The following is a step by step process of the calibration of a TE-6070V, TE-6070DV, TE-6070V-
BL, TE-6070DV-BL Volumetric Flow Controlled PM10 Particulate Sampling System.
Following these steps are example calculations determining the calibration flow rates for the sampler.
The flow rate of the sampling system is controlled by a Volumetric Flow Controller (VFC) or
dimensional venturi device. This calibration differs from that of a mass flow controlled PM10 sampler in
that a slope and intercept does not have to be calculated to determine air flows. The flows are
converted from actual to standard conditions when the particulate concentrations are calculated. With a
Volumetric Flow Controlled (VFC) sampler, the calibration flow rates are provided in a Flow Look Up
Table that accompanies each sampler. The attached example calibration worksheet uses a TE-5028A
Variable Orifice Calibrator that uses an adjustable or variable orifice, which we recommend when
calibrating a VFC.
Proceed with the following steps to begin the calibration.
Step one: Mount the calibrator orifice and top loading adapter plate to the sampler. A sampling filter is
generally not used during this procedure. Tighten the top loading adapter hold down nuts securely for
this procedure to assure that no air leaks are present.
Step two: Turn on the sampler and allow it to warm up to its normal operating temperature.
Step three: Conduct a leak test by covering the holes on top of the orifice and pressure tap on the
orifice with your hands. Listen for a high-pitched squealing sound made by escaping air. If this sound is
heard, a leak is present and the top loading adapter hold-down nuts need to be re-tightened.
“WARNING” Avoid running the sampler for longer than 30 seconds at a time with the orifice
blocked. This will reduce the chance of the motor overheating.
“WARNING” never try this leak test procedure with a manometer connected to the side tap
on the calibration orifice or the blower motor. Liquid from the manometer could be drawn into
the system and cause motor damage.
Step four: Connect one side of a water manometer or other type of flow measurement device to the
pressure tap on the side of the orifice with a rubber vacuum tube. Leave the opposite side of the
manometer open to the atmosphere
Step five: Connect a water manometer to the quick disconnect located on the side of the aluminum
outdoor shelter (this quick disconnect is connected to the pressure tap on the side of the filter holder). If
using the TE-5025A (a fixed orifice that uses load plates) orifice a longer manometer >30” is used here
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