Seaward DL500 Loop Impedance Tester. This is a used test meter, last used a week ago. It comes with mains lead for testing. See photo showing Loop Impedance reading. There is no case or additional earth probe. Instructions for use are on the back of the instrument, see photo. Note :- This is a high current tester and it will probably trip a RCD or RCBO, instead of supplying a Loop Impedance reading. It tends to work on the lower ohm range without tripping a 30mA RCD. If it trips the RCD, special techniques are required to test such circuits using this tester including testing upstream of RCD's and should only be carried out by a qualified electrician as it requires access to exposed LIVE connections
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