The TT1000A is a completely self-contained, battery-powered, aircraft turbine temperature system tester capable of measuring system lead resistance, insulation, and performing indicator runouts with a range up to 1000 °C. The unit was specifically designed to meet all requirements for testing aircraft Chromel/Alumel (CH/AL) turbine temperature measuring systems and provides an accurate display of thermocouple outputs millivolyage in degrees Celsius (°C).