Fluke 1625-2 User Manual - Page 15

Earth/Ground Tester Features Features The 1625-2 Earth/Ground Tester (Tester) is an earth resistance meter with fully automated measuring frequency selection process. The Tester includes automatic testing of probe and auxiliary earth electrode resistances and possible interference voltages in accordance with DIN IEC61557-5/EN61557-5: • Measurement of interference voltage (UST) • Measurement of interference frequency (FST) • Measurement of probe resistance (RS) • Measurement of auxiliary earth electrode resistance (RH) • Measurement of earthing resistance 3-pole, 4-pole, (RE) with or without using the external clip-on current transformer for selective measurement of single earthing branches in mesh operated earthing systems  • Resistance measurement 2-pole with ac voltage (R~) • Resistance measurement with dc voltage 2-pole, 4-pole, (R) With its various possibilities of measurement and the fully automated measuring sequence control (incl. automatic frequency control AFC), this instrument offers the latest measuring technology in the field of earthing resistance measurements. By means of the selectable limit input with visual and acoustical confirmation/error message and with the code programmable and customer defined special functions, such as measuring voltage 20 V (for agricultural systems), earthing impedance R* (measuring frequency 55 Hz) switched on or off, these instruments are individually programmable for use as a simple meter as well as a high end fully automated measuring device. The Tester includes automatic testing of probe, auxiliary earth electrode resistances, and possible interference voltages. See Table 3 for a list of features and functions.  Warning • No voltage permissible to sockets Do not open or close the instrument with force. • Disconnect all leads before opening the instrument. 7