Discussion in 'ScanGauge' started by Dan, Aug 25, 2007.
It does for me. It saves the offset, but doesn't reset the tank.
One strategy I'd suggest is to either leave it uncalibrated for the first tank or so, or to simply stay one tank behind the worksheet as I suggested in the previous post.
For example. I fill up on the 12th of every month. So on January 12th I fill up and leave the gauge uncalibrated ("0.0" for fuel; "0.0" for speed). On January 13th I enter the numbers into the spread sheet then print the spreadsheet. I keep the printout in my car. On February 12th I fill up but this time I pull out the printout from my glove box. I use the fuel and speed adjustments I worked out back in January. On February 13th I go home and enter the February tank into the spreadsheet and use the data to come up with a new calibration number. I print the spreadsheet and put it in my glove box to use for the March tank.
The spreadsheet is intended to zero in on the best figure over time. The more tanks you put in, the closer your calibrations should get you to actual.
I'm trying to download the SGcalibration.zip spreadsheet. I have saved it to my hard drive, but when I try to open it, I get an error "invalid archive format". Is the file on the cleanmpg server corrupted, or am I doing something wrong? Can someone please verify?
Nice work, Dan!
I installed my new SG2 a week ago.
I found this nice calibration worksheet, yesterday.
Today it'll be 2nd Fuel fill up and calibration day.
There's one thing, that I don't understand, though...
What's the point of using my car's trip ODOmeter (which for sure ain't accurate) in the calibration worksheet?
I thought Speed calibration was a "set and forget" thing.
I adjusted the SG2 against my GPS the very first day, so the SG2 should be rather accurate.
Hey, congrats on the SG. You'll love it.
The point of the worksheet is to calibrate a "known good" distance measurement and a "known good" fuel use measurement against SGII's "speed" (distance really) and SGII's "gallons" (fuel use). With that being said, what you use for your "known goods" is completely up to you.
I like having my SGII synced to my car's FCD simply for consistency and the "gaming" of it all. A purist approach would be to study your car and figure out how far from "actual" your ODO reads and calibrate to that (Trip_ODO + Caluclated_Delta). I know many people who prefer to do it this way.
Good luck and let us know how it goes.
You have to excuse me for being slow...
Doesn't that mean that you actually "copy" the inaccuracy from your Car's trip ODO to the SGII, instead of calibrating SGII for Accuracy...???
That's what I do. I adjust the SG to match my odo. The main reason is I don't want to have to do conversions all the time. It's close enough, within a couple percent of reality.
The calibration changes slightly as your tires wear down, on the order of 1 or 2 percent.
Well as my professor used to say, "All measurements are inaccurate, the art of it is to know by how much". So using that model, the calibration allows you to copy whatever inaccuracy you prefer. You can copy the inaccuracy of your ODO, you can copy the inaccuracy of your GPS, or you can copy the inaccuracy of your favorite mapping program. The goal is simply to reduce the level of inaccuracy. My SG is optimistic on distance by > 1%. My car is optimistic on distance by < 1%. Even though my ODO is inaccurate, it is LESS inaccurate. Which source you use is completely up to you.
I use my ODO since that is "fair" (again... Dan=gamer). So If I call out that I got 103 MPG calibrated to my ODO, that is a "fair" claim. If I call it out calibrated to my FCD, that is also "fair", but FCDs are getting pretty close to the line now days.
I've tried to download the calibration worksheet without success. I keep getting a mesage that the file is corrupt. Is there a way you can look into it so that it may be downloaded?
Just tried without error...
Anyone else having problems?
I just downloaded it with no problem but didn't unzip it.
STEP 1: "Look on your ScanGauge and record your current calibration settings. These are found in the SPEED screen and the FILLUP screen. Remember to put in the plus (+) or minus (-) sign for these numbers."
I guess I'll just read the value from the fillup menu (the value I used for my last tank). Then the adjustment for fillup should be taken from the blue cells in STEP 3, right?
I can download file but it will not unzip. Message received is:
CANNOT OPEN FILE: IT DOES NOT APPEAR TO BE A VALID ARCHIVE.
Normally that'll be a corrupt download.
Delete it, download it again.
If still no joy, suggest defragging / checking disk / opening in a different application, like Openoffice Calc.
I have a different but related problem. I have a Hymotion pack and a tank of gas would last me about a year. So, I've been filling up with only 10 litres of gas which lasts me almost a month.
Telling my SG that I just filled up with 10 litres completely desimates my calibration. How do you suggest that I enter a partial "fillup"?
So what adjustment do I need to do with this data. I already have my tank size set to 12.5 gallons (2006 HCH-II)
Thanks for your assistance!
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