TE-CD-TSP 22 Operations Manual
The following is a step by step process of the calibration of a TE-CD-TSP Volumetric Flow Controlled
TSP Particulate Sampling System. Following these steps are example calculations determining the
calibration flow rates for the sampler. The air flow through these types of sampling systems is controlled
by a Volumetric Flow Controller (VFC) or dimensional venturi device.
This calibration differs from that of a mass flow-controlled TSP sampler in that a slope and intercept
does not have to be calculated to determine air flows. Also, the calibrator orifice Qactual slope and
intercept from the orifice certification worksheet can be used here, unlike a mass flow-controlled TSP
where Qstandard slope and intercept are used. 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
The attached example calibration worksheet uses a TE-5028A Variable Orifice Calibrator which uses an
adjustable or variable orifice, which we recommend when calibrating a VFC.
Proceed with the following steps to begin the calibration:
Step 1: 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 2: Turn on the sampler and allow it to warm up to its normal operating temperature.
Step 3: 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.
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. Also, never try this leak test procedure with a manometer
connected to the pressure tap on the calibration orifice or the pressure tap on the side of the sampler.
Liquid from either manometer could be drawn into the system and cause motor damage.