Pressure DetectorsPRESSURE DETECTOR FUNCTIONAL USESAmbient temperature variations will affect the accuracy and reliability of pressure detectioninstrumentation. Variations in ambient temperature can directly affect the resistance ofcomponents in the instrumentation circuitry, and, therefore, affect the calibration ofelectric/electronic equipment. The effects of temperature variations are reduced by the designof the circuitry and by maintaining the pressure detection instrumentation in the properenvironment.The presence of humidity will also affect most electrical equipment, especially electronicequipment. High humidity causes moisture to collect on the equipment. This moisture can causeshort circuits, grounds, and corrosion, which, in turn, may damage components. The effects dueto humidity are controlled by maintaining the equipment in the proper environment.SummaryThe three functions of pressure monitoring instrumentation and alternate methods of monitoringpressure are summarized below.Functional Uses SummaryPressure detectors perform the following basic functions:- Indication- Alarm- ControlIf a pressure detector becomes inoperative:- A spare detector element may be used (if installed).- A local mechanical pressure gauge can be used (if available).- A precision pressure gauge may be installed in the system.Environmental concerns:- Atmospheric pressure- Ambient temperature- HumidityRev. 0 Page 5 IC-02
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