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Lowrance LMF- 200 - JOKE!

Old 04-27-2007, 11:35 AM
  #1  
jlr
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Default Lowrance LMF- 200 - JOKE!

This is perhaps the single worst POS I have every installed on any boat in 40 years. The book is unintelligible and I am now (and have been ) on hold with tech support for two hours. Lowrance--never again!.
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Old 04-27-2007, 11:45 AM
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Default Re: Lowrance LMF- 200 - JOKE!

I partially agree:

The instruction manaul is TERRIBLE.
Tech support at Lowrance is even worse than terrible - the hold times and uneducated service reps are an insult.

BUT, the unit itself is actually a pretty neat thing. Give it a shot and don't throw the baby out with the bath water.
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Old 04-27-2007, 12:03 PM
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jlr
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Default Re: Lowrance LMF- 200 - JOKE!

I am using an e-15 sensor to measure fuel remaining in my tank not the e-10 flow sensor. With that said, when the gauge read 209 gallons remaining I actually had only 150 gallons remaining. No big deal so I call up and try to speak to a tech about calibrating to remove the error. Can't get through after two hours so I hung up. The book is horrible--I guess 4 years of college and 3 years of law school does not qualify me to read and understand the English language. I know that it can be adjusted and calibrated when using the flow sensor. Does ANYONE know whether I can adjust and calibrate when using the e-15 sensor simply to more accurately determine how much fuel is left in the tank? I know that the initial accuracy is just a function of the sender on the tank. I was hoping that by adjusting the e-15, it could more accurately convert the electrical signal form the sender to the digital accurate readout from the gauge.
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Old 04-27-2007, 01:06 PM
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Default Re: Lowrance LMF- 200 - JOKE!

1st, you have to tell the LMF-200 that the ep-15 is measuring fuel. Its on page 39 of the manual.

2nd, you can calibrate the sensor for 2, 3 or 5 points. The more points you use, the more accurate. Especially with a tank that is not perfectly rectangular. The calibration starts on page 51 of the manual.

Part of the problem is the LMF gauges do so much that there are many ways (and menu pages) to tune them. I don't find the manual to be that bad, but you HAVE to carefully do each step in order for it to all work out correctly.

Hope this helps.

Ken
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Old 04-27-2007, 01:16 PM
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jlr
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Default Re: Lowrance LMF- 200 - JOKE!

Ken - thanks for the help. I have tried to do that with my rectangular tank. Funny thing though--in the ideal world, one would start off with the tank empty, then, in 20% increments, keep setting the gauge. Real world--I have the tank full and have no intention of running it dry for the sake of the LMF-200 system of calibration. With that said, and after telling the gauge that my now full tank holds 530 gallons, how the heck do I work the other way (ie. know when it is down 20% or for that mater, down 50%). This is by no means an attack on your kind suggestions--just a rather practical swat at Lowrance and their AS- backward way of doing things. For what it's worth, the first tech I did speak to before holding on for another two hours had no idea how to accomplish what I wanted--simply put-- obtain a reasonably accurate idea of the amount of fuel remaining in my tank. Because I have diesels, a flow sensor was out of the question--at least from Lowrance. I might actually swing for the 2-3K and install Flo Scans if I can't get the Lowrance unit to be closer than 25%. Heck, I could estimate that without the gauge.
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Old 04-27-2007, 02:22 PM
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Default Re: Lowrance LMF- 200 - JOKE!


Thanks. I *am* just trying to help. 25% is indeed pretty bad, its like glancing at the side - or worse. You know, the ep-15 won't give you fuel used, it really is only an electronic way to get a fuel gauge onto the LMF-200.

Ok lets see... You can't use a simple fuel flow meter to get fuel used because you have diesel that recirculates some fuel. Lowrance doesn't make the special kind of flow meter you'd need to measure fuel used accurately.

If the fuel level is way off and its impractical to empty the tank (pretty likely with a big tank), you can do one of 2 things. You could reset to factory settings which should be close to normal analog gauge accuracy. Or you can try the 'full' point of a 2 point calibration.

In all fairness to the LMF-200, its electronically measuring the level in the tank. It needs someway to know what the signal its seeing equates to in real fuel level. I wonder if you can somehow enter a "fudge factor"? You know, if it says its at 3/4 when the tank is really at 1/2, tell it that it is at 1/2 ! Keep in mind that you can do a single point on the 2, 3 or 5 point calibration, you never have to do all the points.

Ken
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Old 04-27-2007, 03:47 PM
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Default Re: Lowrance LMF- 200 - JOKE!

If you have a rectangular tank you use the 2 point calibration. Just remove the sender from the tank, hook it up and move the float to the full point and empty point to calibrate as per the instructions. Make sure the distance from the EP15 to the backbone is not more than 20'
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