Re: Temperature gauge accuracy
[Re: ROADRCR]
#2126998
08/07/16 10:33 AM
08/07/16 10:33 AM
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Joined: Jan 2003
Posts: 4,275 Morrow, OH
markz528
master
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master
Joined: Jan 2003
Posts: 4,275
Morrow, OH
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Add in reflectivity and the IR readings can be pretty loosey goosey.
67 Coronet 500 9.610 @ 139.20 mph 67 Coronet 500 (street car) 14.82 @ 94 mph 69 GTX (clone) - build in progress......
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Re: Temperature gauge accuracy
[Re: 70Duster]
#2127096
08/07/16 01:17 PM
08/07/16 01:17 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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70Duster, good info! I had no idea & it makes me question how accurate my HF gun is going to be (still in pkg/ain't used it yet)
live every 24 hour block of time like it's your last day on earth
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Re: Temperature gauge accuracy
[Re: 70Duster]
#2127114
08/07/16 01:45 PM
08/07/16 01:45 PM
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Joined: Jan 2006
Posts: 8,162 USA
360view
Moparts resident spammer
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Moparts resident spammer
Joined: Jan 2006
Posts: 8,162
USA
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Although i do a lot of temperature measurement, I held off buying an IR gun until i saw the Craftsman Pro 1400 unit That includes a plug and type K thermocouple probe for fine tuning the emissivity reading http://www.searsoutlet.com/1400-Degree-N...amp;mode=seeAllI think the Fluke IR gun also has this feature. I have now seen $19 IR guns, and along with "free" Harbor Freight multimeters, i would not argue that these very inexpensive units have their place in nearly any tool bag that all vehicles ought to have
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Re: Temperature gauge accuracy
[Re: 360view]
#2127232
08/07/16 05:07 PM
08/07/16 05:07 PM
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Joined: Jan 2003
Posts: 1,642 PA
70Duster
top fuel
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top fuel
Joined: Jan 2003
Posts: 1,642
PA
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Although i do a lot of temperature measurement, I held off buying an IR gun until i saw the Craftsman Pro 1400 unit That includes a plug and type K thermocouple probe for fine tuning the emissivity reading
That sounds like the right kind of setup. But I question the need for the IR gun if you get good temp readings with the type K probe. I have a type K thermocouple probe that plugs into my multi-meter, I believe it's a GreenLee Meter. It has proven to be extremely accurate and I've never needed an IR gun because I've always been able to accurately measure temperature with the type K thermocouple probe plugged into the multi-meter.
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Re: Temperature gauge accuracy
[Re: ROADRCR]
#2147642
09/04/16 11:20 PM
09/04/16 11:20 PM
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Joined: Jan 2003
Posts: 4,275 Morrow, OH
markz528
master
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master
Joined: Jan 2003
Posts: 4,275
Morrow, OH
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You really can't depend on bare aluminum for good measurements. Tape 2 pieces side by side of flat black electrical tape (or shiny black and scotch brite it real well) and put it on the bare aluminum. Aim your temp gun a couple of inches away from the tape and you will be good to go.
67 Coronet 500 9.610 @ 139.20 mph 67 Coronet 500 (street car) 14.82 @ 94 mph 69 GTX (clone) - build in progress......
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Re: Temperature gauge accuracy
[Re: ROADRCR]
#2147975
09/05/16 01:42 PM
09/05/16 01:42 PM
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Joined: Jan 2003
Posts: 15,444 Omaha Ne
TJP
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 15,444
Omaha Ne
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if you want an accurate reading you will need an 1/8" thermocouple probe and meter. I put the probe in as close to the sending unit as possible making sure that it is in the coolant but not touching anything. Thermocouples are extremely accurate and respond very quickly. Using a probe extension one can put the meter in the car, drive it around and compare #'s. My experiences show that if the readings are off, they typically go further out of calibration the warmer the temp. if it's an electrical gauge this can be due to grounds, other electrical issues, the sending unit, or the gauge itself. Inexpensive meters and probes are available on ebay. Do be aware their are different types of probes with J or K being the most common. There are also different connector styles so heads up on that as well
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