| The AEMC 6290 accurately measures extremely low contact resistance for high voltage busbars, switches, circuit breakers, etc., with testing currents of 200 Amps maximum. The 6290 Micro-Ohmmeter utilizes the 4 terminal Kelvin test method in order to prevent testing errors due to test leads & their contact resistance. Measurement accuracy of the 6290 is guaranteed by state of the art signal amplification circuitry, offset free with long term high stability. Resistance test results are displayed with a 4 1/2 digit resolution with measurement resistances to 20 MegaOhms, & a resolution of 0.1 microOhm. Test current can be manually adjusted & are measured with an analog bar graph indicator & digital backlit display. The 6290 features internal memory that stores 200 readings, and its USB interface is easily connected to PC for downloading your data. The high current generation circuitry is designed with cutting edge technology which allows for significant decreases in weight, 24.25 pounds (11 kilograms), & size. The protective case is constructed with hard plastic (IP54 with lid closed) which is highly impact resistant and withstands harsh environmental conditions. With thermal internal sensor protection in every sensitive component damage due to overheating is prevented. | 