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The Fluke 1623 earth ground tester is able to measure earth ground loop resistances using only clamps. With this test method, two clamps are placed around the earth ground rod and each are connected to the tester. Specifications. Operating temperature: 0 °C to 35 °C (32 °F to 95 °F). Temperature coefficient: ± 0.1 % of reading/K. RA 3-pole ground resistance measurement (IEC 1557-5). Measuring range: 0.001 ohm to 19.99 kohm. Resolution: 0.001 ohm to 10 ohm. Intrinsic error: ± (2 % rdg + 3 d). Operating error: ± (5 % rdg + 3 d). RA 4-pole ground resistance measurement (IEC 1557-5). Measuring range: 0.001 ohm to 19.99 kohm. Resolution: 0.001 ohm to 10 ohm. Intrinsic error: ± (2 % rdg + 3 d). Operating error: ± (5 % rdg + 3 d). RA 3-pole selective ground resistance measurement with current clamp. Measuring range: 0.001 ohm to 19.99 kohm. Resolution: 0.001 ohm to 10 ohm. Intrinsic error: ± (7 % rdg + 3 d). Operating error: ± (10 % rdg + 5 d). RA 4-pole selective ground resistance measurement with current clamp. Measuring range: 0.001 ohm to 19.99 kohm. Resolution: 0.001 ohm to 10 ohm. Intrinsic error: ± (7 % rdg + 3 d). Operating error: ± (10 % rdg + 5 d). Stakeless ground loop measurement. Measuring range: 0.001 ohm to 19.99 kohm. Resolution: 0.001 ohm to 10 ohm. Intrinsic error: ± (7 % rdg + 3 d). Operating error: ± (10 % rdg + 5 d). Display:1999 digit LCD Display with special symbols, digit height 25 mm, fluorescent backlight.
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