Allen Industries service engineers offer professional Megger OTD oil test set repair service. In fact, we offer repair and calibration service for many models from many manufacturers test equipment. An ohmmeter is an electrical instrument that measures electrical resistance, the opposition to an electric current. Micro-ohmmeters (microhmmeter or microohmmeter) make low resistance measurements. Once your unit is received in, one of our technicians will evaluate your instrument and will send you a formal estimate. Services are performed only AFTER approval. Standard and rush Megger OTD oil test set repair service available. To receive a Megger OTD oil test set repair service quotation, simply fill out the Megger Quick Quote form one of our friendly customer service associates will respond to you shortly.