interior accessories Speedometer Brushless Motor Special Tachometer Speed Sensor Digital Frequency Meter Digital Meter Features: 1: Adopt industrial-grade high-speed MCU, strong anti-interference 2: Stable and reliable 3: Features of wide measurement range and high measurement accuracy 4: Small appearance 5: Widely used Newly developed, tailor-made three-phase DC brushless drive products supporting tachometer, using industrial-grade high-speed MCU, strong anti-interference, stable and reliable, wide measurement range and high measurement accuracy, the software adopts the leading fully synchronous cycle measurement method, the measurement range And the measurement accuracy is a more qualitative leap, applicable to all three-phase DC brushless drive boards and drive modules with rotational speed signal output on the market, and the three-phase brushless drive products independently developed by our store have reserved interfaces for plug-and-play. Two setting buttons on the back and interface line definition Note that this product has reverse connection protection. The default power supply voltage is DC 3.3-5V, and the measured signal amplitude is 3-30V. If this parameter is exceeded, it may be permanently damaged. Specifications: 1. High frequency measurement accuracy, up to 0.01 at 25 degrees Celsius, and resolution up to 0.001HZ. 2. The frequency measurement range is wide, 0.15HZ-100KHZ. It can also be customized for ultra-low frequency measurement 0.01HZ-100HZ3. The range is automatically switched from 00.000Hz (R/M to 000.00KHz (KR/M). 4. The working mode can be switched by pressing the button, including two working modes of frequency and speed, and the working mode is saved when power off. 5. The frequency division value can be set by pressing the key. The frequency division value can be 1-99999 and 0.0001-9.9999. The frequency division value is saved after power-off. 6. Beautiful appearance, sophisticated craftsmanship and easy to use. Display digits: 5-digit LED digital tube (0.36). Display refresh rate: signal frequency 3HZ: 3 times/sec: signal frequency 3HZ: approximately equal to the signal frequency. . Overflow display: ----- Measurement accuracy: 0.1%1digit or 0.01 at 25. Measuring range: 0.15HZ100KHZ. 9r-999.99Kr/m Input signal: Type: dry contact, PNP, NPN, pulse Amplitude: 3-30V Measurement method: fully synchronized period measurement method. Input resistance: 100K/resistive. Power supply: default DC3.3-5V, other voltages are needed, large quantities can be customized Withstand voltage: AC2000V 1min between the external terminal and the shell. Use environment (temperature and humidity): temperature-10-70 relative humidity 25-85% (no condensation), Storage temperature: -20-+80 (no condensation) Dimensions (mm): 48*29*18.5 length X width X height) Opening size (mm): 45*26 Use method: 1. There are three wires on the meter head, the red is the 3.3-5V positive power supply, the black is the ground wire, and the yellow is the signal pulse input wire, which are connected to the equipment under test respectively. 2. Switch between speed measurement and frequency measurement mode There are two buttons M mode and S selection on the back. When the power is on, press the M key once to enter the mode selection interface, and then select 0 frequency plus filter wave test by continuously short pressing the S key, and select 1 speed plus filter wave test. Choose 2 frequency without filter wave test, choose 3 speed without filter wave test, wait 4 seconds without operation, automatically save and