manual temp gauge vs bacharach digital fyrite

soot_seeker_2

so there i am, tuning up my 1980 JOT w/ a new AFG using a 6 month old (really nice) bacharach fyrite tech 60 digital combustion meter. i took everyone's advice and set the co2 to about 11.8-11.9%, O2 5.1%, basically 0 smoke, 20 ppm co, 28.5% or so excess air, efficiency reads about 82% - even with the gross stack temp reading about 570-590F and i've got the draft set at -.02wc over fire on my draftrite (all looks good). ok, for the hell of it, i stick around for another full heating cycle this time putting my trusty old (not that old) standard industry issue & loved Dwyer No. 720 dial temp gauge in there - and even after about 8+ minutes, the dwyer sees only about 512F max - no matter where i move it in the stream.

hmmm, could the trusty dwyer really be off that much? should i really believe the digital temp probe on the bacharach?

anybody using one of these digital fyrites?

ss

Firedragon_4

Check them against a

known source or a thermocouple type thermometer.
The Dwyer could be checked in boiling water (210F) and then you'll have a better idea where the Bacharach is.

An awful lot has been said about O2 and CO2 and CO detectors, but not much about draft gauges, thermometers and smoke tester accuracy, makes ya wonder?

I'm glad you did and good for you!!!!

soot_seeker_2

thanks for the response!

thanks for the response firedragon. i thought i'd hear a little more feedback on this but maybe nobody uses the old analog gauges anymore. i may try the boiling water test. i'm thinking of spending the $80 or so on the bacharach IR laser spot thermometer just to get a second opinion - seems like it will be a useful item to have around. i liked the one guys idea abut finding the cold leaks in the house - great idea. thanx for your input.

ss

hr

Don't put 100%

faith in point and shoot IR's either. Depending on what you point them at... Brand new shiney copper pipe throws them for a loop and other reflective surfaces.

A probe in the stream, be it air flow or water, is still the most accurate.

If the gauge is calibrated, of course

Boiling water, and ice in a glass is a common way to check, and adjust, the temperature gauge's accuracy.

Check the Bachrach site, one of the industries finest, for info on calibration. And lots of other real good info.

www.bacharach.com

hot rod

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David_5

Bacharach

The Bacharach probably can be tested with hot water also. Just don't run the pump when you do it. They use a thermocouple sensor. My bet is on the Bacharach being accurate.

David

lchmb

wrap the copper

wrap the copper with a little black tape prior to using the laser..;) work's wonder's....:)

Firedragon_4

You're totally right

hot rod and why the Testo has adjustable IR. I've been using it for a while on traps and such, very nice.

Firedragon_4

You're welcome

and check out the Testo too, it has adjustable IR.