Grid Bonding Tester: MODEL ECT-4

The ECT-4 is a 4 wire Kelvin micro-ohm meter used to check the
electrical quality of metallic structures and their connection integrity
to other bonded structures in grids and electrical systems such as a
sub-station or transmission station.

A custom back pack carry case houses a power source which injects
discrete levels of current at 1, 2 or 3 Amps directly between two points
in the grid connected network.

The ECT-4 and it’s extension reel accessories allow this test to be
performed over small or large distances using a single Earth reference.

The ECT-4 has filtering for excellent 50Hz and 60Hz rejection and also
features 5 current direction modes to further mitigate DC offset and
interference:

The 5 current direction modes are:
– Forward
– Reverse
– Pulsed Forward – pulse duration can be changed in 1 second increments
– Pulsed Reverse – pulse duration can be changed in 1 second increments
– Pulsed Bipolar with or without dead time – dead time duration can be changed in 1 second increments

Measurements are taken with a moulded hand probe which includes twisting retractable stainless steel
pins used to make the surface connection with a bonded metallic object.

The hand probe has a 5cm backlit LCD which displays the results of the bond down to a 10uΩ resolution.
The injection mode described above and current range can also be selected on the hand probe via three
tactile push buttons.

The ECT-4 runs off a separate battery, also carried in the back pack, giving the operator single handed
operation and superior mobility while performing continuity tests for over 5 hours.

The ECT-4 comes with all accessories necessary to begin testing straight out of the box.

Please download the data sheet for more information.