1, the use of different:
Grounding resistance tester is the inspection and measurement of grounding resistance of the commonly used instruments, into the years due to the rapid development of computer technology, so the grounding resistance tester is also permeated with a large number of microprocessor technology, its measurement function, content and accuracy of the general instrument can not be compared.
The insulation resistance tester is mainly used to check the insulation resistance of electrical equipment, household appliances or electrical lines to ground and phase to phase, in order to ensure that these equipment, electrical appliances and lines are working in a normal state, to avoid electrocution casualties and equipment damage and other accidents.
2, the measurement of different objects:
Earth resistance is buried underground grounding body resistance and soil dissipation resistance, usually using the type of grounding resistance meter (or grounding resistance shaking table) for measurement.
Insulation resistance tester is suitable for measuring the resistance value of various insulating materials and transformers, motors, cables and electrical equipment insulation resistance . Megohmmeter is electric power, post and telecommunications, communications, electromechanical installation and maintenance as well as the use of electricity as an industrial power or energy source of the industrial enterprise sector commonly used and indispensable instrumentation.
Expanded Information:
Resistance Tester Requirements:
1, Instruments Working environment: relative humidity ≤ 75% RH, temperature 0 ~ 40 ℃.
2, grounding resistance tester must have a person to operate (through training and qualified). The instrument is not used for a long time need to turn off the power.
3. When connecting or disassembling the device, it must be in the "reset" state.
4, the special test line and the instrument connection must be good contact, the resistance to be measured at both ends must be clamped, when adjusting the circuit current must pay attention to the ammeter digital changes, slowly adjusted to the required current value.
5. At the end of the test, press the reset button first, and then return the current to zero. If there is any abnormality during the test, press the reset button first, and then return the current to zero quickly.
6, the detection of unqualified instruments should stop the test and return to the laboratory to send the relevant units for measurement, within 2 hours of the test products or components should be qualified instruments to retest.
7, the instrument should be measured regularly .
Baidu Encyclopedia - Resistance Tester
Baidu Encyclopedia - Megohmmeter