Quality managers and others responsible for maintaining the integrity of data loggers or temperature and humidity chart recorders can now download a comprehensive guide that covers all aspects of instrument calibration. Topics include: Why calibrations are required, review of calibration methods, a step-by-step guide to developing calibration schedules, and best-fit applications for 1-point, 3-point and custom point calibrations. Also included is a glossary of calibration terms. The Dickson Co., 930 S. Westwood Ave. Addison, IL 6010, dicksondata.com