Fluke 1623-2 Manual - Page 39
RA 3-Pole and 4-Pole selective ground resistance measurement with current, clamp
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Earth/Ground Tester Specifications Measurement principle: Current and voltage measurement Measurement voltage: Short-circuit current: Meas. frequency: Probe resistance (RS): Auxiliary earth electrode resistance (RH): Additional error from RH and RS: Um = 48 V ac > 50 mA ac 128 Hz max 100 kΩ max 100 kΩ RH[kΩ] RS[kΩ]/Ra[Ω] 0.2 % RA 3-Pole and 4-Pole selective ground resistance measurement with current clamp (RA ) Resolution Measurement range Accuracy Operating error 0.001 to 10 Ω 0.020 Ω to 19.99 kΩ ±(7% rdg + 3 d) ±(10% rdg + 5 d) Measurement principle: Current/voltage measurement (with external current clamp) Measurement voltage: Short-circuit current: Measurement frequency: Probe resistance (Rs): Auxiliary earth electrode resistance (Rh): Um = 48 V ac > 50 mA ac 128 Hz max 100 kΩ max 100 kΩ Stakeless ground loop measurement ( ) Resolution Measurement range Accuracy Operating error 0.001 to 0.1 Ω 0.020 Ω to 199.9 Ω ±(7% rdg + 3 d) ±(10% rdg + 5 d) Measuring principle: Stakeless measurement of resistance in closed loops using two current clamps Measurement voltage: Measurement frequency: Noise current (Iext): Um = 48 V ac (primary) 128 Hz max Iext = 10 A (ac) (Ra < 20 Ω) max Iext = 2 A (ac) (Ra > 20 Ω) The information about stakeless ground loop measurements is only valid when used in conjunction with the recommended current clamps at the minimum distance specified. 31 MyFlukeStore Shop for Fluke products online at: www. .com 1.877.766.5412