Flow Calibration at SWIM Lab

by
Westinghouse Savannah River

 
Figure 1. Barometer Attached to Instrumentation Figure 2. Thermal Flow Sensor in Test Nozzle
Westinghouse Savannah River Company (WSRC) has been a long-time user of Paroscientific Pressure Instruments. This selection was made because of the accuracy, high resolution, reliability and long-term stability of Paroscientific Instruments and the demanding nature of WSRC's applications.

The SWIM air flow calibration facility at WSRC provides gas flow calibration for both process (IPI) and secondary calibration (M&TE) equipment to many site users. Equipment such as process flow instruments, variable area meters used in chemical processes, heating and ventilating testers and Industrial Hygiene applications, are calibrated at predetermined intervals to assure flow indications are accurate.

To determine flow with high accuracy, the calibration air stream passes through a flow element producing a proportional pressure. The flow this pressure indicates is then refined using temperature and high accuracy Digiquartz Broadband Barometer readings with a Model 710 Display (New Model 715 Display). These refinements provide the air mass characteristics which allow the standardization of all flow readings. The accuracy of the barometer has to be consistent with that of the other parts of the information chain, as the result is directly proportional to the mass of the flowing media.


Author:   This article was submitted by Westinghouse Savannah River Company