Page 2 of 2 FirstFirst 12
Results 11 to 13 of 13

Thread: Voltmeter

  1. 24th February 2012, 05:35 AM #11
    Blknight.aus's Avatar
    Blknight.aus
    Blknight.aus is offline RoverLord Vendor
    Join Date
    Aug 2006
    Location
    Melbourn(ish)
    Posts
    26,497
    Total Downloaded
    0
    not really because you then hit the problem of if the alternators being a touch lazy the DBS can back feed amps into the system at times of high demand which might mask the beginnings of failure of the alternator.
    Dave

    "In a Landrover the other vehicle is your crumple zone."

    For spelling call Rogets, for mechanicing call me.

    Fozzy, 2.25D SIII Ex DCA Ute
    Tdi autoManual d1 (gave it to the Mupion)
    Archaeoptersix 1990 6x6 dual cab(This things staying)


    If you've benefited from one or more of my posts please remember, your taxes paid for my skill sets, I'm just trying to make sure you get your monies worth.
    If you think you're in front on the deal, pay it forwards.
    Reply With Quote Reply With Quote
  2. 24th February 2012, 07:21 AM #12
    drivesafe's Avatar
    drivesafe
    drivesafe is offline OldBushie Vendor
    Join Date
    Jan 1970
    Location
    Queensland
    Posts
    7,904
    Total Downloaded
    0
    Quote Originally Posted by DeanoH View Post
    Modern digital voltmeters give a very accurate reading to either 1/10th or 1/100th of a volt and give a very good indication of whether the battery is charging or not.
    Hi DeanoH and volt meters do not tell you if the battery is charging.

    This is one of the biggest misconceptions about volt meters, once the motor is running, all they will do is indicate that the alternator is working.

    Having a decent alternator voltage reading does not indicate a battery is charging. The battery could be totally stuffed and not drawing any current at all, yet a volt meter will show there is a charging voltage at the battery, it's just not charging.

    Amp meters can be very useful in telling you your battery is not charging but again, it indicates that there is already a problem.

    The only way you can get advanced info of a battery being on the brink of failing is with a full battery monitoring system, which are expensive ( starting at 4$00 to $500 before fitting cost ) and unrealistic for the average 4x4 use.

    For Land Rover Specific Dual Battery Systems and Headlight Wiring Upgrade Kits,
    Reply With Quote Reply With Quote
  3. 24th February 2012, 10:30 AM #13
    DeanoH
    DeanoH is offline ChatterBox Subscriber
    Join Date
    May 2009
    Location
    West Gippsland - Victoria
    Posts
    2,907
    Total Downloaded
    0
    Quote Originally Posted by drivesafe View Post
    Having a decent alternator voltage reading does not indicate a battery is charging. The battery could be totally stuffed and not drawing any current at all, yet a volt meter will show there is a charging voltage at the battery, it's just not charging.
    You are of course quite correct.

    In context my statement was refering to indication of alternator failure/output degradation and its effect on battery voltage, as opposed to physical condition of the battery itself.
    In this scenario (alternator failure/low output) battery voltage would drop as it became discharged. With digital voltmeters small changes in voltage are easier to notice than with an analog meter so action can be taken earlier was the point I was making.

    Thanks Deano
    Reply With Quote Reply With Quote
Page 2 of 2 FirstFirst 12
« IPHONE 4S INVALID POSTCODE, ANYONE FIXED THIS? | UHF antenna's ??? »

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Forum Rules

Search AULRO.com ONLY!
 Search All the Web!