manometer one side of the 'U' tube goes up the other goes down; add together this is the "H2O
Step six: Turn black knob on top of calibrator (TE-5028A) counter clock-wise opening the four holes
on the bottom wide open. Record the manometer reading from the orifice and the continuous flow
recorder reading from the sampler. A manometer must be held vertically to insure accurate readings.
Tapping the backside of the continuous flow recorder will help to center the pen and give accurate
readings. Repeat this procedure by adjusting the knob on the orifice to five different reading. Normally
the orifice reading should be between 3.0” and 4.0” of H2O. If you are using a fixed orifice (TE-
5025A), five flow rates are achieved in this step by changing 5 different plates (18,13,10,7, and 5 hole
plates) and taking five different readings.
Step seven: Record the ambient air temperature, the ambient barometric pressure, the sampler serial
number, the orifice s/n, the orifice slope and intercept with date last certified, today’s date, site location
and the operator’s initials.
Step eight: 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 PM10 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 PM10 sampler, the slope and intercept for this orifice uses actual flows rather than standard flows
and is taken from the Qactual section of the Orifice Calibration Worksheet. The Qstandard flows are
used when calibrating a TSP sampler.
The five orifice manometer readings taken during the calibration have been recorded in the column on
the data worksheet titled "H2O. The five continuous flow recorder readings taken during the calibration
have been recorded under the column titled I (chart).
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