Seaward Bracken Hill, South West Industrial Estate, Peterlee, SR8 2SW Tel: +44 (0) 191 5863511 Web: www.seaward.co.uk Email: [email protected] Fax: +44 (0) 191 5860227 ERT 1557 Suitable for use on 110 v, 230 v and three phase electrical systems, this special lightweight unit provides accurate Earth electrode resistance measurement without disconnecting the electrode. It can also be used to measure soil resistivity. Earth resistance measurement is carried out using 2,3 and 4-wire method. The ERT has an internal memory for 500 test results which you can download to your conventional PC. Its user-friendly features include a large rotary dial for test selection, large LCD and simple push button test activation. The unit is supplied with four Earth spikes and full test lead set. The ERT is one of the most competitive Earth resistance testers on the market. A new high specification Earth Resistance Tester. Key Features n Current Clamp measurement n Earth Resistance measurement n Battery powered n Download to PC n Store up to 500 records n 2, 3, or 4 wire measurement Ideal Users n Telecomms engineers n Power systems engineers n Electricians n Electrical contractors

Web: www.cropico.com Email: [email protected] WORLD LEADERs IN SAFETY TEST AND MEASUREMENT G R O U P SEAWARD PRECISION INSTRUMENTS CROPICO MEDICAL RIGEL INDUSTRIAL SAFETY INSTRUMENTS CLARE PORTABLE ELECTRICAL SAFETY INSTRUMENTS SEAWARD Seaward test and measurement companies include: ERT 1557 SPECIFICATIONS TESTS Earth Resistance 2, 3 and 4 wire method Display Range 0.00ohm - 50.0kohm Measuring Frequency 125 Hz +/- 1 Hz Measuring Current <20mA effective Measuring Voltage <50V effective sine wave Earth Resistance using current clamp Display Range 0.0ohm - 2.00kohm Measuring Frequency 125 Hz +/-...