Instruments are built into a strong, lightweight case that is equally at home in the field or in the laboratory. Light enough to be worn around the neck, they are small enough to be taken into areas that were previously too small to access. It uses a large, bright 4-1/2" digit LED display. Normally, measurements are made with forward and reverse currents to cancel the effects of any standing voltages across the test sample. The average value is then displayed within 3 seconds, to a basic accuracy of 0.2 percent. To assist operator safety and ease of use, both instruments are supplied complete with a pair of duplex handspikes with 1.2 m. (4') leads. One of the probes is fitted with LED's, which duplicate indicators on the instrument display indicating that all four contacts have been made, the presence of a high voltage across the load, and the presence of current flow while a load is discharging. 2-1/2 hours from a 12 V battery or from a standard 120/230 V AC supply via the supplied charger. Measurement modes: A variety of measurement modes are available. Since the introduction of V2.0 Firmware, normal, auto, continuous and inductive mode are available. The needs for accurate low resistance measurement are well known and very diverse. They range through goods receiving inspection of components to ground bonding and welded joints. Typical applications include, but are not limited to, making d.c. resistance measurements of switch and contact breaker resistance, busbar and cable joints, aircraft frame bonds and static control circuits, integrity of welded joints, inter-cell connections on battery systems up to 600 V peak, quality control of resistive components, transformer and motor winding resistance, rail and pipe bonds, metal alloys, welds and fuse resistance, graphite electrodes and other composites, wire and cable resistance, transmitter aerial and lightning conductor bonding. Measures 8-5/8" width by 4" height by 9-1/2" depth.