[Gmecm] Heated O2 Current Draw

[Joe Vitek]

Well, the original question in the particular thread below was:

>  Does anyone know the current draw for the heater circuit on a heated
>  O2 sensor?
> 
> I need to convert to a heated sensor.

I was just pointing out that a meter at room temp would be inaccurate for
continuous current usage. I know about the positive temp coeff. w.r.t.
resistance. I just assumed everyone else understood that and just forgot or
something. Maybe I came into the thread late and missed the fuse thing back
after the original question above but before I opened my trap.

Sorry.

--
joe

William Lucke wrote:
> 
> As was pointed out before, the current draw will be greatest on a cold
> heater. This is simple physics and I'm surprised no one has brought this
> up yet... As the temperature of the element goes up, its resistance will
> go up as well. The least resistance and greatest current draw will be
> when the element is cold. Measuring at room temp is in fact MUCH BETTER
> than measuring resistance hot.
> 
> Will
> 
> > From: "Scott Pearson" <mrcad472 at iowatelecom.net>
> > Subject: Re: [Gmecm] Heated O2 Current Draw
> > To: <gmecm at diy-efi.org>
> > Message-ID: <04b901c642c3$d80e2760$6601a8c0 at DELL3G>
> >
> > If you're asking to find out what size of fuse to use, just find out what
> > car used that sensor and use that fuse size.
> >
> > For instance, I just looked up a 2001 Bonneville 3800 SC. Uses two heated
> > sensors (B1S1 and B1S2). The heaters for both sensors are powered by one 10A
> > fuse, powered when the ignition is in the ON and START postitions.
> >
> > Scott
> >
> > ----- Original Message -----
> > From: "Programmer" <lwester at lincsat.com>
> > To: <gmecm at diy-efi.org>
> > Sent: Wednesday, March 08, 2006 8:42 AM
> > Subject: Re: [Gmecm] Heated O2 Current Draw
> >
> >
> >> Accurate enough to determine what fuse to use...good grief !
> >>
> >> Lyndon.
> >>
> >> ----- Original Message -----
> >> From: "Joe Vitek" <joevitek at cfl.rr.com>
> >> To: <gmecm at diy-efi.org>
> >> Sent: Tuesday, March 07, 2006 11:40 AM
> >> Subject: RE: [Gmecm] Heated O2 Current Draw
> >>
> >>
> >>> The resistance of the heater element changes with temperature. A meter
> >>> will not give you
> >>> an accurate reading...
> >>>
> >>>> -----Original Message-----
> >>>> From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On
> >>>> Behalf Of
> >>>> Programmer
> >>>> Sent: Tuesday, March 07, 2006 1:38 PM
> >>>> To: gmecm at diy-efi.org
> >>>> Subject: Re: [Gmecm] Heated O2 Current Draw
> >>>>
> >>>> Ohms law E=IxR ...do the math. Measure the resistance of the heater
> >>>> circuit...
> >>>> It's a 12-14.5 volt system
> >>>> Doesn't take a big draw...
> >>>>
> >>>> Lyndon.
> >>>>
> >>>> ----- Original Message -----
> >>>> From: "Mike Poore" <mp at flowersbyvalerie.com>
> >>>> To: <gmecm at diy-efi.org>
> >>>> Sent: Tuesday, March 07, 2006 9:23 AM
> >>>> Subject: [Gmecm] Heated O2 Current Draw
> >>>>
> >>>>
> >>>>> Does anyone know the current draw for the heater circuit on a heated
> >>>>> O2
> >>>>> sensor?
> >>>>>
> >>>>> I need to convert to a heated sensor.
> >>>>>
> >>>>> Mike
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> Gmecm at diy-efi.org
> http://lists.diy-efi.org/mailman/listinfo/gmecm

--
joe vitek (on the shores of the Indian River, Cocoa, Florida)
http://mywebpages.comcast.net/joevitek/Motorized_Projects/projects.htm
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