The Sonel MRU-200-GPS ground resistance and soil resistivity meter enables the use of all known methods for measuring ground resistance. This makes it an unparalleled measuring instrument among similar products and definitely sets it apart from other similar devices. The Sonel MRU-200-GPS allows you to perform tests using the 3-pole and 4-wire method, with the use of additional clamps (multiple grounding), as well as the double clamp method and pulse method (for ground impedance measurement).
The application of the dual-core measurement method allows for ground resistance measurement under certain conditions without the need for an auxiliary probe driven into the ground. On the other hand, the impulse method is used for diagnosing lightning protection grounding, but it can also be used to measure extensive, multiple and connected grounding (including underground), without interfering with the circuit. By using the impulse method, measurements can be made in accordance with EN 62305 - the grounding impedance needs to be measured. It is worth noting that this instrument also has a built-in GPS receiver, which can record the results as well as the location coordinates. Another function of this instrument is the ability to measure soil resistivity, the continuity of protection and balancing connections, as well as to measure leakage or fault current using clamps.
The sophistication of this device is demonstrated by the excellent accuracy of the results it produces. The instrument is calibrated in accordance with EN 61557 standards and measures from 0.100 Ω.
measuring method
additional function
use
The MRU-200-GPS instrument is specifically designed for the most challenging working conditions. It generates a measurement current of over 200 mA, providing effective measurement for the grounding of energy objects such as substations and power stations.
By using the clip method, the control connector does not need to be disconnected, which is sometimes a very cumbersome task. This is particularly useful when working on objects exposed to weather conditions, where the connecting elements may sometimes be corroded or lose their luster.
The graphical user interface provides clear readings and explicit information. This means fast and trouble-free service.
impulse method
The MRU-200-GPS can be used to test the grounding condition of the lightning protection system, as this instrument can simulate the situation that occurs during a lightning strike - it generates currents with standardized pulse front edges and half-peak times. The available pulse slopes include 4/10 μs, 8/20 μs, and 10/350 μs.
Compatible with the ERP-1 adapter
The ERP-1 adapter enables users to test the grounding system using flexible fixtures. This is particularly useful, for example, in the case of a grid tower – without having to shut down the lines or disconnect the control connectors. The proprietary algorithm allows users to check the direction of current in individual measurements and facilitates damage detection, such as corroded steel bands (housings).
capacity
The measurement methods available in this device enable comprehensive control over both working and protective grounding. The calibration function of the test leads eliminates the influence of their resistance on the results. However, this is just the beginning.
Memory and outcome
The results can be saved in the device's memory. They are divided into 10 groups, each containing 99 units, and each unit corresponds to a measurement value. These results can be easily transferred to the Sonel Reader software for archiving or for subsequent analysis and research.
The Bluetooth wireless interface can be used to transfer measurement results to PC software or mobile phones with the dedicated application Sonel MRU Mobile. This not only provides the function of data archiving, but also enables further data transmission - directly from the measurement site via email.
Suzhou Transfer X Co., Ltd.
Address: No.26, Nanyangli, Gusu District, Suzhou, China
Tel: 0512-80197319
E-mail: service@transferx.cn
