 Challenge: Monitor water depth in a remote location in the Rocky Mountains where periodic vent filter maintenance is not practical.
Details: Transducer will be used to monitor the depth of a lake high in the Rocky Mountains. Due to the remote location, the customer desires to use a sealed-gage transducer to alleviate the need for a vent filter and the periodic maintenance it requires.
Solution: A Series 700 constructed in a sealed-gage configuration with the zero output compensated for local barometric pressure. Since sealed-gage transducers are normally calibrated with the zero output compensated for 1 nominal atmosphere at sea level, there would be considerable error induced when used at the higher elevation if the transducer was constructed without taking into consideration the difference in atmospheric pressure at sea level and the atmospheric pressure at the higher elevation. In order to eliminate error due to the difference between atmospheric pressure at sea level and atmospheric pressure at the altitude where the transducer will be installed, the customer is asked to identify the elevation of the lake where the transducer will be used. Using the supplied elevation information, the nominal atmospheric pressure at the installation location is calculated and the zero output set for that pressure.
|
