Digital Tachometer 1‑50000RPM 4 Digit LED Display High Precise RPM Speed Meter DC9‑30V Item Type: Digital Tachometer Material: ABS Speed Range: 1-50000 RPM Input Power Supply: DC9-30V Output Current: 20mA (for sensor) Error Range: ±0.5‰-±1.5‰ RPM Display: 4 digit LED Size: Approx. 78x42x24mm/3.07x1.65x0.94in (Standard Panel Size) Mounting Hole Size: Approx. 76.5x39.5mm/3.01x1.56in Speed (RPM) Display Description >50000 FULL Display Overflow 50000~10000 X. XXX X. XXX ten thousand RPM 9999~1000 XXXX XXXX RPM 999.9~100.0 XXX. X XXX.X RPM 99.9~1.0 XX. X XX.X RPM, Thousand Bit Concealment <1.0 0 Automatic Zeroing Display Format Function Name Description HSP High speed alarm value (factory: 0) When the measured speed exceeds the high speed alarm value, the output port outputs a signal, set to 0 to close. LSP Low speed alarm value (factory: 60) When the measured speed is less than the low speed alarm value, the output port outputs a signal, set to 0 to close. FPA Gear molecules (factory: 1) Measured speed x gear numerator / gear denominator FPB Gear denominator (factory: 1) CS Unequally divided gear teeth (factory: 0) When the gear spacing is uneven, this can be used to set the number of pulses sampled for one revolution to measure the speed. Input the number of induced pulses for one revolution into this item. When CS 0, the electronic gear is activated. When CS is not 0, the CS parameter takes effect. LS Minimum measured speed (factory: 60) This parameter is mainly used to accelerate the zeroing time of the tachometer. For example, if the minimum speed is 10RPM, it will reset to 0 in 6 seconds. 100RPM means automatic zeroing after 0.6 seconds without any signal. Unit RPM Lubo Filtering frequency (factory: 1) The maximum can only be set to 18, which is how many times to sample and calculate the average value. CySJ Sampling interval time (factory: 100) The interval time between each sampling. The unit is mm. HFCC Factory reset Set to 0001 to reset factory values.