This document describes the method of adjusting the gauge using an offset, including wet density offset, moisture offset, and trench offset. Users can use the offset to correct the measurement results of the gauge.
The document is a user guide for the Troxler Model 3450 Surface Moisture-Density Gauge. It details how to operate the device for testing soil, concrete, and asphalt sites. Key functions explained include setting up target values, performing standard counts for calibration, and adjusting offsets for wet density, moisture, and trench measurements.
The operator should wear a dosimeter or radiation badge, and safety glasses must be worn during site preparation procedures.
A standard count should be taken daily to check gauge operation and allow for compensation of natural source decay.
Troxler recommends averaging four one-minute readings taken around a point.