The low frequency digital phase measuring instrument displays the phase difference between two identical frequency signals in digital form. It is an electronic instrument with readability, high precision and fast measurement speed. The low frequency digital phase measuring instrument adopts current coupling and high resistance input mode to check the phase difference of track circuit and the polarity crossover of adjacent sections, and solves the problem that the adjacent sections can not be inspected when the vehicles are occupied.

The phase of the low frequency digital phase measuring instrument is one of the three elements of the alternating signal (frequency volt phase). Phase difference is an important index to study the relationship between two identical frequency AC signals. Phase difference is the phase difference between two periodic signals of the same frequency. Phase meter is an instrument for measuring phase difference. The low frequency digital phase measuring instrument is specially designed to measure the phase difference of low frequency signal, and the general frequency is sinusoidal frequency signal within 100Hz. The high precision phase meter generally means that the measurement accuracy is very high, and the general measurement accuracy is within 0.2 degrees. The working principle and error source of the low frequency digital phase measuring instrument is to design the content of the low frequency digital phase measuring instrument.

At present, the commonly used low frequency digital phase measuring instrument is to transform the two signals into a Fang Bo, and then calculate the phase difference pulse width by comparing these 2 square waves. Finally, the phase difference is measured by filling the phase difference with high frequency pulse. Low frequency digital phase measuring instrument has oscilloscope method, zero indication method and direct reading phase meter method. The direct reading phase meter has the digital direct reading phase meter method and the vector voltmeter method.

With the rapid development and progress of science and technology, the requirements for measuring accuracy and overall performance of measuring instruments in various measuring industries have been increasing. The traditional analog measuring instruments can no longer meet the needs of the modern society, so the demand for low frequency digital phase measuring instruments is increasing. The SYN5607 type phase meter low frequency digital phase measuring instrument can be used for water depth measurement, electromagnetic wave measurement, power system phase detection device, laser measurement and so on.

The SYN5607 phase meter is a high precision phase measuring instrument designed and developed by our company.The measuring instrument can measure the frequency range from 10Hz to 100kHz and range 0.5Vrms to 100Vrms. The range of measuring the phase difference between two signals is from 0 to 360 degrees. The phase measurement accuracy is + 0.1 degrees, the phase resolution 0.01 degree SYN5607 phase meter belongs to the low frequency digital phase measuring instrument. It can be applied to phase difference measurement of phase voltage in power system, radio navigation system, phased array radar, ranging and location of automatic control system and so on.

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