X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 08 Sep 2005 09:32:35 -0400 Message-ID: X-Original-Return-Path: Received: from imo-m18.mx.aol.com ([64.12.138.208] verified) by logan.com (CommuniGate Pro SMTP 5.0c2) with ESMTP id 714828 for lml@lancaironline.net; Wed, 07 Sep 2005 20:37:55 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.138.208; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-m18.mx.aol.com (mail_out_v38_r5.3.) id q.db.2d39c1bd (3866) for ; Wed, 7 Sep 2005 20:37:05 -0400 (EDT) From: Sky2high@aol.com X-Original-Message-ID: X-Original-Date: Wed, 7 Sep 2005 20:37:05 EDT Subject: Re: [LML] loads and load meters X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1126139825" X-Mailer: 9.0 Security Edition for Windows sub 5009 X-Spam-Flag: NO -------------------------------1126139825 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 9/7/2005 1:45:21 P.M. Central Standard Time, colyncase@earthlink.net writes: Can anyone explain exactly what a load meter is and how you build one? e.g. how is it different from an ammeter? Also - I haven't been able to figure out how to get continuous load value for various avionics. The only available informaiton seems to be the max load. I'm trying to size the essential bus in an informed way. Colyn, An ammeter is a sensor placed on the battery to bus supply line to determine whether energy is flowing to the battery (meter +) or flowing out (ammeter -). A hall-effect device surrounding the battery anode line can sense the current flow magnitude and direction. A similar hall-effect sensor can be placed on the alternator B-lead to sense the current magnitude (the load) flowing to the main bus, including topping off the battery. Essential bus, see _http://www.periheliondesign.com/powerschottkydiodes.htm_ (http://www.periheliondesign.com/powerschottkydiodes.htm) See his 60 amp diode with a very low voltage drop for your essential bus. He has great stuff. Scott Krueger AKA Grayhawk Lancair N92EX IO320 SB 89/96 Aurora, IL (KARR) -------------------------------1126139825 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
In a message dated 9/7/2005 1:45:21 P.M. Central Standard Time,=20 colyncase@earthlink.net writes:
<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>
Can anyone explain exactly what a load me= ter is=20 and how you build one?
e.g. how is it different from an=20 ammeter?
 
Also - I haven't been able to figure out=20= how to=20 get continuous load value for various avionics.
The only available informaiton seems to b= e the=20 max load.   I'm trying to size the
essential bus in an informed=20 way.
Colyn,
 
An ammeter is a sensor placed on the battery to bus supply line to=20 determine whether energy is flowing to the battery (meter +) or flowing out=20 (ammeter -).  A hall-effect device surrounding the battery anode line c= an=20 sense the current flow magnitude and direction.
 
A similar hall-effect sensor can be placed on the alternator B-lead&nbs= p;to=20 sense the current magnitude (the load) flowing to the main bus, including=20 topping off the battery.
 
Essential bus, see
 
http://www.= periheliondesign.com/powerschottkydiodes.htm
 
See his 60 amp diode with a very low voltage drop for your essential=20 bus.  He has great stuff.=20
 
Scott Krueger=20 AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL=20 (KARR)



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