The Fluke 1623 and 1625
are distinctive Earth Ground testers that can perform all four
types of earth ground measurements. Specifically, the Fluke 1623
and 1625 testers are able to measure earth ground loop resistance
using only clamps - called Stakeless testing. This method doesn't
require the use of earth ground stakes or the disconnection of
ground rods.
3-Pole and
4-Pole Fall of Potential - standard earth ground testing using
two ground stakes.
4-Pole
Soil/Resistivity testing - determine soil resistivity using
four ground stakes.
Selective
testing - without disconnecting ground rods, a technician can
measure ground resistance using a combination of stakes and a
clamp.
Stakeless
testing - innovative solution using only clamps, instead of
ground stakes, to measure earth ground loop resistance.
The Fluke Model 1625 offers these advanced features:
Automatic
Frequency Control (AFC) - identifies existing interference and
chooses a measurement frequency to minimize its effect,
providing a more accurate earth ground value.
'R'
measurement - calculates earth ground impedance at 55Hz to
more accurately reflect the earth ground resistance that a
fault-to-earth ground would see.
Adjustable
limits - for quick test result verification.
