[Gmecm] Heated O2 Current Draw

[William Lucke]

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