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MS5205 device for measuring insulation resistance manufactured by Mastech (China). Equipment, design, measurement of DC voltage, performance testing and measurement of internal resistance of the multimeter at test voltages of 250 and 500 volts. Detailed technical specifications, availability and cost of Mastech MS5205 can be found on the Viva-Telecom website: https://viva-telecom.org/13818/mastec... #Mastech