V2 AD1 voltage adjustments?

[joecar]

thats all I can say!

I just spent the last three hours jerking with this setup! What am I doing wrong?

I started by setting the LM-1 to 1.200 volts for both the high and low scale. Saved it to the LM-1. Next I checked the voltage prior to the V2 by using a voltmeter and pulling it from the set screw pins. Once the voltage was stabilzed I hit the intialize botton.

I then returned back to the LM-1 programming and set the voltage values to 3.200 volts. Save it and rechecked the voltage. Once stabilized I hit the calibrate button. That should be it..........no?

I then spooled up FS with the wideband hooked up. The voltage looked closer. I logged a few seconds of AD1 voltage vs. AFR and it still seems off. If I am not mistaken the math for the LM-1 pid is (AD1*4)+7.35...the math is not working..

My living room looks like an electrical nightmare as I have all this stuff hooked up! LOL!! I really need some help! Need to get this behind me!

Thanks

Howard

Yes, first voltage initialize.... seconds voltage calibrate.... that should be it, that's what I do.

If the LM-1 is programmed as follows, then that calc pid should be correct:

0V = 7.35 AFR
5V = 27.35 AFR

[JezzaB]

Only problem with what you state is that I confirmed the voltage just prior to the V2 with a voltmeter.

I feel your pain mate, I had mine in a death grip screaming "Whats wrong with you!!!" not a couple of days ago.

I had a similar problem with mine. I have a PLX SM-AFR so I couldnt use it to output the 2 reference voltages. I used a 12v DC transformer and set it up. I tried 4 different voltage outputs when it was re-calibrated and it was reading correctly.

As soon as I put the WBO2 connections on it would read a bit out to what I was seeing on the multimeter. I found that if I removed the ground wire (AD1 - terminal wire) it would read very very close. Dont know what it was but had something to do with the ground wire throwing it out.

Goodluck with it mate,
Jez

[Biggsy]

I used a 12v DC transformer .....

WOW! where do you get one of them from???

Cheers,

[JezzaB]

WOW! where do you get one of them from???

Cheers,

Sorry a 12v DC to DC variable power supply. Better

[Biggsy]

lol

[joecar]

Howard,

Try this revised procedure (see red ink): showpost.php?p=43056&postcount=2

Joe

[joecar]

Otherwise try connecting a 10MegOhm resistor in-line with the AD+ input...

[dc_justin]

Yes, first voltage initialize.... seconds voltage calibrate.... that should be it, that's what I do.

If the LM-1 is programmed as follows, then that calc pid should be correct:

0V = 7.35 AFR
5V = 27.35 AFR

Yep, me too. But I don't use anything as fancy as a variable voltage power supply. AA batteries are rock solid on their output. Use one for the initialization (measured with a voltmeter) and two for the calibration.

[Redline Motorsports]

Ok. Got most of it working!

Voltage is with .01+/-!

Now figure this out....

The voltage at the AD1 input is bang on. I confirmed this by using both the LM-1 and LC-1 pids

At 1.59 volts the LM1- pid was at 15.9 (EXT.AD1)*10
0 volts=10.1
5 volts=30.1

At 1.59 volts the LC-1 pid was at 12.12 (EXT.AD1*3)+7.35
0 volts=10.1
5 volts=20.1


BUT the Autronics pid (which I need from the dyno) was showing 14.3 when it should be 16.36! I checked the pid calc in the generic folder and was wondering why if the range is;

0 volts=10.1 and 5 volts=30.1 why the pid should not be the same as the LM-1? Its all relative to voltage input isn't it? The formula is (EXT.AD1*4)+10

Almost back to where I was!

Thanks guys!

Howard

[joecar]

Ok. Got most of it working!

Voltage is with .01+/-!

Now figure this out....

The voltage at the AD1 input is bang on. I confirmed this by using both the LM-1 and LC-1 pids

At 1.59 volts the LM1- pid was at 15.9 (EXT.AD1)*10
0 volts=10.1
5 volts=30.1

At 1.59 volts the LC-1 pid was at 12.12 (EXT.AD1*3)+7.35
0 volts=10.1
5 volts=20.1


BUT the Autronics pid (which I need from the dyno) was showing 14.3 when it should be 16.36! I checked the pid calc in the generic folder and was wondering why if the range is;

0 volts=10.1 and 5 volts=30.1 why the pid should not be the same as the LM-1? Its all relative to voltage input isn't it? The formula is (EXT.AD1*4)+10

Almost back to where I was!

Thanks guys!

Howard

Howard,

You got voltage read from AD1 matching the voltage going into it...

Did you have to do anything special or different from the procedure...?

At steps 3 and 6, did you disconnect the analog signal when you measured it, or did you leave it connected...?


Hmmm...
Those aren't the AFR-voltage points for the LM-1 and LC-1... they look like the display range of the calc pid (when you create a chart/gauge for it, those are the lower/upper values on the gauge/chart), and they don't match what the calc pid emits for 0V and 5V...

Joe