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Seaward ERT 1557
This is the ERT 157 earth resistance tester which is a lightweight unit providing accurate earth electrode resistance measurement without disconnecting the electrode. It is suitable for 110v, 230v and three phase electrical systems and is one of the most competitive resistance testers on the market. You can also use it to measure soil resistivity.
Earth resistance is carried out using 2, 3,and 4 wire method. It has an internal memory that can be downloaded to you PC and can hold up to 500 test results. It includes a large rotary dial for test selection, large LCD and an activation button for simple use. Also supplied are four earth spikes and a full test lead set.