Diaphragm Apparatus

A sturdy base contains all parts of the Diaphragm apparatus. This forms a compactproduct, ideal for use on a workbench. Two heavy flanges clamp the edge of the diaphragm to provide built-in edge conditions. The area directly under the diaphragm contains oil. The Diaphragm apparatus allows students to examine the effectof pressure on the surface profile of a diaphragm. The signals from eachstrain gauge are shown on a digital display. A digital dial gauge is fitted toa digital position indicator. The dial gauge can be traversed across thediaphragm to measure its surface profile. They can also determine thedistribution of circumferential and radial strains across its diameter. Eight strain gauges are cemented to the top surface ofthe diaphragm in various positions and at different radii. Each strain gaugecircuit is a full bridge, with high-stability resistors. Students use a hydraulic pump to increasethe oil pressure under the diaphragm. They record the strain readings and diaphragm profile at different pressures. Both instruments can connect to optionalVersatile Data Acquisition System.