Because the grounding resistance tester is a relatively precise electronic measuring instrument,Earth Resistance Tester its measurement accuracy has a direct impact on the safety of the circuit. If the environment is not suitable or improper operation will cause measurement errors, reduce the accuracy of the resistance test,Earth Resistance Tester which mainly includes the following Factors: Buried grounding devices are more complicated. Such as gas stations, chemical plants, etc.Earth Resistance Tester because the underground metal pipelines are complicated to arrange, according to the normal detection connection,Earth Resistance Tester the presence of underground metal changes the direction of the current at each end, often causing measurement errors.

Poor contact: The connection point of the grounding resistance tester is often broken because of the frequent twists and turns,Earth Resistance Tester and it is difficult to find out because of the existence of the protective sleeve, which is a phenomenon of breaking when it is broken. There is a large potentiometer at the ground surface: transformers such as factories and comprehensive buildings are grounded. For various reasons,Earth Resistance Tester the grounding resistance becomes larger,Earth Resistance Tester the insulation of the transformer itself deteriorates, and leakage occurs,Earth Resistance Tester causing a potential difference around the ground electrode. Around it, Earth Resistance Tester it will affect the measurement accuracy.

The soil resistivity is very large: when the sandy soil with poor water absorption is used as the base layer of the entire building, the ground resistance often measured is too large. The measured ground electrode itself has an alternating current. In the early days,Earth Resistance Tester the structure of the building was chaotic,Earth Resistance Tester the wiring was disordered, and sometimes the potential difference of the ground zero line was above 100V,Earth Resistance Tester which directly affected the measurement error of the grounding resistance.

The detection line is too long. When detecting high-rise buildings,Earth Resistance Tester the excessively long detection line induces voltage and causes detection errors. At the same time,Earth Resistance Tester the long line itself also has wire resistance. Operation is not standard. The operation is not carried out in accordance with the rules of the manual. Perhaps the improper maintenance of the grounding resistance tester will cause instrument failure. There is a strong electromagnetic field nearby. In the vicinity of the high-power launching base,Earth Resistance Tester such as mobile communication fields,Earth Resistance Tester high-voltage substations and high-voltage lines, high-power equipment is frequently started.