Megger is the manufacturer of the multifunction testers with automatic rcd test feature, megger mft1500. It is available in three options and includes useful additional facilities such as backlit display and range switches, in addition to it the unique illuminated switched probe. The product has an automatic rcd test feature. It is unique in design and is operated easily. These series of instruments use the patented digital and analogue arc display. The analogue arc provides an indication of fluctuating readings, while the digital readout providing the ability to record accurate results.