CAJ Innovations Forums - Volts v AFR:Optimiser LCD

Mad Farquhar Full Member Offline Slainthe mhath Posts: 171 Black Isle, Scotland Gender:	Volts v AFR:Optimiser LCD 04/23/12 at 05:33:46 OK - have ~~read~~ skimmed through the bumpf on Optimiser and LC1 and must have missed it. Is there a way of displaying the AFR instead of voltage on the Optimiser LCD?
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Luhbo Full Member Offline I Like My15M! Posts: 191 Germany	Re: Volts v AFR:Optimiser LCD Reply #1 - 04/23/12 at 06:17:01 If I remember correctly it was done by reprogramming the probe output. I don't have a LC1, but the WBO2 product I'm using features something like that (with the help of Excel files, btw.) Hubert
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Mad Farquhar Full Member Offline Slainthe mhath Posts: 171 Black Isle, Scotland Gender:	Re: Volts v AFR:Optimiser LCD Reply #2 - 04/23/12 at 06:30:54 Thanks - I'll need to have a proper look at the LC1 manual again next week.
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Luhbo Full Member Offline I Like My15M! Posts: 191 Germany	Re: Volts v AFR:Optimiser LCD Reply #3 - 04/26/12 at 18:40:45 Go here and scroll down a bit. Your unit should offer something comparable: http://wbo2.com/2a0/default.htm Hubert
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Luhbo

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Re: Volts v AFR:Optimiser LCD
Reply #4 - 04/26/12 at 21:08:30

After a closer look I think that reprogramming the output to Lambda f.i. probably is not a really good idea. As the Optimiser only shows the voltage it makes no real sense to decrease the output/resolution from 0-5V to let's say 0.8 - 1.2V.
I also can remember the lines you mentioned about displaying a 'real' ARF factor, nevertheless I also couldn't find them now.

Hubert

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Mad Farquhar

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Re: Volts v AFR:Optimiser LCD
Reply #5 - 04/26/12 at 22:55:45

Yup Hubert - sort of drawn a blank in the LC1 - it has 2 analogue outputs but...
LC1 Manual excerpt:-
5.1 Analog Lambda/AFR instrument.
There are many analog lambda/AFR displays on the market. They are essentially voltmeters for a
voltage between 0 and 1 V and measure the analog voltage of a narrow band oxygen sensor.
Some are true analog instruments while others provide a LED bar. Because of the very limited
sensing range of a narrow band sensor they are essentially useless as true AFR meters. With the
LC-1, connecting these meters to the second analog output of the LC-1 allows them to be used
as true remote AFR meters, provided the LC-1 analog output is programmed to the
characteristics of the used meter. The LC-1's analog output 2 is factory programmed to provide a
linear output between 0V and 5V for an AFR of 7.35 to 22.39. Any other linear output range
between 0 and 5V can be programmed. See chapter 6.5: Programming the analog outputs for
details.
As my bike is still in bits I can't experiment but it seems a non starter unless someone knows better... Roll Eyes

The reason I asked was that voltages are fine if you do some mental arithmetic whilst on the road but afr would be a "nice to have" in my book. I must be a 'Luddite' but afr seems more, well.. visual than a voltage. I have a bit of label with volts v afr stuck on the dash to allow me to sort it out relatively easily. It's not the end of the world if it's not feasible easily.
I started to strip the bike down in January to cure the gearbox whine and slowly it has broken down into more and more component parts as I strip and clean and paint. The first time in probably almost 2 decades since Luigi put it together than some of the fasteners have been taken apart. Need to draw the line soon and start re-assembly - mind you it's cr@p weather here so not missing much just now.
Gavin

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Luhbo Full Member Offline I Like My15M! Posts: 191 Germany	Re: Volts v AFR:Optimiser LCD Reply #6 - 04/27/12 at 02:40:25 I started refurbishing a 750S probably 10 years ago - I'm glad I have another bike Have you checked chapter 6.5, btw ?
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Mad Farquhar Full Member Offline Slainthe mhath Posts: 171 Black Isle, Scotland Gender:	Re: Volts v AFR:Optimiser LCD Reply #7 - 04/27/12 at 02:52:07 6.5 ! - that's where I saw it. I'll need to get the bike rebuilt to have a play now. The trusty ST1100 Pan - armchair stuff compared to guzzi grin - is available for taking out for a bimble should the weather allow.
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raz

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Re: Volts v AFR:Optimiser LCD
Reply #8 - 04/27/12 at 07:42:50

I run for a year or more with AFR shown. Very easy. Sometimes I think the reduction in resolution is actually a good thing. But last year I just used LC-1 defaults and now I don't even have an Optimiser anymore (or did I buy a new one? Can't remember).

From the very first post of the "mega thread" on v11lemans.com:
To read actual lambda or AFR values in the Optimiser display, you have two choices: either set your sensor to output voltage=lambda (eg. 0.87 volts means Lambda 0.87) or set it to voltage=AFR-10 (eg. 2.74 volts means AFR 12.74). Both has drawbacks compared to the LC-1 default: using voltage=lambda, you don't use much of the possible resolution (on the other hand, this results in some damping that may be of benefit). Using V=AFR-10, you can't read richer than 10:1 or leaner than 15:1. That range should be enough though, and you use all available resolution. I've tried both, but currently I just go with the LC-1 defaults.

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Mad Farquhar

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Re: Volts v AFR:Optimiser LCD
Reply #9 - 04/27/12 at 14:46:22

Thanks Raz - you have put me out of my misery - as usual. I knew I had read something, somewhere, about optimiser afr display but couldn't remember where. I did look at the V11 forum and even tried a forum search! Completely missed it for some reason - paint fumes? Cheesy

There is some really good stuff on that mega-thread which new users (& older ones Roll Eyes

) could be pointed at.

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