The following is a step-by-step process of the calibration of a TE-6070-BL, TE-6070D-BL Brush-
less 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 utilizes resistance plates to simulate airflow or a TE-
5028 Variable Orifice Calibrator that 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:
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 adaptor. Hold down nuts securely for
this procedure to ensure that no air leaks are present.
Step two: Disconnect brush-less motor for the brush-less mass flow controller (Squeeze 5 wire plug
together and pull apart).
Step three: Connect the “Brushless MFC Calibration By-pass Adapter” to the brush-less motor.
Step four: Connect a fresh 9-volt battery to the battery clip of the Adapter. When you plug mail cord
on Adapter into the source voltage, the brush-less motor will now operate at full speed during the
calibration procedure until Adapter is disconnected or the 9-volt battery is disconnected.
Step five: Plug Adapter into the source voltage.
Step six: Allow the sampler motor to warm up to its normal operating temperature.
Step seven: 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
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