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accurate temperature measurement
I just bought an interesting bit-o-kit.
http://thesensorconnection.com/sites...%20Readout.jpg Quote:
exhaust-gas-temperature-EGT-8-probe-harness-severe-duty Quote:
I have a 6 cyl, so 6 ports will read individual cylinders 3 will measure intake air ambient (pre turbo), charge air (pre intercooler), and intake air temp just under the grid heaters in the manifold. i also got (all with 12' leads) some weld on probes some stick ons what would you like to see tested ? oil temp rise compared to coolant temp rise. how the grill block effects coolant , oil, trans , under hood/ IAT What do you think ? Did Cummins properly balanced the fuel sys AKA each burning at the same air fuel ratio/ temp (the richer the hotter/ smokier) Dream Big Chisel Down To Reality |
Do you know if it requires periodic calibration and at how many points on the scale? I'm not even sure how you could calibrate it, you would need to accurately measure the same sample with a second device that is, presumably, more accurate.
Maybe the easiest thing to do would be to periodically check for agreement for all the sensors. At ambient then in a fire/oven? Idk |
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Touch the exposed Junction to ice, you should read 32F/0C. https://sciencing.com/calibrate-thermocouple-2659.html Quote:
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Aircraft engine instrumentation ALWAYS tempting.
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8 Attachment(s)
Got my kit
https://ecomodder.com/forum/attachme...1&d=1552546167 The best part is the probs will work with my vom( volt ohm meter), not just the gauge for automotive use. Life has been hectic. Will have to delay install till after the Allison transmission conversation is done as it is taking most of my spair time and brain power. https://ecomodder.com/forum/attachme...1&d=1552545181 What 3 years and 75k mi looks like on an exposed tip k-type prob. https://ecomodder.com/forum/attachme...1&d=1552545294 The new probes ×12 . 1 for each exhaust port and whatever else I went to measure https://ecomodder.com/forum/attachme...1&d=1552545294 as close to the exhaust valve that I can get them. Red dot is the proposed location, head side of the manifold gasket. Prob data sheets https://ecomodder.com/forum/attachme...1&d=1552545642 Surface mount stick-on probe×2 500mS k-type. https://ecomodder.com/forum/attachme...1&d=1552545642 Surface Temp. Braze or Weld on ×2K-Type 300mS https://ecomodder.com/forum/attachme...1&d=1552545974 Exposed tip probs×12 150mS. https://ecomodder.com/forum/attachme...1&d=1552545974 No data sheets on theas×2 6.5 " k-type probs . KSA8907 I got a chance to read the manual Points on the scale ? All of them , LoL.1°c/f steps.. for K-type -148°f to 2192°f which is what I will be using, the gage is also compatible with J type and E-Type "accuracy +/-5° over full range. Subject to quality of probe used." Calibration . "Fully cold Junction compensated using a precision internal temperature reference and built-in thermocouple linearization tables. " Sometimes it takes a bigger hammer but always dream big chisel down to reality |
3 Attachment(s)
Progress
https://ecomodder.com/forum/attachme...4&d=1570349661 As cast with minor port matching done by DAP (Diesel Auto Proformance) the manufacturer. https://ecomodder.com/forum/attachme...5&d=1570349719 Ported and blended https://ecomodder.com/forum/attachme...6&d=1570349746 With 6 EGT probes installed/ mocked up and ready for paint iwith 2000° ceramic paint, wrap it up with double thick exhaust wrap from all-purpose pipes and put it on. I decided that installing the individual EGT probes would work in the manifold side of the gasket with the new manifold due to aftermarket design changes/improvements leaving room with exception of #4 it sits slightlw deeper and at an off angle still centered but ~ 1/3" farther from the valve. The test showed that 4 years with the ceramic paint and wrap produced no rust or any indication that four layers of wrap had any negative effects . Paint was intact with no thermal shock cracks or flaking. That changed when I didnt rewrap after installing the Holset HX35W12. I was washing the engine bay down forgetting the manifold wasnt wraped and @about 300° the ceramic paint started poping off like popcorn. Lesson learned ceramic paint is pointless unless wrapped on headers as Road spray will compromise the ceramic paint through thermal shock. Preliminary install of the gage and 4 probes . 1 EGT in the standered exhaust manifold location. 1 in the in the elbow attached/part of the turbocharger 75-104 @idle 170° @10psi @700° EGT 321° @25psi @ 850° EGT 1 intake horn above tbe Grid heater. 0-70° above ambant 1 in radator core right next to the inlet behind grill block (cardbord between rad support and rad full width blocking the upper 1/3 above the IC flow path . Shows the cycling of the thermostat. Its why I got the gage /test rig, to do some testing and compairisons of the effects of modds. Hopefully I'll be able to get it in before the trip down to Moab, ut for the 240 endurance race, next week. |
Great work going on here!
Soon you will know all there is to know about that ole Cummins and how it heats up while doing its chores. Interesting how the paint failed with water but stood up to even higher heat while dry and encapsulated in the insulation. |
Thx for the paint/wrap experience notes. Past the fascinating temp monitoring.
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WINTER IS COMMING
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I have the gage installed temporarily, looks like Medusa's cousin is sitting on my dash, I'll get a more permanent solution built later.
Last night was upper 20'sf ambant. 68-76°compressor outlet temp @8-15psi boost. 113° peek compressor outlet temp. 81° rise 31-32°IAT at anything less than hard acceleration (not wot) 27°f under compression braking 41° peek IAT @25 mph( insufficient Ram Air) 8%hill ( medium to heavy engine loading) 3gear 312- 790° f EGT ---- Fully warmed up Med throttle 8% grade 6th gear(.61 OD) 50mph 1150rpm 20 psi top1/3 radiator (above IC) blocked Peek recall https://ecomodder.com/forum/attachme...1&d=1572032460 EGT1- 860° @ standerd sopt in the manifold CHT1-168° colent temp @radiator outlet CHT2- 118° IAT @head post IC CHT3- 258° charge air temp @compressor elbow.. Ive seen as high as 310° charge air temp @95mph 25psi boost the ic is suited to handle this for no more than 60sec. IAT's quickly rise to 120° w/55° ambient that is 7% loss of power w/same fuel delivery rate due to thermal expansion reducing 02 volume. Conversely last night showed it'sway too big for winter |
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