The megohm meter ES0202/1G instead of M4100. Megger
with a range of measurement of 0 - 1 000 megohms, measuring tension: 100, 250, 500 Century. The megohm meter ES0202/2G with a range of measurement of 0 - 10 000 megohms, measuring tension: 500, 1000, 2500 V
Are intended for measurement of insulation resistance of the electric chains which are not finding energized. Have a non-volatile power supply from the built-in generator inductor
Megohm meters with a non-volatile power supply - the built-in inductor generator devices of the ES0202/1,2G, ES0210/1-3 G series, (there were M4100/1-5 earlier), similar to which, except us nobody lets out any more. They will help out at any time, when there is no an opportunity to recharge the accumulator or to replace batteries, or in emergencies - when there is no electric power just. These devices are analog and are not afraid of low temperatures. Despite an error +/-15 from the measured value, they perfectly cope with the direct task - an assessment of a condition of insulation resistance which value they - is normal or close to critical.
Our megohm meters are unique the fact that they have a non-volatile power supply - from the built-in inductor - the generator, i.e. at any time and any conditions, especially low temperatures - they are ready to work, the accumulator a good thing, but demands periodic recharge and is afraid of a frost. Though - also we have megohm meters with accumulator supply, these are the digital megohm meters TsS0202-1 for a temperate climate (-10 - + 55C) and TsS0202-2 for northern latitudes (-30 - + 55C), and also already on sale a digital microohmmeter of TsS04105.