The CEM DT-5301 is built around a dedicated microprocessor control system that improves measurement accuracy and minimises error, giving ±2.5% of reading (rdg) accuracy on earth resistance measurement. This delivers dependable results both on new installations and during maintenance work.
The instrument uses a low test current (15 mA) for loop impedance measurement, allowing safe testing without affecting the protective devices in the system. PSC (prospective short-circuit current) can also be read directly, letting you assess how the system's protection would perform under a short circuit.
The CEM DT-5301 has strong safety features. If the test resistor overheats, the instrument engages an automatic lockout, protecting both instrument and user. Three LED indicators on the front panel show phase-neutral orientation and connection faults visually.
The large digital display shows results clearly, while three LED warning indicators (phase, neutral, earth) confirm the connection — reassuring the user that wiring is correct. The display stays highly legible even in dark conditions.
The DT-5301 measures voltage safely across 50V–250V and warns visually when a socket has reversed phase or neutral, so wiring faults are found early and system safety is maintained.
If the resistive load rises above a set level during testing, the instrument stops the measurement automatically — an important advantage for both user safety and instrument life.
The instrument conforms to the international IEC 61010-1 CAT III 600V standard, meaning it can be used safely on high-voltage industrial systems. CEM's durability and reliability support years of professional use.
PSC (prospective short-circuit current) shows the maximum short-circuit current that could arise in the system.
The CEM DT-5301 earth resistance tester is built for professionals, combining accuracy, safety and ease of use. It is among the most dependable solutions for verifying earthing, analysing loop impedance and carrying out PSC tests on industrial systems.
