1. Instrument working principle
RS2671 digital megohm meter consists of mid and large-scaled integrated circuits. The instrument has large output power, high short circuit current value and multiple output voltage levels (four voltage levels). Working principle: the built-in battery, as the power supply, generate DC high voltage through DC/DC conversion, which reaches Pole L from Pole E through test object, thus generating current from E to L; the current passes through I/V conversion and measured insulation resistance value is directly displayed on LCD after divider completes calculation.
2. Instrument application range
The instrument is a frequently-used and essential instrument for electric power, post and telecommunication, communication, mechanical and electrical installation, maintenance and industrial enterprises and departments using power as industrial power or energy. It is applicable to measure the resistance of various insulating material, and insulation resistance of power transformer, motor, cable, electric equipment, etc.
This machine set possesses the following characteristics:
Large output power, strong load capacity and strong interference resistance.
The enclosure of the instrument is made of high-strength aluminium alloy, and the instrument is equipped with equipotential protection ring and four-order active low-pass filter which can effectively shield outside power frequency and strong electromagnetic field. For measurement of capacitive test object, since output short circuit current is larger than 1.6mA, it is quite easy to rapidly increase measuring voltage to rated value of output voltage. For low-resistance measurement, since it is designed by proportional method, voltage drop does not influence measurement accuracy.
The instrument does not need manual operation, power is supplied by batteries, and measurement range can be automatically converted. Clear panel operation and LCD display make measurement quite convenient and fast.
Output short circuit current of the instrument can be directly measured, and it does not need loaded measurement for estimation.