Professional 2 in 1 LED Dial RPM for Auto Motor Rotating

Profeional 2 in 1 LED Dial RPM for Auto Motor Rotating and high qualityFeatures:we adopt 0.36in dial tube, suitable for 1~8 cylinder autos and motors 12V engine.Our products are with shells and shine brighter.Display battery voltage before and afrer engine startWhen 12V car battery over voltage (overvoltage) or undervoltage, it will be fing alarm.When battery voltage is le than 11V (15V), it will flickering alarm and display the real battery voltage.Specification:Working Voaltage: 8v~17vWorking Current: 40mAVoltage Accuracy: ±0.1V；Rotating Accuracy: ±30round/minMaximym Rotating : 100-31800round/min Color: RedQuantity: 1 PcOther Fixtures:1. This Auto car RPM meter 2 in 1 function meter use Ul bright 0.36 inch dial tube dial display instrument, driven by high performance mcu. Can be used in automobile, motorcycle and other electronic ignition vehicles. Using high integrated design, the size and appearance of the same size as the single function of . Can be easily installed in the card into the supporting housing.2. Behind the instrument on is for adjusting internal s, when it is discovered that the display speed and actual speed inconsistency , then we need to adjust the s (motorcycle idle 1100-1600, idling 750-1200, engine idling in the just started on the high side, hot car stability decreased, such as conditioning load change will influence idle).s depending on the type of engine (such as the horizontal bar, steel, four cylinder), distribution, and wiring position are concerned, specifically according to the s in more detail below as a reference. The mismatch phenomenon is displayed, and the speed of the actual difference, are integer times or several times. This reset the normal s on it.Before installation, please kind carefully read the following details, probl timely and contact customer service. We are very happy to your answer to problem solving.How to adjust the rotate speed s if the real speed is different from the display speedpre on for more than 3 seconds to enter setting state, short pre select frequency, pre more than 3 seconds to confirm , ,then it is ok. The s are saved in the internal chip, even if the power cut and s donen't lost.this meter default s is 22.1 s: adapt to the frequency of 8.33Hz/1000 RPM per cylinder ignition EFI car use.2.2 (the default setting): suitable for frequency 16.66Hz/1000 of four - cylinder EFI (second ) and two-stroke and four stroke motorcycles.2.3 s: three cylinder cars for the use of frequency 25.00Hz/1000 rpm2.4 s: four cylinder cars are suitable for frequency 33.33Hz/1000 rpm turn (with electric cars) an .2.5 s: eight cylinder cars are suitable for frequency 66.67Hz/1000 rpm turn.2.6 s: six cylinder cars are suitable for frequency 50.00Hz/1000 rpm turn.3. This meter displays car engine speed automatically. When car engine started, it begin to show the speed. If battery over voltage,which is bier than 15V(>15V)The meter display speed will be flickering and fing, which is alarm. and notify you this car battery voltage is over. If enginer speed over 10000 rpm/m, for example 15000r/min, the car will display -1504. Working Volt :DC 8V -17VCurrent :40mAVoltage accuracy: +/- 0.1V ;Speed accuracy: +/- 30r/min5. How to wire:Blawire : Ground wire, connect battery negtive output (DC - )Red wire: Power supply, connect battery positive output (DC +)Yellow wire : Speed signal cable, connet to ignitor outlet or trier lines6. Installation guide :6.1 Please connect Red and Blawire in advanced to e sure display is normal to work then you connect other wire. Attention!6.2 The speed signal from the engine ignition signal, can have many wire connections6.2.1 . Electronic wire (some car models have a on special wire for speed, if connect, will have the best quality signal)6.2.2 The high voltage ignition inlet wire (if car have no special speed line, we ase connected here)6.2.3 Ignition outlet wire6.2.4 The ignition trier inlet line6.2.5 The trier outletBecause of each car line is not always the same , above all wiring position may be varying degrees of interference ,result the speed signal is not stable,If your car model have special electronic line,connect it and signal will be absolutely no problem,So best choice is 6.2.1if no have special electronic line, then connect high voltage ignition inlet wire is also good.So second choice is 6.2.2Very Attention!!!Never connect singal cable to high voltage of high voltage ignition outlet wire. You will this auto car meter!!!Note:1.Please allow 1-3cm error due to manual measurement. pls e sure you do not mind before you bid.2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!Package Includes:1 x (without retail package)