Extech CO Meter

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1

Originally Posted By: James D Mosier
This post was automatically imported from our archived forum.


Hello all,


I just recieved several tools meters and started fooling around and need some guidance.

My Grandfather's house has a 1 yr old hot water heater, I was checking for CO and found 1~2 ppm at the draft hood. No problem. The house itself was at a steady 1 ppm.

I noticed that the flue wasn't really attached to the draft hood (just sitting there) so I removed it while it was firing to check the CO of the actual flue gas. About 1 foot above the hood (due to the heat) I was getting 2~3 ppm. I really expected more.

Two questions so far:

How much heat can these meters take?

Is the reason for 2~3 ppm reading of the flue gas due to very efficient burning of a relatively new water heater or a bad meter?


Thanks again!

--
Jim Mosier

2

Originally Posted By: James D Mosier
This post was automatically imported from our archived forum.


Well I checked my tailpipe and ran the numbers right off the dial so I guess the meter works. It only took 2 seconds so heat wasn’t an issue.

–
Jim Mosier

3

Originally Posted By: dandersen
This post was automatically imported from our archived forum.


Be careful,


those test meters are not combustion analyzers and are not intended to be stuck up a draft hood. You may damage the sensor.

4

Originally Posted By: James D Mosier
This post was automatically imported from our archived forum.


Thanks for the warning. Is that damage from heat or overload of CO?

–
Jim Mosier

5

Originally Posted By: dandersen
This post was automatically imported from our archived forum.


Both, I think.


We use special testers to do combustion analysis and CO testing inside oil burners ect.

Unless that is what you have, check Mfg. spec.

6

Originally Posted By: Gary Reecher
This post was automatically imported from our archived forum.


If all else fails, “What does the operating instructions say?”


What model Extech meter do you have?

--
Gary Reecher, CM
HVAC Service Technician

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