lexsom Posted June 24, 2008 Share Posted June 24, 2008 I have already posted this on the LabJack forum however they suggested that I also post it here. Labjack forum post I recently purchased a JabJack U3-HV and also a JabJack U3-HV OEM board. The OEM board will eventually be incorporated into a vehicle to monitor and log various data from the Engine Control Computer as well as other sensors that have been installed. I am having trouble getting a sensible readout from a timer recieving the signal from the Tacho output from the engine management computer. This signal comes from the camshaft and therefore puts out 1 pulse per 2 engine revolutions. I have confirmed this with an oscilloscope. eg 8.3333 Hz for 1000 RPM. The main problem I am having is that the displayed number decreases as the RPM increases !!!! The 'Speedo' display also decreases as speed increases. I do not understand how this is occurring. Please note that I know absolutely nothing about programming. Everything so far has been a EngineMonitorTest.ctl Link to comment Share on other sites More sharing options...
LabJackSupport Posted July 7, 2008 Share Posted July 7, 2008 Topic on LabJack forum: http://www.labjack.com/forums/index.php?showtopic=3400 Link to comment Share on other sites More sharing options...
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