Hoyt 1120ER Digital Earth Resistance Tester

Applications:

• The 1120 ER is a professional instrument.
• The instrument is suitable for the testing of single earth electrodes such as lightning conductors and other small earthing systems.
• The resistance of conductors such as continuuity and condcuit coupling joints can also be measured.
• two terminal operation measurement, which reduces the accuracy, can also be done by shorting P and C terminals.
• The 1120 ER makes measurements by passing a conatant current through the device under test and measuring the voltage across it. The earth resistance is then calculated by Ohm's Law.