Feature

Certifications: CE, UKCA

• Large 4-digit LCD Display, 5s sampling time
  

• 2/3/4-wire earth resistance and soil resistivity measurements
  

• Selectable test frequencies (94Hz/128Hz)

• Disturbance voltage (Ust) and frequency (Fst) measurement

• Earth resistance, RH and RS measurements

• LCD backlight; auto power off

• Data hold

• 20 sets of data storage

• Double insulation

• Compensating resistance RK measurement

Specifications

How are ground resistance and soil resistivity measured?

Ground Resistance Measurement:

• Four-Terminal Method: The UT572 typically uses the four-terminal method (also known as the Kelvin method) for ground resistance measurement. This approach involves two auxiliary electrodes (auxiliary current electrode and auxiliary voltage electrode) and a ground electrode under test for the measurement.

• Current Injection: The tester injects a certain frequency current into the ground through the auxiliary current electrode.

• Voltage Measurement: The voltage drop caused by the current is measured through the auxiliary voltage electrode.

• Resistance Calculation: The ground resistance value is calculated based on the measured current and voltage drop.

Soil Resistivity Measurement:

• Four-Terminal Method: The four-terminal method is also employed, which involves four electrodes (two current electrodes and two voltage electrodes) to measure the soil resistivity.

• Current Injection: Current is injected into the soil through the current electrodes.

• Voltage Measurement: The voltage drop caused by the current is measured through the voltage electrodes.

• Resistivity Calculation: The soil resistivity is calculated based on the measured current and voltage drop.