Do PIDS need to be temperature calibrated? - Home Brew Forums
Home Brew Forums > Home Brewing Beer > Equipment/Sanitation > Do PIDS need to be temperature calibrated?
Cool Brewing Giveaway - Supporting Membership Drive & Discount

Reply
 
Thread Tools
Old 02-19-2009, 02:47 PM   #1
JVD_X
HBT_LIFETIMESUPPORTER.png
 
JVD_X's Avatar
Recipes 
 
Jan 2008
Gainesville, Virginia
Posts: 1,467
Liked 4 Times on 4 Posts



Without falling back on a scientific thermometer how can you be sure that you are hitting the correct absolute temperatures? Does a PID/RTD combo have to be periodically calibrated?

I just finished building my Auberins SYL-2352 PID with the PT100-L50NPT RTD and it seems to be working but it occurred to me that I don't know if these have to be calibrated and there is nothing in the instructions that I can find about it.

Thanks...


__________________
- JVD_X

 
Reply With Quote
Old 02-19-2009, 03:07 PM   #2
tipicreeper
Recipes 
 
Dec 2008
Arizona
Posts: 191
Liked 2 Times on 1 Posts


Many higher end PID controllers have a calibration feature somewhere i the menu structure. Some have a 2 point system where the RTD/TC needs to be set at two known temperatures and the controller is prompted to learn those two points. Many have a single point calibration that uses 32 deg F as a base.
While looking through the manuan of your controller I can't find either of those features. My advice would be to stick the sensor in ice water & boiling water to get a feel as to where you are and adjust manually.
I think you will find it to be very close.
-David



 
Reply With Quote
Old 02-19-2009, 03:20 PM   #3
JVD_X
HBT_LIFETIMESUPPORTER.png
 
JVD_X's Avatar
Recipes 
 
Jan 2008
Gainesville, Virginia
Posts: 1,467
Liked 4 Times on 4 Posts


Cool - thanks... I am going to look to see what pids offer that feature.
__________________
- JVD_X

 
Reply With Quote
Old 02-19-2009, 03:27 PM   #4
tipicreeper
Recipes 
 
Dec 2008
Arizona
Posts: 191
Liked 2 Times on 1 Posts


The ones I am in typical contact with are Watlow SD Temperature controllers. (through my job)

 
Reply With Quote
Old 02-19-2009, 03:52 PM   #5
drez77
Recipes 
 
Jan 2007
Palmer MA
Posts: 400
Liked 16 Times on 14 Posts


I have Love TC and an Auber PID. I set all my probes in a ice bath and also boiling water to see it they needed to be adjusted. They all had to be tweaked some to get them to read the same. I used a lab thermometer as my control.


Mike



 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
How do PIDs work? rocketman768 DIY Projects 6 08-14-2009 02:34 PM
How do PIDs/SSRs work? illin8 Equipment/Sanitation 11 05-08-2009 10:22 PM
Calibrated Hydrometer? reim0027 Beginners Beer Brewing Forum 8 01-24-2009 08:52 PM
Understanding my PIDs Squeeky Brew Stands 7 06-14-2008 04:58 AM
HERMS with two PIDs Squeeky Equipment/Sanitation 0 05-26-2008 11:06 PM


Forum Jump