Ampere

Ampere - see "Units".

Ammeter

Ammeter is a device to measure current. Depending on the grading scale devices are divided into actually ammeter to measure the current > 1 a, milliammeter and ammeter to measure current in thousands and millions of shares ampere. In physical therapy is most often used milliammeter. Ammeters include in the electrical network series.

Ammeter is the instrument for measuring the strength of an electric current.
Total for ammeters different systems is the deviation of the arrow on a scale from zero due to the impact of the measured current deflecting system of the instrument. Such a system in devices is: (a) the wire coil (frame), located on the axis between the poles of a permanent magnet (ammeter magnetoelectric, Fig. 1);
b) the iron core, fortified eccentric axis inside the wire coil (A. electromagnetic, Fig. 2);
in) wire with high flow resistance heated by passing through it measured current (A. heat);
g) thermocouple, heated wire with high flow resistance, which passes through the measuring current (A. thermoelectric); d) tube or semiconductor rectifier (detector), through which passes a part of the measuring current and is applied to electromagnetic device (ammeter detector).
Ammeters are divided into actually A. to measure the current > 1 a, milliammeter and ammeter to measure current in thousands or millions of shares ampere. Electromagnetic A. install on a distribution Board mains, milliammeter - apparatus for electroplating (magneto), anode or wire circuits of high-frequency medical generators (electromagnetic, electrothermal or detector), microammeter - and in a variety of research devices.