Megger's heavy duty DLRO10HD low resistance ohmmeter combines rugged construction with accuracy and ease of use. It has an internal rechargeable battery and can also operate from a mains supply, even if the battery is completely flat. The DLRO10HD, when used with optional terminal insulating test leads, is rated CATIII, 600V in line with IEC61010. This versatile test set is built into a tough but easy-to-carry case that provides an IP65 ingress protection rating when closed and an IP54 rating when the instrument is in use. The instrument’s rotary switch controls are convenient to operate, and it incorporates a large backlit LCD display that can be easily read from a considerable distance.