DT300 CATOHM CATU + Free delivery

The Catohm DT300 is an earth connection tester. It indicates earth resistance in ohms, its compliance, identifies the phase position, checks the continuity of metal masses and verifies the compliance of the connection.

The Catohm DT-300 clearly and instantly indicates the correct connection of the earth terminal and the earth resistance value on its two-colour LCD screen:

- blue display if the installation is compliant and the earth resistance value is < 100 Ohms (maximum limit value set by NF C 15-100).

- red display in the event of a fault or poor earth connection (earth resistance > 100 ohms).

Identifies the position of the phase and neutral.

Measures earth resistance (in TT mode), checks continuity and checks the installation (on standard 2P+T sockets or on low-voltage panels).

Continuity check of metal masses using the safety test probe on a 7-metre extension cord.

Checks the conformity of the 230V connection (displays in red if 380 volts are present or if there is a connection between two phases).

The electronic operation of the Catohm DT-300 requires that the network being tested be powered by 220V/230V. If the electrical circuit is not powered, the earth measurement cannot be taken.

The Catohm DT-300 is designed in accordance with the requirements of NF C 15-100.

Precautions for use:

To operate, the Catohm DT-300 injects a leakage current of 12 mA into the earth wire, which does not interfere with the residual current device. However, if leakage currents caused by ageing appliances are already flowing into the earth connection (without tripping the residual current device), it is possible that when the Catohm DT-300 is connected, the residual current device will trip.
In this case, identify the component or components causing these leakage currents before testing the earth connection again. It is recommended that you switch off your PC to avoid losing any work in progress.