Megger ’s new DET4TC and DET4TCR digital earth testers provide a comprehensive range of options which cover virtually every requirement for earth stake and soil resistivity testing.
Key features of the new instruments are support for true stakeless testing, which allows reliable measurements to be made in situations where driving stakes is impractical, and for ART (attached rod technique) testing, which eliminates the inconvenience and potential hazards associated with having to disconnect earth stakes for testing purpose.
The DET4TC and the DET4TCR also incorporate facilities for standard two- and three-wire fall of potential electrode testing, and for four-wire soil resistivity testing using techniques such as the Wenner method.
For all tests, the users can select the normal test voltage of 50V, or the reduced test voltage of 25V ensuring full compliance with the relevant requirements of EN61557 under all conditions.
Despite the comprehensive range of functions they offer, Megger’s new instruments are exceptionally easy to use, even when operated with gloved hands.
The required test is selected using a single clearly marked selector switch, and is initiated simply by pushing a button. The results are shown on a large liquid crystal display, which is backlit to facilitate use in poorly lit areas such as cable cellars.
Characterised by robust construction and an IP54 ingress protection rating which allow them be used without further protection in tough site conditions, the DET4TC and DET4TCR differ only in their source of power.
The DET4TC is designed for operation from dry batteries, while the DET4TCR is supplied with rechargeable batteries and has provision for in-situ battery charging.
Megger’s versatile DET4TC and DET4TCR digital earth testers can be purchased in basic versions, which comprise the instrument, earth stakes and wire kit and a hard carrying case, with sufficient space to accommodate other accessories, or in the form of complete kits.
In addition to the instrument and the case, the kits include an ICLAMP for ART testing, a VCLAMP for stakeless testing, a clamp calibration loop, an instrument calibration checker, four earth stakes with wires, and adapters to allow the use of a wide range of test leads.
Both basic and kit versions are supplied with calibration certificates as standard and, in the case of DET4TCR versions, a battery charger is also included.