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TE-PNY1123 18
Operations
Calibration Procedure
The following is a step by step process of the calibration of a TE-PNY1123
Mass Flow Controlled PUF High Volume Sampling System. Following these
steps are example calculations determining the calibration flow rates, and
resulting slope and intercept for the sampler. These instructions pertain to the
samplers which have air flow controlled by electronic mass flow controllers
(MFC) in conjunction with a manometer.
The Total Suspended Particulate samplers (TSP) are many times referred to as
lead samplers as this is the primary duty given to these instruments in most
cases. These instruments are suitable for capturing larger particulates such as
heavy metals. Air monitoring studies that are concerned with smaller
respirable particulate generally will call for the use of PM-10 particulate
samplers which have a different calibration procedure. The TSP samplers have
a very wide range of acceptable air flow operating limits, i.e., 1.10 to 1.70
m3/min (39 to 60 CFM). A mass flow controller will sense a decrease in air flow
and increases the voltage to the blower which increases the blower speed in
order to compensate. This is necessary when sampling with a PM-10 sampler
due to the narrow acceptable air flow range of these types of instruments.
One example calibration sheet is attached to this manual. To download the
electronic spreadsheet, please visit www.tisch-env.com. It is highly
recommended to download the electronic spreadsheet and use Excel
features to complete calculations. To find the electronic spreadsheets, go
to the homepage, scroll down and look under Support on the right side of
the page. Under Quick Links to Sampler Calibration Sheets, select the
spreadsheet for the corresponding Air Sampler to start an immediate
download.
Proceed with the following steps to begin the calibration:
1. Disconnect the sampler motor from the mass flow controller. When
calibrating the mass flow controller is not used. Plug motor into timed
female on timer.
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