The 380-Ce is a high-grade, high-sensitivity circuit tester equipped with a meter movement of 30 microamperes. Its rugged construction along with double meter movement protection device withstands the wear and tear of heavy duty service. The high input impedance of 33.3k ohms per volt obtains accuracy measurement minimizing the current loss of the circuit being checked, and the resistance range covers up to 20 megohms powered by the internal batteries, the midscale reading 200k ohms. Besides the wide range of measurement of DC current from 30 microamperes to 12 amperes, the 380-Ce is provided with AC current ranges of 1.2 and 12 amperes. The unique circuit design uses the shunts in common with DC current measurements obtaining uniform scale characteristic with good temperature and frequency characteristics. The clear mirrored scale obtains accurate reading, and the large-size selector knob rotates the range switch smoothly to set it to a prescribed position securely.