The Millivoltmeter M-105

Is designed to measure small voltages in DC circuits.
Millivoltmeters represent portable multirange laboratory instrument magneto system with a direct-reading.
Used in laboratory and workshop practice.

Specifications М105:
The limits of measurement (at the ends of the wires calibrated) - 45 mV; 75 mV; 150 mV; 300 mV, 750 mV, and 1500 mV, 3000 mV.
Accuracy class - 0,5.
Change readings millivoltmeter caused by the temperature change for every 10° C temperature deviates in either direction from the normal - no more than ±0.2% of upper limit of measurement.
Changing indications М105 from the influence of external magnetic field strength 5 e - no more than ±0,5% from upper limit of measurement.
Current consumption:
- at the limit of measurement 45 mW - 4.5 mA;
- at the limit of measurement 75 mV 3.5 mA;
- measurement range 150 mV, 300 mV, 750 mV, and 1500 mV, 3000 mV - 3 mA.

Test voltage insulation between live parts and the housing unit 4 kV.
The scale of the instrument - mirror, is divided into 150 divisions.
Scale length is 140 mm.
Needle М105 made of glass.
Quieting device - electromagnetic.
Settling time - no more than 2 s.
Dimensions - 200×300×120 mm.
The mass of the millivoltmeter:
unit - 4.5 kg;
Millivoltmeter structurally designed in a dustproof plastic housing is rectangular in shape.
Measuring mechanism millivoltmeter М105 consists of a movable frame and magnetic system. The magnet Assembly comprises two permanent magnets having a parallelepiped shape, cast from Nickel-aluminum alloy. To adjust the current consumption of the measuring mechanism is provided with two magnetic shunts.

Operating conditions М105:
Ambient temperature - from +10° C to +35° C.
Relative humidity - up to 80%.
Measurement range millivoltmeter can be extended by attaching a calibrated shunt 45 mV or 75 mV or calibrated incremental resistance at 3 mA (up to 1500), connected to the measurement limit of 3 V.
The accession of the shunts and the measurement in the range of 45 mV and 75 mV is carried out using calibrated wires with resistance 0.035±0.001 Ohm.

In stock - 1pc.