Ive connected up an oil temp sensor.
I have and checked the resistance values against the temperature and its very close to the manufacturers data
I've wired it into analogue 1 on the DL1 and used a 1K pull up resistor
running the light monitor on the DL1 im seeing a reading of about 57 on channel 1 - this matches the expected resistance figure at about 10 degrees C
When I set the dash 2 up to read the chanel 1 value with a 1 to 1 value I see -7!
when I input the correct formula for the sensor and pull up Im seeing a value something like 12500!!
Obviously something is wrong - Any ideas
Connecting sensor via DL1 to Dash 2
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- Location: Darlington
Connecting sensor via DL1 to Dash 2
Polygon motorsport
for all your 7 needs
for all your 7 needs
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- Posts: 20
- Joined: Tue Dec 16, 2008 12:28 pm
- Location: Darlington
At work at the moment so dont have the answers around me
Ive used a spreadsheet that calculates the volts to actual readings, its worked for the water temp, fuel gauge, and oil pressure so far.
Ive input these values into the auto calculate section for setting up sensors in dash2 configuration running version 8.5
Im going to drop some tails off the connector block on the back of the DL1 and use my multi meter to see if im seeing the expected voltages across the divider with the 1K pull up resistor, if that works its a Race logic problem, if it doesnt then I have a wiring problem.
Ive used a spreadsheet that calculates the volts to actual readings, its worked for the water temp, fuel gauge, and oil pressure so far.
Ive input these values into the auto calculate section for setting up sensors in dash2 configuration running version 8.5
Im going to drop some tails off the connector block on the back of the DL1 and use my multi meter to see if im seeing the expected voltages across the divider with the 1K pull up resistor, if that works its a Race logic problem, if it doesnt then I have a wiring problem.
Polygon motorsport
for all your 7 needs
for all your 7 needs
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- Posts: 20
- Joined: Tue Dec 16, 2008 12:28 pm
- Location: Darlington
well the resistance across the sensor is 53Kohms
the voltage across the back of the DL1 with a 1K pull up is 4.82v
so both indicate approximately 14 degrees - which match the water temp
yet the live monitor on the DL1 says 57.92v and the value on the Dash 2 says 1273
So Ive proved my wiring is correct, looks like a DL1 problem. the Dash 2 isn't getting the correct value hence the bizzare figure. What do I do next?
the voltage across the back of the DL1 with a 1K pull up is 4.82v
so both indicate approximately 14 degrees - which match the water temp
yet the live monitor on the DL1 says 57.92v and the value on the Dash 2 says 1273
So Ive proved my wiring is correct, looks like a DL1 problem. the Dash 2 isn't getting the correct value hence the bizzare figure. What do I do next?
Polygon motorsport
for all your 7 needs
for all your 7 needs
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- Posts: 20
- Joined: Tue Dec 16, 2008 12:28 pm
- Location: Darlington
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- Posts: 20
- Joined: Tue Dec 16, 2008 12:28 pm
- Location: Darlington
DL1 recalibration
another day and we are getting somewhere
I had to download a HyperTerminal emulator! (now I'm a mech engineer!)
There are loads on the interweb, but plenty are loaded with spam etc
there are 2 that seem trustworthy PUtty and the one I used Tera Term
I connected the 5v analogues to the 5v supply and had a 12v supply I connected to the 12v analogues
I ran the procedure to the race tech instructions
however the feedback was that it had failed! I ran it several times, same result.
Felt like a lot of work for nothing. BUT when i reconnected everything the results were correct and I had a reasonable voltage reading!
RACE TECHNOLOGY you need to simplify this procedure!
I had to download a HyperTerminal emulator! (now I'm a mech engineer!)
There are loads on the interweb, but plenty are loaded with spam etc
there are 2 that seem trustworthy PUtty and the one I used Tera Term
I connected the 5v analogues to the 5v supply and had a 12v supply I connected to the 12v analogues
I ran the procedure to the race tech instructions
however the feedback was that it had failed! I ran it several times, same result.
Felt like a lot of work for nothing. BUT when i reconnected everything the results were correct and I had a reasonable voltage reading!
RACE TECHNOLOGY you need to simplify this procedure!
Polygon motorsport
for all your 7 needs
for all your 7 needs
Seams like you worked it out.
FYI - the DL1 is a "dumb" logger. It doesn't do any math to translate an input voltage into something "real". The Dash2 and the Analysis program does that. The DL1 just logs voltage values over time.
What I've done with sensors with an unknown output curve is to setup them up on a bench and record the values myself. This is typically with home-brew temperature sensors like you are doing (?).
So basically a pot of water over a stove, thermometer or thermo-couple, a voltage supply and a volt meter.
The input (temperature) / output (voltage) relationship is then put into the Dash2 and Analysis package.
FYI - the DL1 is a "dumb" logger. It doesn't do any math to translate an input voltage into something "real". The Dash2 and the Analysis program does that. The DL1 just logs voltage values over time.
What I've done with sensors with an unknown output curve is to setup them up on a bench and record the values myself. This is typically with home-brew temperature sensors like you are doing (?).
So basically a pot of water over a stove, thermometer or thermo-couple, a voltage supply and a volt meter.
The input (temperature) / output (voltage) relationship is then put into the Dash2 and Analysis package.
BMW 2000 M Coupe
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