Just a quick question to see if im correct in assuming this will work,
Im wanting to connect a Borg Warner turbo speed sensor up to my logger, via a USM
In the big .pdf file for my Borg Warner turbo it lists the specs for the speed sensor but mentions using a 'converter box', from what i can tell this just converts from the sensors square wave to a normal 0-5V analog signal that most ECUs/loggers will take, however i think the USM can take the square wave, and i wont require the 'converter box'
Some specs of the turbo speed sensor are;Quote:
The speed sensor is powered by a +5V supply, and the return signal is a variable frequency square wave that has maximum amplitude of 5V and has a 50% duty cycle. The frequency of this signal depends on the speed of the wheel. Each passing blade creates a pulse, and all the EFR wheels have 14 blades except for the 67mm (which has 12 blades). The sensor embedded electronics divides the blade-pass frequency by 8, and then the resulting count forms the output waveform. Here is an example:
100,000 rpm * 14 blades/rev = 1,400,000 blade pass counts per minute
1,400,000 / 60 sec/min = 23,333 blade pass counts per second (Hz)
23,333 / 8 count divisor = 2,917 Hz output frequency
We are currently working with an electronics manufacturer to make a “converter box” that will convert this frequency output into a variable voltage output. By generating a 0-5V signal that is proportional to compressor wheel speed, we offer the end user the ability to easily log or display turbo speed.
Info on the 'converter box' is here http://www.roadragegages.com/tss.htm Questions:1. Is this easly connected to the USM (any input except the 4th), and dont need the converter
2. I have the 67mm so thats 12 blades, 1 pulse per blade = 12 per revolution, sensor divides by 8, so when programming the input on the USM i put pulses per revolution as 1.5? and prog it as Turbo 1 RPM ect?
Thanks,
Brendan
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