STANDARD CLEANING AND CALIBRATION PROCEDUREFOR TGA-50(H) AND TGA-51(H)

Introduction

The following procedure is to be used for the maintenance and calibration of the TGA-50(H) and TGA-51(H). Because the TGA measures the weight loss of materials by thermal separation, some of the evolved material can be deposited onto the active parts of the weighing assembly (e.g. quartz rod, hanging pan, sample cell). This can cause erroneous readings in subsequent analyses by showing excessive or exaggerated weight losses that are not indicative of those particular samples. The following materials and supplies will be needed for cleaning and calibration: 1. A supply of Oxygen (O₂) or air. 2. A supply of 90/10 mixture of N2/H2 (Optional). 3. Certified Curie Point standards (SRM-761) 4. Calibrated mg weight set (P/N 201-52724-01) 5. TGA calibration magnet (P/N 220-96401-00)