Specifications
The TL-5 Earth Resistance Meter is powered by an internal rechargeable battery (12 V - 2.3 Ah) and includes a battery charger compatible with 95 - 240 Vac, 50-60 Hz. It features a short-circuit current of less than 3.5 mA. The measurement circuit covers resistance from 0.01 Ω to 20 kΩ, resistivity from 0.01 Ωm to 50 kΩm, and voltage from 0 to 60 Vac. Accuracy for resistance, resistivity, and voltage is ±2% of the measured value plus 2 digits. Reading resolution is 0.01 Ω for resistance, 0.01 Ωm for resistivity, and 0.1 V for voltage. Communication is facilitated through a USB series output, with an optional printer (PR-01).

Ambient Conditions
The device operates within a temperature range of -10 to +50 ºC and can be stored between -25 to +65 ºC. It supports a relative humidity of up to 95% (non-condensing) and a maximum operational height of 3,000 meters.

Build Features
The dimensions of the TL-5 are 274 x 250 x 124 mm, with a weight of 3.6 kg. It has a degree of protection rated at IP 54 when the cover is closed.

Standards
The TL-5 complies with several standards, including IEC 61010-1/1990, IEC 61010-1/1992 appendix 2, IEC 61326-1, IEC 61000-4-3, and IEC 61000-4-2.

Features Description
The TL-5 is a digital earth resistance meter controlled by a microprocessor, designed for measuring earth resistance and resistivity using the Wenner method. It is fully automatic and user-friendly, checking installation conditions before readings and alerting users to any abnormalities. The device allows selection between two frequencies (270 Hz or 1470 Hz) for test current generation, optimizing earthing tests. It has four resistance measurement ranges from 0.01 Ω to 20 kΩ. The TL-5 is ideal for monitoring earthing systems in substations, industries, and energy distribution grids, compliant with IEC 61557-5, and useful for measuring specific earth resistivity to optimize earthing system projects.

References
The Earth Resistance Meter - 4 ways is identified as TL-5 with the type code P60621.