X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 01 Jan 2008 15:49:33 -0500 Message-ID: X-Original-Return-Path: Received: from imo-m28.mx.aol.com ([64.12.137.9] verified) by logan.com (CommuniGate Pro SMTP 5.2c4) with ESMTP id 2626306 for lml@lancaironline.net; Mon, 31 Dec 2007 16:40:10 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.9; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-m28.mx.aol.com (mail_out_v38_r9.3.) id q.c87.1ff3b50f (65097) for ; Mon, 31 Dec 2007 16:39:16 -0500 (EST) From: Sky2high@aol.com X-Original-Message-ID: X-Original-Date: Mon, 31 Dec 2007 16:39:15 EST Subject: Re: [LML] VM1000 problems at low voltage X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1199137155" X-Mailer: AOL 9.0 VR sub 5006 X-Spam-Flag: NO -------------------------------1199137155 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 12/31/2007 1:40:03 P.M. Central Standard Time, stockmos@algonet.se writes: I have found out that below 13 volt the VM1000 stops working. When speaking to the support people at Vision I have been told that the VM1000 should work down to 9 volt. I have tried to get a hint what to do from this support people but they are not so interested in my problems. Even when asking where to send it to get it fixed have not resulted in an answer. Has anyone out there had a similar problem and are villing to give me a hint how to fix it. I have been asking the Vision company for a schematic but they refuse to give it to a user. I have some experience in repairing electronic equipment and I should appreciate very much if anyone could give me an advice how to fix this problem. Christer, Can you independently (non-VM) measure the bus voltage that is supplied to the VM instrument? I.E. a separate voltmeter on the supply line. I have older 12VDC VM equipment (EPI 800) that definitely restarts after the voltage dips below 9 VDC, although this only happens at engine start. If your VM is on an "essential bus", separated from the main bus by an isolation diode, then that essential bus will be operating at a lower voltage than the main bus. Depending on the load carried by the essential bus, the voltage drop can be significant and it should be monitored. Another possibility is poor grounding for the VM. Scott Krueger AKA Grayhawk Lancair N92EX IO320 SB 89/96 Aurora, IL (KARR) Darwinian culling phrase: Watch This! **************************************See AOL's top rated recipes (http://food.aol.com/top-rated-recipes?NCID=aoltop00030000000004) -------------------------------1199137155 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
In a message dated 12/31/2007 1:40:03 P.M. Central Standard Time,=20 stockmos@algonet.se writes:
<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>
I have found out that below 13 volt=20= the=20 VM1000 stops working. When speaking to the support pe= ople=20 at Vision I have been told that the  VM1000  should work do= wn=20 to 9 volt. I have tried to get a hint what to do from this support people=20= but=20 they are not so interested in my problems. Even when asking where to send=20= it=20 to get it fixed have not resulted in an answer. Has anyone out there had a similar problem and=20= are=20 villing to give me a hint how to fix it. I have been asking the Vision com= pany=20 for a schematic but they refuse to give it to a user. I have some experien= ce=20 in repairing  electronic equipment and I should appreciate very much i= f=20 anyone could give me an=20 advice how to fix this=20 problem.
Christer,
 
Can you independently (non-VM) measure the bus voltage that is supplied= to=20 the VM instrument? I.E. a separate voltmeter on the supply line.
 
I have older 12VDC VM equipment (EPI 800) that definitely restarts= =20 after the voltage dips below 9 VDC, although this only happens at engin= e=20 start.
 
If your VM is on an "essential bus", separated from the main bus b= y an=20 isolation diode, then that essential bus will be operating at a lower voltag= e=20 than the main bus.  Depending on the load carried by the essential bus,= the=20 voltage drop can be significant and it should be monitored.
 
Another possibility is poor grounding for the VM.
 
Scott Krueger=20 AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL=20 (KARR)

Darwinian culling phrase: Watch=20 This!



See AOL's top rated recipes and e= asy ways to stay in shape for winter.
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