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Original Articles

Nomograph for Field Checking Meter Calibrations on EPA-Type Stack Sampling Trains

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Abstract

In a typical "EPA train" for stack sampling, there are two meters, the dry gas meter and the orifice meter, which require periodic calibration. The controversy which presently exists over the required frequency of calibration is the result of using meters which rarely need calibration, but which have the potential of changing calibration at any time.

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