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Calibrate the resistance tester in three steps

time:2021/1/25   source:华天电力  reading:288 time

The resistance tester includes microprocessor management technology, and the measurement data accuracy requirements will be further improved. In order to ensure the safety of a process that can be used, it is used for system testing of the DC resistance of transformers, motors, transformers and other equipment. Temperature change range: working environment temperature 5 degrees Celsius to 49 degrees Celsius, with high accuracy, good retestability, single button operation, simple and easy to use resource advantages, the main introduction of the calibration analysis method of the resistance tester.


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Step 1: Open the cover, carefully cut off the wires on the board connected to the power switch, look for the three calibration regulators on the lower right corner of the circuit board; under this environmental condition, let the meter for at least 1/2 hour, and then start after balancing test.


Step 2: Connect one end of the cable to the alligator clip and the other end to the banana plug. Use the alligator clip to connect the two ends of the resistor, three calibration regulators, the upper part is the "humidity" measurement, the middle is the "impedance", The following is "Adjust the temperature with a small screwdriver", the clockwise direction is adjusted according to the increase value, and the counterclockwise direction is adjusted according to the decrease value.


Step 3: Press the power switch and compare the values of "temperature", "humidity" and "resistance" at the same time.


The digital grounding resistance tester is specially designed and manufactured for on-site grounding resistance measurement. It adopts new digital micro-processing technology and three-wire or two-wire method to measure grounding resistance. It has a unique line resistance detection function, anti-interference ability and environmental adaptability. It ensures the high precision, high stability and reliability of long-term measurement, and is widely used in the measurement of grounding resistance of electric power, telecommunications, meteorology, oil fields, construction, lightning protection and industrial electrical equipment.


The digital ground resistance tester has a unique wire resistance verification function, which can measure low-value ground resistance more accurately, avoiding errors caused by long-term wire resistance changes in the test line; it can avoid the test line being not fully inserted into the instrument interface or caused by poor contact Error; can avoid errors caused by user replacement or extension of the test line.

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