hot-wire ammeter的意思|示意

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Hot-wire ammeters are one of the most important electrical instruments used for measuring current. It is capable of measuring both AC and DC current, and is often used in industrial or laboratory settings.

This type of meter consists of a metal wire, or hotwire, which runs through a tube filled with air or an inert gas. The current to be measured is passed through the hotwire, and the variations in resistance, due to the variations in the gas pressure, are recorded and then used to measure the current.

In order to use a hot-wire ammeter, it must first be connected to either an AC or DC power source. Once the power source is connected, the meter should be calibrated to measure the correct current. The current should be adjusted until the meter reads accurately, and then the hot-wire ammeter can be used to measure any current passing through it.

To measure the current, the user should start the power source and then connect the meter to the circuit to be measured. The voltage can then be adjusted, and the current should be monitored until the desired reading is achieved. Once the desired reading is achieved, the end user should turn off the power and disconnect the meter.

It is important to note that hot-wire ammeters should be handled with care as they are sensitive instruments. This is because the air or inert gas inside the tube can be affected by external factors and may cause the meter to give inaccurate readings. Therefore, it is important to store the meter in a temperature-controlled environment to ensure its accuracy.

In summary, hot-wire ammeters are versatile and reliable instruments that can be used to measure both AC and DC currents. It is important to remember to handle with care and store in a temperature-controlled environment to ensure accuracy.