Boost Pressure Sensor - Incorrect Results so faulty ?
Posted: Fri Mar 30, 2018 7:21 pm
Hi
I am getting incorrect output from the Race Technology Boost pressure sensor. I bought this very recently with a 2m cable. I am using this to measure the intake manifold pressure on my normally aspirated single seater. I understand that this measures absolute pressure and so a zero output indicates a full vacuum and 1 bar output indicates normal atmospheric pressure.
I note from the product page that this sensor gives an output of 0.5v to 4.5v which translates to 0bar to 4bar absolute. I am feeding the sensor with +5v from one of the +5v supply outputs on my DL1mk3.
With the engine not running, and therefore the inlet manifold at atmospheric pressure, I am getting output of 0.98v (0.48bar).
Then when I start the engine and run the engine with a low throttle opening, and showing about 0.8bar of vacuum (0.2bar absolute pressure) on my separate hand held vacuum gauge, the Race Technology sensor is returning 1.15v (0.65bar).
The output I am getting is clearly not correct. I have confirmed the output using a different cable and a different input on the DL1mk3.
It appears to me that the sensor is faulty, but wanted to check on this forum first. Is there anything I could be missing ?
Thanks
I am getting incorrect output from the Race Technology Boost pressure sensor. I bought this very recently with a 2m cable. I am using this to measure the intake manifold pressure on my normally aspirated single seater. I understand that this measures absolute pressure and so a zero output indicates a full vacuum and 1 bar output indicates normal atmospheric pressure.
I note from the product page that this sensor gives an output of 0.5v to 4.5v which translates to 0bar to 4bar absolute. I am feeding the sensor with +5v from one of the +5v supply outputs on my DL1mk3.
With the engine not running, and therefore the inlet manifold at atmospheric pressure, I am getting output of 0.98v (0.48bar).
Then when I start the engine and run the engine with a low throttle opening, and showing about 0.8bar of vacuum (0.2bar absolute pressure) on my separate hand held vacuum gauge, the Race Technology sensor is returning 1.15v (0.65bar).
The output I am getting is clearly not correct. I have confirmed the output using a different cable and a different input on the DL1mk3.
It appears to me that the sensor is faulty, but wanted to check on this forum first. Is there anything I could be missing ?
Thanks