Is that link correct? I'm getting an Unknown host error.
Some of our earth test-sets operate at the higher frequency to avoid stray 50Hz currents interfering with the measurements.
The traditional test-set seems to be disappearing though, in favor of all-electronic earth-loop impedance testers which measure over as little as one half-cycle of current to avoid tripping GFIs.
I guess their popularity in today's fast-paced world is avoiding the need to drive auxiliary rods -- Just couple up and measure.
[This message has been edited by pauluk (edited 06-01-2002).]
