BRADLEY SMOKER | "Taste the Great Outdoors"

Bradley Smokers => The Digital Smokers (BTDS76P & BTDS108P) => Topic started by: Overholtm on January 09, 2010, 05:17:06 PM

Title: PID showing different Temp than BDS
Post by: Overholtm on January 09, 2010, 05:17:06 PM
Just installed my new Auber Programmable PID.  Fired up the BDS to preheat, the Auber shows 250 degrees, the BDS shows 225.  Both holding steady.  I permanently installed the Auber temp probe 3/8" under the top rack as instructed.

My question is:  Could the BDS be that far off?  Do I need to find and clean the sensor for the BDS?

The reason I bought the PID is that lately I could never get the Smoker up to temp, while at the same time meats tended to be getting dried out.

With the PID, maybe it doesn't matter anymore, but would be curious as to the reason for the difference in readings.

Title: Re: PID showing different Temp than BDS
Post by: KyNola on January 09, 2010, 05:19:02 PM
The BDS could most certainly be that far off.  Just so you know, the sensor for the BDS is a flat disk on the back wall at about the second rack up from the bottom.

KyNola
Title: Re: PID showing different Temp than BDS
Post by: Overholtm on January 09, 2010, 05:30:51 PM
I'll go clean it now and see if it makes a difference on the reading.

Thanks
Title: Re: PID showing different Temp than BDS
Post by: KyNola on January 09, 2010, 06:23:01 PM
The BDS is famous for the temp readings being off, particularly in the early stages of a smoke/cook.  That's why many of us monitor the tower temp with a Maverick ET-73.  If you have auto tuned your Auber, I would trust it's temp reading.

KyNola
Title: Re: PID showing different Temp than BDS
Post by: Overholtm on January 09, 2010, 06:29:10 PM
Quote from: KyNola on January 09, 2010, 06:23:01 PM
The BDS is famous for the temp readings being off, particularly in the early stages of a smoke/cook.  That's why many of us monitor the tower temp with a Maverick ET-73.  If you have auto tuned your Auber, I would trust it's temp reading.

KyNola

Auto tune?  Mine didn't come with any instructions. 
Title: Re: PID showing different Temp than BDS
Post by: KyNola on January 09, 2010, 06:31:28 PM
Man, I'm sorry I can't help you with that but there are several guys who will come along or do a search on the forum as I'm pretty sure you have to do some sort of "tuning" to the Auber.

If I'm wrong I totally apologize.
Title: Re: PID showing different Temp than BDS
Post by: HawkeyeSmokes on January 09, 2010, 06:32:36 PM
Quote from: Overholtm on January 09, 2010, 06:29:10 PM
Quote from: KyNola on January 09, 2010, 06:23:01 PM
The BDS is famous for the temp readings being off, particularly in the early stages of a smoke/cook.  That's why many of us monitor the tower temp with a Maverick ET-73.  If you have auto tuned your Auber, I would trust it's temp reading.

KyNola

Auto tune?  Mine didn't come with any instructions. 

What model do you have? If it's the WS-1200CPH I can email the directions to you.
Title: Re: PID showing different Temp than BDS
Post by: KyNola on January 09, 2010, 06:34:49 PM
Help is on the way!

Thanks Hawkeye.  NePaS should be along shortly too.
Title: Re: PID showing different Temp than BDS
Post by: Overholtm on January 09, 2010, 06:37:18 PM
Yes I have the WS-1200CPH.  Please email me the instructions.

Thanks
Title: Re: PID showing different Temp than BDS
Post by: HawkeyeSmokes on January 09, 2010, 06:45:34 PM
Quote from: Overholtm on January 09, 2010, 06:37:18 PM
Yes I have the WS-1200CPH.  Please email me the instructions.

Thanks

PM me your email addy and I will send it over.
Title: Re: PID showing different Temp than BDS
Post by: NePaSmoKer on January 09, 2010, 07:26:54 PM
Your going to find that there will be a temp difference between the smoke gen and the PID. Mine is around a 15* difference. Trust your PID readings.
Is yours the programmable PID?
Title: Re: PID showing different Temp than BDS
Post by: Overholtm on January 09, 2010, 07:45:06 PM
Quote from: NePaSmoKer on January 09, 2010, 07:26:54 PM
Your going to find that there will be a temp difference between the smoke gen and the PID. Mine is around a 15* difference. Trust your PID readings.
Is yours the programmable PID?

Yes, I have the programmable. 

Playing with programming it so that it will pre-heat at 4am.  (Let me sleep a little longer)  I read that below 32 degrees there is an issue with it not running correctly.  So if I set it the 1st program to start at 10PM for 6hrs and a temp of 50 degrees, then the 2nd program for 2 hrs at 250, by 6 am I should be preheated and ready for the turkey.

I'll let you know how it works.
Title: Re: PID showing different Temp than BDS
Post by: pensrock on January 09, 2010, 07:49:48 PM
If the temperature is holding fairly steady, +-2 or 3 degrees F with a load in the smoker, you may not need to do an Autotune.
I never understood why Auber has the probe placed so high in the tower, I do not have an Auber but I put my thermocouple just below the second rack. About the middle of the tower, where I do most of my cooking.
Title: Re: PID showing different Temp than BDS
Post by: classicrockgriller on January 09, 2010, 08:02:10 PM
Overholtm, welcome to the forum.

How long you had your BDS?
Title: Re: PID showing different Temp than BDS
Post by: Overholtm on January 09, 2010, 09:16:21 PM
Quote from: classicrockgriller on January 09, 2010, 08:02:10 PM
Overholtm, welcome to the forum.

How long you had your BDS?

Thanks, been reading for for a year or so.  Had the BDS for about 1 1/2 years.
Title: Re: PID showing different Temp than BDS
Post by: classicrockgriller on January 09, 2010, 09:58:20 PM
Quote from: Overholtm on January 09, 2010, 09:16:21 PM
Quote from: classicrockgriller on January 09, 2010, 08:02:10 PM
Overholtm, welcome to the forum.

How long you had your BDS?

Thanks, been reading for for a year or so.  Had the BDS for about 1 1/2 years.

OK now I understand why a "new" member would need to clean his thermo probe. You are a seasoned smoker. ;D

Hope you come back and share some of you smokes with US. And yes, We like pictures.
Title: Re: PID showing different Temp than BDS
Post by: Overholtm on January 10, 2010, 03:01:26 PM
Well, here's the test results:

With the cabinet empty, the PID would show at least 25 degrees higher that the BDS.

With a turkey in (sitting between the two sensors) the BDS would read 50 degrees higher than the PID!

Preheated to 250, Vent wide open, temp of course dropped, set the PID to 225.  Only ever got to 205, while the BDS was showing 255, and the IT is at 162 after 6 1/2 hours for a 12 lb bird.

Compared to the same smoke 2 weeks ago, this was 3 hours shorter, in fact I was not able to get the IT up in time for dinner so finished it in the oven.  That time without the PID the highest the BDS showed the temp was 205.  Now with the PID I am showing another 50 degrees.

BTW I did clean the sensor and it made no difference.

Does this sound normal, is the PID putting out that much more power to the heating element?  Is the Bradley thermometer that far off?

Dazed and confused, but the turkey looks good!
Title: Re: PID showing different Temp than BDS
Post by: pensrock on January 11, 2010, 05:38:22 AM
By placing the PID thermocouple so high in the chamber, I do think it will get hotter lower in the tower. If the PID t/c and the BDS temp probe were placed next to each other then the temp should read closer to each other.
Title: Re: PID showing different Temp than BDS
Post by: Roadking on January 11, 2010, 08:01:07 AM
Here's a link for the manual if anyone needs it:  WS-1200CPH Manual (//http://)
Title: Re: PID showing different Temp than BDS
Post by: Waltz on January 15, 2010, 01:34:59 PM
Just to back up what everyone else has pretty much said.  I noticed the approx. 25deg difference between the Auber and the BDS, with the BDS always being lower.  I checked the Auber by taping my digital thermometer probe to the Auber probe and placing both at the second top shelf location in my empty 6-rack.  The Auber and the digital thermometer agreed to within 1 or two degrees, and tracked each other like that even when the temperature was adjusted so I guess the Bradley indication should be regarded as a rough estimate.  It also makes it more unlikely that you will 'fat-out' your sausages by over heating them if you are only using the BDS indication :)

Waltz.