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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Air Fuel Gauge 02 Sensor Lambda Sensor
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<blockquote data-quote="Magnetoman" data-source="post: 106589" data-attributes="member: 2806"><p>That's an interesting point. I suppose in most cases when you look at a watch you just want a rough idea of the time. However, in most case when you look at the speedometer it's because you want a binary answer. For example, you've just passed a speed limit sign that says 55 and you see a police car. At that point you only care if the number on your speedometer is greater or less than 55. That's something you can process "instantly" without having to compute averages of a string of numbers. Or, even if you don't see a police car, you want to know if you're going "significantly" faster than 55 (obviously, you <em>always</em> will be going too fast, you just don't want to be too far out of line with the limit). </p><p></p><p>The A/F meter is different in that you would like as much information from it at all times as possible, and it changes much more rapidly than the speedometer does even if you plant your foot on the accelerator or brake. Under circumstances like this, analog is better. Or, at least, I think so.</p><p>My LM-1 acquires data at 12 Hz and the settings for the analog output are 'instant', 1/12", 1/6" and 1/3". The 'instant' setting implies that the intrinsic response time of the Bosch sensor and/or LM-1 unit itself is faster than 1/12" but the specifications aren't listed. The digital display refreshes every 1/4" without a way I can see of slowing that down. </p><p></p><p>There's a limit on how rapid the information can change before it's useless when watched real time. Maybe a time constant of 1" or so would be good. But, imagine burbling along at 25 mph, barely off the idle circuit of the carburetor, then accelerating to 35 to pass someone, and back to 25. To do this a rider grabs a reasonable amount of throttle, so the slide cutaway comes into play for at least part of this, so to know whether the mixture was correct during this "transient" requires data with a resolution more like 1/10". Again, absent data logging, I think analog would be better here. It would be quite helpful just to see if the needle swung toward rich or lean under these circumstances even if things happened too fast to get an actual reading. Yes, a digital display would "swing" one way or the other as well, but it's just harder to assimilate that information. At least, in my experience.</p></blockquote><p></p>
[QUOTE="Magnetoman, post: 106589, member: 2806"] That's an interesting point. I suppose in most cases when you look at a watch you just want a rough idea of the time. However, in most case when you look at the speedometer it's because you want a binary answer. For example, you've just passed a speed limit sign that says 55 and you see a police car. At that point you only care if the number on your speedometer is greater or less than 55. That's something you can process "instantly" without having to compute averages of a string of numbers. Or, even if you don't see a police car, you want to know if you're going "significantly" faster than 55 (obviously, you [I]always[/I] will be going too fast, you just don't want to be too far out of line with the limit). The A/F meter is different in that you would like as much information from it at all times as possible, and it changes much more rapidly than the speedometer does even if you plant your foot on the accelerator or brake. Under circumstances like this, analog is better. Or, at least, I think so. My LM-1 acquires data at 12 Hz and the settings for the analog output are 'instant', 1/12", 1/6" and 1/3". The 'instant' setting implies that the intrinsic response time of the Bosch sensor and/or LM-1 unit itself is faster than 1/12" but the specifications aren't listed. The digital display refreshes every 1/4" without a way I can see of slowing that down. There's a limit on how rapid the information can change before it's useless when watched real time. Maybe a time constant of 1" or so would be good. But, imagine burbling along at 25 mph, barely off the idle circuit of the carburetor, then accelerating to 35 to pass someone, and back to 25. To do this a rider grabs a reasonable amount of throttle, so the slide cutaway comes into play for at least part of this, so to know whether the mixture was correct during this "transient" requires data with a resolution more like 1/10". Again, absent data logging, I think analog would be better here. It would be quite helpful just to see if the needle swung toward rich or lean under these circumstances even if things happened too fast to get an actual reading. Yes, a digital display would "swing" one way or the other as well, but it's just harder to assimilate that information. At least, in my experience. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Air Fuel Gauge 02 Sensor Lambda Sensor
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