oil pressure incorrect reading please help

sgsmotorsport
Posts: 7
Joined: Sun Mar 27, 2022 2:05 pm

oil pressure incorrect reading please help

Postby sgsmotorsport » Tue Mar 29, 2022 4:55 pm

Hi , i hope someone can help me.
i have installed a new Dash2 in my race car with an oil pressure sensor.
the problem i have is when the engine isnt even running the dash is showing -17.2
how can i sort this issue. it is a quality 10bar 5v three wire sensor.
my race season starts in 2 weeks and i need to try and resolve this issue as its very un nerving.
hope someone can help
kind regards

Support
Posts: 397
Joined: Mon Nov 21, 2005 4:09 pm

Re: oil pressure incorrect reading please help

Postby Support » Wed Mar 30, 2022 8:07 am

What is the make and model of sensor?
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sgsmotorsport
Posts: 7
Joined: Sun Mar 27, 2022 2:05 pm

Re: oil pressure incorrect reading please help

Postby sgsmotorsport » Wed Mar 30, 2022 9:56 am

its a defi pdf00703s
regards stewart

Support
Posts: 397
Joined: Mon Nov 21, 2005 4:09 pm

Re: oil pressure incorrect reading please help

Postby Support » Wed Mar 30, 2022 10:23 am

What equation are you using for this sensor in the dash config?

What is the sensor output in volts at ambient pressure and full scale?
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Posted by Race Technology Support

sgsmotorsport
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Joined: Sun Mar 27, 2022 2:05 pm

Re: oil pressure incorrect reading please help

Postby sgsmotorsport » Thu Mar 31, 2022 11:16 am

See attached screenshot
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sgsmotorsport
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Re: oil pressure incorrect reading please help

Postby sgsmotorsport » Thu Mar 31, 2022 11:25 am

output volts with zero pressure is 0.643 no idea what it is at maximum as i cant send 10 bar to the sensor as its fitted in the engine.

Support
Posts: 397
Joined: Mon Nov 21, 2005 4:09 pm

Re: oil pressure incorrect reading please help

Postby Support » Thu Mar 31, 2022 11:54 am

The equation you have selected is for the Race Technology supplied pressure sensor. You are using a different pressure sensor and this has different characteristics when compared with the Race Technology supplied pressure sensor.
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sgsmotorsport
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Joined: Sun Mar 27, 2022 2:05 pm

Re: oil pressure incorrect reading please help

Postby sgsmotorsport » Thu Mar 31, 2022 12:15 pm

sorry i mis understood the question. the range is 0 to 10 bar sensor. but i have the dsah to read in psi.
regards stewart

sgsmotorsport
Posts: 7
Joined: Sun Mar 27, 2022 2:05 pm

Re: oil pressure incorrect reading please help

Postby sgsmotorsport » Thu Mar 31, 2022 12:16 pm

so how do i set this up ? i was told you can use other makes of pressure sensor with the dash 2

DIGGIDY
Posts: 7
Joined: Fri Jan 14, 2022 9:00 am

Re: oil pressure incorrect reading please help

Postby DIGGIDY » Thu Mar 31, 2022 3:50 pm

You need a calibration map to setup the sensor, ideally you would get that from the sensor manufacture, but I can't see one anywhere for that sensor.

You can map them yourself with a handheld pressure tester, but that extra expense for a single use? meh! Just as well purchase a new sensor with a published map or just get a RT one.

However, I did find a map which somewhere else had recorded and posted for that sensor, i may not be totally accurate, but close enough.

http://bbs.22b.com/forums/showthread.ph ... ion-Curves

Just follow the last part of this topic to configure a custom map equation

https://www.race-technology.com/wiki/in ... ogueInputs

X = sensor voltage
Y = output value (psi)

sgsmotorsport
Posts: 7
Joined: Sun Mar 27, 2022 2:05 pm

Re: oil pressure incorrect reading please help

Postby sgsmotorsport » Wed Apr 06, 2022 11:44 am

your a legend ! got it all sorted and correct pressure reading. so thank you. now all i have to do is get the rest of the dash to work and it wont be too bad. 4 weeks i have been trying to get this sorted , was told there is something wrong with my omex ecu, so sent it to omex they checked everything and updated everything. ecu is perfect but still no telemetry on dash. except for oil pressure which you helped me sort.

DIGGIDY
Posts: 7
Joined: Fri Jan 14, 2022 9:00 am

Re: oil pressure incorrect reading please help

Postby DIGGIDY » Wed Apr 06, 2022 4:05 pm

What other problems are you having, not sure I can help much, but happy to give it a go ?

I've was in the same situation for weeks trying to figure stuff out, and Support from RT is not very forthcoming at the best of times I'm afraid, even direct support is slow, so if you want an answer be prepared to wait a good while, or call them and ask them to respond to your support request reference number if you don't get a response in 48 hrs.


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