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TE-5170V VFC TSP 16 Operations Manual
Operations
Calibration Procedure
The following is a step by step process of the calibration of a TE-5170V
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
sampler.
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
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