Earth test equipment specialists

ET1000 Earth Tester / Resistivity Micro-Ohmmeter

The ET1000 is a versatile 4-terminal test instrument designed primarily for measuring soil resistivity, earth electrode, or grid resistance. The unique micro-Ohm measurement mode enables assessment of equipment earth-bonding connections and condition.

The ET1000 is especially suited to soil resistivity measurements due to its multi-function, high resolution, high noise rejection and high-voltage output feature (which is used to overcome high-current electrode contact resistance in sandy or stony soils).

LCI2000C Low Current Injector

Used to assess the characteristics of an earthing system through the low-power simulation of an earth fault, the LCI 2000C injects a constant current into the earth grid under test. The frequency of the test current is variable from 45 Hz to 65 Hz (in 1 Hz Steps), and can be differentiated from power system frequency using tuned voltage meters (TVM1100 Tuned Voltmeter).

The configuration can be used to determine the impedance and resistance of the earthing system and earth grid, respectively, earthing-related voltage hazards, and earthing-related voltage contours.

The LCI2000C output is isolated from the input supply. All functions are controlled from the push buttons and colour LCD on the front panel.

TVM1100 Tuned Voltmeter

The TVM1100 tuneable volt meter has been specifically designed to accompany the LCI2000C injection unit, though it can be used for the measurement of voltages associated with any off-frequency current injection test.

With its excellent noise rejection, the instrument can be used to measure the often very small voltages associated with injection testing of large earthing systems, even where power system frequency noise dominates.

The instrument is equipped with a full range high input impedance voltage measurement channel to ensure accurate prospective voltage measurements, and a second channel designed as the input for a flexible or clamp CT. Current and voltage measurements can be displayed simultaneously along with the applicable phase shift.

The instrument features an intuitive user interface and colour LCD screen, GPS tracking and measurement data logging, making Fall of Potential and other measurements paper-free.

ST1000 SWER Tester

Single Wire Earth Return Systems tester.

Testing the earthing systems associated with a SWER system with traditional methods often requires obtaining an outage on the plant.

The ST1000 uses the SWER transformer load current as the earthing system measurement current. It has two CT inputs and one voltage input to derive individual electrode resistances or system impedance and grid resistance. Rudimentary touch and other voltage hazard measurements can also be obtained.