TMDE UNIT CREST. The U.S. Army Test, Measurement, and Diagnostic Equipment Activity (USATA) has the primary organizational responsibility of performing the test, measurement, and diagnostic equipment (TMDE) calibration and repair support mission (C&RS) for the Army, other DOD claimants, and thousands of industrial based customers. USATA ensures measurements made with TMDE are traceable to national, international, or intrinsic standards of measurement. USATA’s TMDE C&RS mission is the keystone of the Army diagnostic and maintenance program. We assure TMDE reliability by ensuring accurate interval setting. We perform this mission with a team of nearly 600 professionals stationed at 47 different TMDE support activities strategically located around the globe. Our Philosophy – We will provide professional, comprehensive metrology and calibration support, with a focus on quality, cost, innovation, and the CUSTOMER.