CALIBRATION PROCEDURE-Mass Flow Controlled TE-6070,
The following is a step-by-step process for the calibration of TE-6070, TE-6070D Mass Flow
Controlled PM10 High Volume Sampling Systems. 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 that have flow controlled by electronic mass flow controllers (MFC)
in conjunction with a continuous flow recorder. This calibration differs from that of a volumetric flow
controlled sampler. The attached example calibration worksheets can be used with either a TE-5025
Fixed Orifice Calibrator that utilize resistance plates to simulate a variation in airflow or a TE-5028
Variable Orifice Calibrator which uses an adjustable or variable orifice. The attached worksheet uses
a variable orifice. Either type of orifice is acceptable for calibrating high volume samplers the calibration
process remains the same. Proceed with the following steps to begin the calibration:
Proceed with the following steps to begin the calibration:
Step one: Disconnect the sampler motor from the mass flow controller and connect the motor to a
stable AC power source.
Step two: 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 three: Allow the sampler motor to warm up to its normal operating temperature.
Step four: Conduct a leak test by covering the hole 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 five: Connect one side of a water manometer 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.
Note: Both valves on the manometer have to be open for the liquid to flow freely also to read a