then adjust speed ratio from 1-300 according to your request. 3. After setting, Data is automatically saved. 4. Please note: If your sensor is installed on the flying wheel panel, the RPM ratio is equal to the number of gears of the engine; If the speed signal takes from W-Terminal, the RPM ratio is equal to the half of the number of poles. 5. Normally, When the engine at idle state, tachometer shows 600-800rpm that means speed ratio is correct. -Use moving-magnet principle to drive the needle, featuring good endurance and anti-vibration. 85mm Marine Boat Tachometer 0-3000RPM w/ LCD Hourmeter with M18 RPM Hour Meters For Small Engines ELING Tachometer RPM Indicator With Hour Meter For Car Truck Small Engine Tachometer The Dop Womens Melanie Small Shoulde Bag, Fie Oange Nylon, One Size at Amazon and othe 1. Poducts fom $42.90 at Stylight How to connect wires? Red wire --- Power Positive. Red Backlight, 9-32VDC(12VDC/24VDC) Working Voltage, 100% Waterproof and anti-fogging protection If you need other faceplate , pls. Blue wire --- Power Negative. - Using M4 nut and C type bracket to seal up the gauge. Suitable for diesel engine. Speed Ratio: 1-300 adjustable, You can press the back button to adjust it. Black wire --- RPM Signal. -IP67 waterproof and dustproof grade -Stepper motors used for full range of stepping gauges, great feature with its less power consumption, longer life, higher precision, etc. Please note: Tachometer can be connected to 12VDC and 24VDC power directly. Why Don't get RPM signal? Tachometer sometimes cannot get signal by ignition system. Orange wire (backlight) --- Power Positive. Product Features: -Be suitable for all kinds of tacho RPM sensors, and display the rotation speed of the engine. So, I suggest Tacho sensor signal. It is more stable. Package Includes: 1x Tachometer 1x Multi-plug socket 1x Installation Instruction 85mm Rpm Tachometer Gauge Tach Sensor Rev Counter With Hour Meter... Tachometer can get signal from engine, ignition coil, crankshaft sensor, or tacho sensor (be sold separately), etc..If you need tacho sensor, pls. search for ASIN NO. It shows rpm and hour.
