Where is a good frequency table good Jiangxi Huajian 5 trough frequency table Digital programmable digital frequency table ..

Overview HJD200 series digital frequency meter is my company electrical measuring instruments more than a decade of experience in the development of sufficient number and researches products developed from the basis of user needs and the new generation of high and low voltage distribution electrical measuring instruments. MCU based on the latest microprocessor technology and modular structure, products with high anti-interference, high stability, high accuracy and so on. Suitable for measuring voltage and frequency parameters distribution system. This series of instruments ratio adjustable support digital inputs, relay outputs, analog output and communications (RS485 MODBUS-RTU protocol), offers a variety of installation size, it can be a direct replacement for analog pointer ammeter, wider applicable to all types of control systems (SCADA, DCS, etc.). Electronic counters: Period is the reciprocal of frequency, since electronic digital counting frequency meter [1] Counter can measure the frequency, of course, can also measure the signal cycle. In principle both are similar, but not identical. Computing measurement frequency and time is defined strictly in accordance with the frequency of measurement, which is known interval in a precise time TO, the number of measured voltage signal recurring N, and then calculate the frequency. For the environment Operating temperature: -10 ℃ ~ + 55 ℃ Storage temperature: -20 ℃ ~ + 65 ℃ Relative humidity: 5% to 95% does not bear installation method: select the size of the corresponding openings in the above table Meter dimensions, In the installation screen surface to open a hole, embedded in mounting holes after two clamping into the clamping slot of the instrument shell, he pushed tight can. Jiangxi Huajian Power Industry Co., Ltd.