The power meter measures the instrument of electrical power.Generally refers to the power meter that measures power in DC and low -frequency technology, and can also be called Watter.The power meter is composed of two parts: power sensor and power indicator.The power sensor is also called a power meter probe. It converts the high -frequency electrical signal through energy into a electrical signal that can be directly detected.The power indicator includes signal amplification, transformation and display.
Power meter
1. It is used to measure the absolute light power or relative to the relative loss of the optical power of a section of optical fiber.In the optical fiber system, the measuring light power is the most basic, very much like a universal watch in electronics.In optical fiber measurement, the optical power meter is a commonly used table for heavy load.2. By measuring the absolute power of the transmitter or light network, a light power meter can evaluate the performance of the light end equipment.The combination of light power metering and stable light sources can measure connection loss, test continuity, and help evaluate the quality of optical fiber link transmission. 3. DB function with direct insertion loss measurement.
How to connect the power meter
There are two types of wiring methods: internal connection and external: First, when the measurement current is small, such as the air load of the switching power supply, the internal connection method is used to cut the lines of the input end of the switching power supply input terminal.Extreme, the power meter current terminal positive connection voltage terminal positive pole, leads a line from the zero line to receive the negative electrode of the voltage terminal.The fire line is cut off, and the current terminal of the current terminal of the power meter is positive and negative. The power meter current terminal is positive.It should be noted that if you want to measure the larger power supply, because the current is large, the voltage drop on the shunt cannot be ignored, and the voltage terminal is directly connected with the switching power input terminal.
Power meter brand
Elix brand-Power meter brand introduction: Elek brand was established in 2002. The company is located in Shenzhen. It mainly develops and produces weak electricity products.EssenceProduct introduction: A power meter of EM701, a model of Elek brand, is 40 yuan.This product can not only record the current power value, but also the total time of electricity consumption, and calculate the emissions of carbon dioxide.Back -light wide -screen LCD shows that the value looks more accurate.The slightly high ground plug -in design is fully conforming to the national standard security design, and it is more at ease.
Principles of power meter
Convert the radio frequency power to thermal energy, measure the sum of the energy generated by it, and then convert it to the corresponding power reading.In the hot puppet measurement method, the test results are basically not affected by the signal waveform.However, the cost, physical size, test response time, the required attachment equipment, cables and AC power supplies required for test response time determine that it cannot be widely used.

Related tags： Machinery