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The M4100 megohmmeter is used to measure the insulation resistance of electrical networks.

A portable magnetoelectric system device (ratiometer) is designed to measure the insulation resistance of electrical circuits that are not energized. The megohmmeter is used to measure the insulation resistance of electrical wires, cables, connectors, transformers, windings of electrical machines and other devices, as well as to measure the surface and volume resistance of insulating materials. When measuring electrical insulation resistance with a megohmmeter, the temperature and humidity of the ambient air should be taken into account, on the value of which the measurement result largely depends. Megohmmeter М4100, as well as its modifications М4100 / 1, М4100 / 2, М4100 / 3, М4100 / 4, М4100 / 5 shipboard meets the requirements of the Technical Regulations on the safety of maritime transport facilities, the Rules of the Russian Maritime Register of Shipping, Technical Regulations on the safety of inland waterway facilities. transport, the Rules of the Russian River Register. In terms of resistance to mechanical stress, the devices are classified as shockproof (group II). According to the degree of protection against external magnetic fields, megohm meters are classified as category II. The devices are used at ambient temperatures from -30 to +40 C and relative humidity up to 90% (at 30 C). Instrument accuracy class 1.0. Megohmmeter M4100 and its modifications are designed to measure resistance values. Low measurement error of the device, speed of operation and other parameters make the optimal model of this type. Modifications of the M4100 megohmmeters exist in various body versions (there is a so-called `` tropical '' version) The device body is plastic. The moving part of the device is mounted on cores and thrust bearings. The length of the M4100 scale is at least 80 millimeters. Measurement range at the limit of `` MOhm '' covers at least 80% of the entire scale, at the limit of `` kOhm '' is 100% of the scale length. There are modifications of the device М4100 / 1, М4100 / 2, М4100 / 3, М4100 / 4, М4100 / 5 differing in the range of resistance measurement and test voltage The device is powered from a built-in generator with a manual drive (rated rotation frequency of the generator handle is 120 rpm).