Microammeters and millivoltmeters of the LM series.
Instruments for adjusting and controlling the PTA.Microammeters and millivoltmeters of the LM series. Graduated from 1954. Microammeters and millivoltmeters of the LM type (LM, LM-1) are portable laboratory single-limit devices of the magnetoelectric system with direct reading, designed, respectively, to measure the current and voltage in DC circuits. Microammeters and millivoltmeters were produced for the following measurement ranges: 0 - 50; 0 - 75; 0 - 100; 0 - 150; 0 - 300; 0 - 500; 0 - 750; 0 - 1000 mka. 0 - 10; 0 - 15; 0 - 30; 0 - 45 mv. Accuracy class - 0.5. The operating temperature range is from +10 to +350 C. The change in the readings of the device from the temperature drift away from the normal (+ 200C) does not exceed +/- 0.5% of the upper limit of the scale for every 10 degrees. The change in the readings of the device due to the influence of an external magnetic field does not exceed 2.5% of this reading. Overall dimensions of the device are 175x170x129 mm. Weight 1.7 kg. The price of the device is 296 rubles (1954).
