last certified, todays date, site location and the operators initials on the
attached blank calibration sheet.
8. Disconnect the sampler motor from its power source and remove the orifice
and top loading adapter plate. Re-connect the sampler motor to the electronic
mass flow controller.
An example of a Lead (or TSP) Sampler Calibration Data Sheet has been attached with data
filled in from a typical calibration. This includes the transfer standard orifice calibration
relationship which was taken from the Orifice Calibration Worksheet that accompanies the
calibrator orifice. Since this calibration is for a TSP sampler, the slope and intercept for this
orifice uses standard flows rather than actual flows and is taken from the Qstandard section of
the Orifice Calibration Worksheet. The Qactual flows are only used when calibrating a PM-10
sampler.
The five orifice manometer readings taken during the calibration have been recorded in the
column on the data worksheet titled Orifice "H2O. The five continuous flow recorder readings
taken during the calibration have been recorded under the column titled I chart.
The orifice manometer readings need to be converted to the standard air flows they represent
using the following equation:
Qstd = 1/m[Sqrt((H20)(Pa/760)(298/Ta))-b]
where:
Qstd = actual flow rate as indicated by the calibrator orifice, m3/min
H2O = orifice manometer reading during calibration, “H2O
Ta = ambient temperature during calibration, K ( K = 273 + °C)
298 = standard temperature, a constant that never changes, K
Pa = ambient barometric pressure during calibration, mm Hg
760 = standard barometric pressure, a constant that never changes, mm Hg
m = Qstandard slope of orifice calibration relationship
b = Qstandard intercept of orifice calibration relationship.
Once these standard flow rates have been determined for each of the five run points, they are
recorded in the column titled Qstd, and are represented in cubic meters per minute.
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