High test current – 2 a.c. (e.g., for aircraft bond testing).
Four terminal measurement.
Two measuring ranges (2000 mΩand 20,00 mΩ) and maximum resolution of 0,01 mΩ.
3 1⁄2-digit L.E.D. display, which is helpful in a poorly lit environment.
Protection against 240 V a.c. and warning lights for added safety.
Applications:
Commissioning and maintenance of substation equipment, where measurements can be made on such things as busbar joints, switch and circuit breaker contact resistance, fuse resistance, cold lap welded joints in aluminium earthing strip and earth bonding.
Maintenance of overhead transmission lines, where “hot” joints can be tested before and after their remaking or recompression.
Bond testing aircraft frames, including the bonding of electronic dischargers and fuel tanks.
Testing earth bonds in mines.
Rail bond testing, where a rail is used as part of a communication system or for power transmission.
Testing the integrity of lightning conductors.
Electronic equipment, where measurements can be made on such things as resistors, track resistance of printed circuit boards (quality control of plating thickness), resistance of plated-through holes on printed circuit boards, contact resistance of relays, resistance of shunts, thick film circuits, etc.
Domestic and industrial wiring installations, where ring main continuity and circuit protective conductor continuity can be measured and the integrity of earth bonding checked.
