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Lowrance LMF-400 Battery Voltage Display

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Lowrance LMF-400 Battery Voltage Display

Old 10-29-2006, 09:21 PM
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Default Lowrance LMF-400 Battery Voltage Display

I am running dual battery banks, and have a LMF-400 installed, I would like to use it to moniter battery voltage of my house battery, I have a guage for the engine battery. The Lowrancenet network is powerd by the power lead that powers the network directly (came with guage). I can watch the voltage using my fish finder fine, but sometimes don't bother turning it on for short runs in familier areas. Any ideas as to the solution for this problem?
Old 10-29-2006, 09:27 PM
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Default Re: Lowrance LMF-400 Battery Voltage Display

I use a Newmar DCE energy monitor - completely seperate and will monitior 3 diff batts all with seperate low voltage alarms - backlit red at night - google it....
Old 10-29-2006, 09:36 PM
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Default Re: Lowrance LMF-400 Battery Voltage Display

Glen E - 10/29/2006 9:27 PM

I use a Newmar DCE energy monitor - completely seperate and will monitior 3 diff batts all with seperate low voltage alarms - backlit red at night - google it....
Those things are pretty neat looking, I've only got one minor problem......out of dash space. I guess thats not all bad though, keep me from buying more toys for the boat that I don't need.
Old 10-30-2006, 01:22 AM
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Default Re: Lowrance LMF-400 Battery Voltage Display

Unlike your fishfinder, the LMF's will not monitor the voltage of the power supply it is connected to.

The LMF-200 and LMF-400 will only display voltage if the information is sent to it in NMEA2000 format.. ie from a compatible NMEA2000 outboard which sends voltage data.
Old 10-30-2006, 02:04 AM
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Default Re: Lowrance LMF-400 Battery Voltage Display

I've been using these little voltmeters and they are great. They are about 1.5" wide, they have a single threaded stud on the back so install is just drill one small hole but they look like they are mounted in-dash. Simple two wire hook-up, water resistant, easy to read, very accurate and cheap.



You can buy them here:

http://www.alliedelec.com/Search/Pro...45408029E0E17F

You can see three of them here on my cat helm. I made a custom mini panel to monitor three banks (under the right lower corner of the wheel)

Old 10-30-2006, 10:59 AM
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Default Re: Lowrance LMF-400 Battery Voltage Display

Cookiemonster - 10/30/2006 1:22 AM

Unlike your fishfinder, the LMF's will not monitor the voltage of the power supply it is connected to.

The LMF-200 and LMF-400 will only display voltage if the information is sent to it in NMEA2000 format.. ie from a compatible NMEA2000 outboard which sends voltage data.
not that it would really help me at all given what I am trying to do, but is there any way to export this information from the LMS-337DF in this format? Also, what about stuff like water temp and depth? It would be handy to export this data to the guage to clean up the screen a bit when using it strictly for navigation purposes, overlay data can get a bit cluttering at times in situations where there is a lot of detail on the chart screen.
Old 10-30-2006, 04:38 PM
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Default Re: Lowrance LMF-400 Battery Voltage Display

autobaun70 - 10/30/2006 10:59 AM
not that it would really help me at all given what I am trying to do, but is there any way to export this information from the LMS-337DF in this format?
Unfortunately no.
Old 10-30-2006, 07:22 PM
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Default Re: Lowrance LMF-400 Battery Voltage Display

Autobuan70,
With both units connected to a NMEA 2000 network you can display GPS speed, depth, temp, & position info from the LMS-337 on the LMF-400... I'm running the LCX-111 & the LMF-400 and use the LMF-400 to reduce screen clutter...

Old 10-31-2006, 09:07 AM
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Default Re: Lowrance LMF-400 Battery Voltage Display

JimmyH - 10/30/2006 7:22 PM

Autobuan70,
With both units connected to a NMEA 2000 network you can display GPS speed, depth, temp, & position info from the LMS-337 on the LMF-400... I'm running the LCX-111 & the LMF-400 and use the LMF-400 to reduce screen clutter...
How do you go about setting this up? I can get both the LMS-337DF & the LMF-400 to see everything else on the network, except each other. Is this a setting that I am missing somewhere.
Old 10-31-2006, 02:55 PM
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Default Re: Lowrance LMF-400 Battery Voltage Display

1st thing you do is to add a digital (single, dual, or quad)page on the LMF-400 (see pg 13 owners manual). Once you have added a page follow procedures on pg 33 of manual to customize the display for depth, spd, position. Send me a PM if your still having issues.

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