Sensor reading c125

D153, D175, C125, C127, C185 and C187 forum

Sensor reading c125

Postby The Outlaw on Wed Apr 09, 2025 8:30 am

Hi all, used my c125 dash/logger for the 1st time at the track last week, checking through the data in my one run using nitrous, my fuel pressure reading seems way off, set at 6.5psi (using a 0 to 15psi sensor) the fogger is triggered through a micro switch that activates soon as I realise the trans brake.. soon as I release the trans brake the fuel pressure sky rockets to 16.2 psi? Pretty sure the reading is wrong.. the plate fuel psi in red is run of same pump.. could it be interference or something else going on?
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The Outlaw
 
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Re: Sensor reading c125

Postby NathanB on Wed Apr 09, 2025 1:22 pm

It is too hard to comment without seeing your config.

You can duplicate you input pin to allow for measuring the raw voltage on your input pin

Duplicate channel.png
Duplicate channel.png (39.88 KiB) Viewed 166 times


Otherwise depending on the wiring configuration of your sensors, something could be wrong there - leading to the AV going to maximum voltage when the button is pressed?
NathanB
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Re: Sensor reading c125

Postby The Outlaw on Thu Apr 10, 2025 3:57 am

Thanks for the reply, the c125 is stand alone just used as a dash and logger,, not linked to the ignition system in any way, the only thing I could think that may have caused this is on release of the trans brake I have SPD2 input triggered on trans brake release to start logging, fogger fuel pressure is AV 6 so no real connection in any way..


NathanB wrote:It is too hard to comment without seeing your config.

You can duplicate you input pin to allow for measuring the raw voltage on your input pin

The attachment Duplicate channel.png is no longer available


Otherwise depending on the wiring configuration of your sensors, something could be wrong there - leading to the AV going to maximum voltage when the button is pressed?
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IMG_7819.jpeg
IMG_7819.jpeg (6.97 MiB) Viewed 154 times
The Outlaw
 
Posts: 19
Joined: Wed Apr 03, 2024 6:30 am


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