Ernest Triplett, 1st Maintenance Squadron precision measurement equipment laboratory electronics technician, charts a SR1060 Resistance Box at Joint Base Langley-Eustis, Va., March 20, 2017. The electrical standards section deals with voltage, resistance, current, frequency and power while the physical dimension side of the house works with temperature, linear, force, tension and pressure measurements. (U.S. Air Force photo/Senior Airman Areca T. Bell)