Settings of the application
‘Events per revolution'It is the number of pulses seen by the software when the crankshaft of the engine performs one revolution. You need to know that if your combustion engine is a four-stroke engine : there are two crankshaft rotations per working cycle or if it is a two-stroke engine : there is one crankshaft rotation.
So with the microphone or with a cigarette lighter RPM pickup, the formula for determining how many times your engine fires per revolution is :
If you use an inductive clamp around one spark plug wire, the application sees only the pulse from this wire therefore the ‘Events per revolution’ parameter is 0.5 for a four-stroke and 1 for a two-stroke engine.
'Min RPM' and 'Max RPM'You can adjust these settings according to your engine capacity in order to improve the reliability of the RPM.
'Peak threshold research (%)'Use this parameter to adjust the threshold of the tracking of the RPM frequency peak. Try to keep the value as high as possible but decrease it if one of the harmonic peak of the RPM signal is often higher than his fundamental frequency.
'Shift light alarm (RPM)'It is the minimum value of the RPM before the alarm occurs (ie the background screen of the tachometer blinks). For example, in a race car with manual transmission a driver can use it to know when he needs to shift up a gear.
'Shift light sound'Set to ON only if you have an external microphone far from your iphone / ipod speaker or if you have inductive / cigarette lighter RPM pickup otherwise the alarm sound may disturb the RPM measurement.
For advanced users
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