This document is the operation guide of Dynatron 3211A IEPE accelerometer, which is a low-noise general-purpose accelerometer with ceramic shear mode crystals and proven IEPE (built-in electronics) technology. This guide includes 1) Specifications, Model 3211A 2) Outline/Installation drawing 127-3211A. 3) Paper, “Low Impedance Voltage Mode (IEPE) Theory and Operation”