The DET4TC has the best combination
of specification, quality, case design, ease
of use, standard accessories, and practicality on
the market. Included is the current measuring function for
ART (Attached Rod Technique) testing capabilities.
With this added function, on-site grounds can be
tested separately without having to remove the utility
connection. The new DET4TC and 4TCR also provides a stakeless testing
technique.
It allows the operator to use the instrument like a clamp-on ground
tester in applications where that method is viable, while also being able
to operate as a fall of potential tester. The complete kit of instrument, test leads,
stakes, batteries and calibration certificate are delivered in a tough polypropylene carry case -
everything you need to start testing in one package. (Certificate not included with analog model).
Optional terminal adapters are available for acceptance of a variety of test leads.
All models are rated to IP54, making them truly outdoor instruments. They are designed to meet stringent safety
standards and are rated CAT IV 100V. The ground testers have been designed to be easy to use - a large selector
switch makes selection of 2, 3 or 4 pole tests easy with gloved hands - and the design makes the fitting of
shorting links to perform 2-pole tests a thing of the past. A large, clear, easy to read LCD or analog
display and thumb sized test button also make the instruments particularly well suited to the outdoor
conditions of ground testing.
In addition to this ease of use feature,the ground tester automatically checks the connection and conditions of the P spike, C spike, and also the level of ground noise, indicating the status on the display.
(The analog model allows the operator to check the condition of the spikes). The instruments also include a voltmeter to enable measurement of ground voltage.
The DET4TC and 4TCR can measure resistance from 0.01 ohms to 20 k½. Also, to allow accurate testing in noisy environments, the instruments are capable of rejecting noise up to 40V peak to peak.
The Megger digital and analog ground testers are powered by eight AA batteries which are widely available and also give excellent testing time – the status of these batteries is
given by a bar graph on the LCD display, allowing the operator to decide when to change the batteries before they expire. (On the analog model, battery status is
indicated by selecting the function on the selector switch). Also, the new DET4TCR is powered from rechargeable AA cells. The battery charger is built in and the instrument is
supplied with an AC/DC adapter. For all instruments, the battery status is displayed using a bar-graph.
By using the optional ICLAMP the user can augment the traditional fall-of-potential measurement method with ART (Attached Rod Technique), which allows electrode testing without disconnection and also leakage current
measurements down to 0.5 mA. A second optional clamp, the VCLAMP, enables true stakeless measurements to be made in situations where driving stakes is not practical.
The new DET4TC features a backlit display, which extends the operational environment of the instrument to cable cellars and other dark locations.
Finally, they also have selectable 25 V or 50 V output for compliance with IEC 61557-5.
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