Digital Micro-ohmmeter, designed for resistive load test.Based on the 4 wire measuring principle, designed for micro resistance measure,such as the contact resistance of circuit breakers, disconnecting switches and bus-bar resistance.APT CR200A, three range, portable design, with memory, USB Port and RS485 interface.Easily help to do 4 wire resistance measurement. Able for ohmic load. For inductive load, we suggest to be measured by transformer ohmmeter. More details of tester: xaapt.com/2016/0506/346.html Request a free quote anytime [email protected] or [email protected] or with WhatsApp: +86 135 1918 7272, Skype: APT China or you can directly call: +86 29 88897866 or +86 29 82526199