Pellet Fan

Please login or register.

Login with username, password and session length
Advanced search  

News:

Welcome to Pellet Fan!

Pages: [1]   Go Down

Author Topic: Temperature Difference RTD Probe & Dome Thermometer  (Read 365 times)

0 Members and 1 Guest are viewing this topic.

FredSG

  • Lurker
  • Offline Offline
  • Posts: 4
Temperature Difference RTD Probe & Dome Thermometer
« on: October 22, 2017, 01:55:18 PM »

Hello All,

The Traeger RTD Probe has  a higher temperature reading than my dome thermometer when cooking.  How do you interpret the difference?  Which temperature reading is the most accurate?  Any thoughts!

FredSG
Logged

Bar-B-Lew

  • Friends Want you to cook way to much.
  • ******
  • Online Online
  • Posts: 1263
  • Schnecksville, PA
    • Bar-B-Lews Blog
Re: Temperature Difference RTD Probe & Dome Thermometer
« Reply #1 on: October 22, 2017, 02:06:26 PM »

Scrap both of them and use a grill temp probe that goes through a clip on the grate.  Then you will know your true grate temp and can adjust your controller appropriately to get to the grate temp you desire.
Logged
MAK 2*, Memphis Elite, Traeger XL, Blaz'n Grand Slam, Weber Spirit, Camp Chef Flat Top Grill 600

hughver

  • Starting to taste the Smoke.
  • ***
  • Offline Offline
  • Posts: 227
  • Summer Home
Re: Temperature Difference RTD Probe & Dome Thermometer
« Reply #2 on: October 22, 2017, 02:36:56 PM »

I agree with Bar-B-Lew, however, on my Traeger Select, the dome thermometer (that I installed) tracks almost exactly to the pit RTD which tracks closely to the Tappeque grill thermometer.  ???
Logged
Hugh
Traeger Select, GMG DC, BGE-L, Charbroil Inferred Gas, Smokey Mountain Vertical Gas

FredSG

  • Lurker
  • Offline Offline
  • Posts: 4
Re: Temperature Difference RTD Probe & Dome Thermometer
« Reply #3 on: October 22, 2017, 02:52:37 PM »

Thanks guys,

I have a 1993 Traeger BBQ 100 - it's pretty old and I have done multiple upgrades.  My wife was concerned about the temperature difference . . .  Hughver, what DOME THERMOMETER DID YOU INSTALL?

Thanks again for your replies.

FredSG
Logged

Jcorwin818

  • Starting to taste the Smoke.
  • ***
  • Online Online
  • Posts: 180
  • 10th SFG (Lenexa, Ks)
Re: Temperature Difference RTD Probe & Dome Thermometer
« Reply #4 on: October 22, 2017, 03:27:12 PM »

I agree with Bar-B-Lew.  After ten years of cooking on my 075 Texas and monitoring my grate temp I know what to set my controller to to get the grate temp I want.
Logged
Traeger 075 Texas (USA)
WSM
22" Weber Kettle
Weber Spirit 310

hughver

  • Starting to taste the Smoke.
  • ***
  • Offline Offline
  • Posts: 227
  • Summer Home
Re: Temperature Difference RTD Probe & Dome Thermometer
« Reply #5 on: October 22, 2017, 03:56:03 PM »

Hughver, what DOME THERMOMETER DID YOU INSTALL?

I installed these in both the DC and the Select. https://www.amazon.com/gp/product/B008N4AFI2/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1
Logged
Hugh
Traeger Select, GMG DC, BGE-L, Charbroil Inferred Gas, Smokey Mountain Vertical Gas

Canadian John

  • Thinkin about Renouncing Charcoal.
  • *****
  • Offline Offline
  • Posts: 698
Re: Temperature Difference RTD Probe & Dome Thermometer
« Reply #6 on: October 23, 2017, 10:54:00 AM »

 The RTD is more accurate than the dome thermometer due to its location and being electronic. The controller is driven by RTD input.  At times the slower to react (mechanical) dome thermometer can read almost the same as the controller display. The pit must
"stabilize" for this to happen.

 The dome thermometer is a carryover from the days of the L/M/H or 3 speed controller..It was the only way short of installing a temporary grid thermometer to know what the pit temperatures were..That makes it a redundant device in todays world.

 If you continue to monitor the controller readout and the dome thermometer a pattern will develop indicating the more stable the pit temp is the narrower the gap between the two readings..

 In the end depend on the controller readout..
Logged
Happy Cooking,Canadian John

ScottWood

  • Using less gas.
  • **
  • Offline Offline
  • Posts: 74
Re: Temperature Difference RTD Probe & Dome Thermometer
« Reply #7 on: January 22, 2018, 12:37:17 PM »

After a few years of cooking on pellet cookers I have discovered that if I let the "gunk" build up on the RTD probes my pits seem to run hotter and hotter than I would like.  I attribute it to the build up not he probes causing them to not be as accurate as they should be and the controller trying to make up for it.

I keep an old school oven thermometer on the grates of my cookers and have gotten in the habit of cleaning the RTD probes before each cook. 
Logged
Homemade pellet fired UDS with Smoke Daddy Hopper
Traeger Texas Elite (the big one)
Traeger Lil' Texas Pro (the small one)
Original PK Grill when I get the urge to use charcoal

BMerrill

  • Knows what a Pellet Is.
  • *
  • Offline Offline
  • Posts: 16
Re: Temperature Difference RTD Probe & Dome Thermometer
« Reply #8 on: January 29, 2018, 12:10:24 PM »

The dome thermometer is a fancy hood ornament.
It only matches the RTD when the grill is cold... and maybe every once in a while when cooking.
 
Logged

makgrills

  • Knows what a Pellet Is.
  • *
  • Offline Offline
  • Posts: 17
Re: Temperature Difference RTD Probe & Dome Thermometer
« Reply #9 on: February 08, 2018, 06:13:34 PM »

The RTD is more accurate than the dome thermometer due to its location and being electronic. The controller is driven by RTD input. At times the slower to react (mechanical) dome thermometer can read almost the same as the controller display. The pit must
"stabilize" for this to happen.

Canadian John---Traeger's work on a TIMED AUGER basis. The RTD ONLY measures the cooking chamber temperature and has nothing to do with temperature control in the grill. I should know... I worked for Traeger for 10 years, and cooked on them for 17 years.
Logged

hughver

  • Starting to taste the Smoke.
  • ***
  • Offline Offline
  • Posts: 227
  • Summer Home
Re: Temperature Difference RTD Probe & Dome Thermometer
« Reply #10 on: February 08, 2018, 08:07:28 PM »

The RTD ONLY measures the cooking chamber temperature and has nothing to do with temperature control in the grill.

What input does the controller use to adjust pellet feed?
Logged
Hugh
Traeger Select, GMG DC, BGE-L, Charbroil Inferred Gas, Smokey Mountain Vertical Gas

dshaffes

  • Knows what a Pellet Is.
  • *
  • Offline Offline
  • Posts: 21
Re: Temperature Difference RTD Probe & Dome Thermometer
« Reply #11 on: February 08, 2018, 09:22:01 PM »

How many degrees are two temps?
Logged
Pages: [1]   Go Up