AirTalk.org Aviation discussions newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  EGT and CHT Probe calibration          AirTalk.org Forum Index -> Light aircraft View previous topic :: View next topic   Author Message ejb Guest Posted: Mon Mar 07, 2005 2:31 pm    Post subject: EGT and CHT Probe calibration Does anyone know if there's a way to validate that CHT and EGT probes are putting out the correct signal. Mine are getting a bit old (2.5 years) and I'd like to be sure they're working correctly. I've never seen a chart of output voltage to temperature. Does one exist? Back to top John A. Landry Guest Posted: Mon Mar 07, 2005 5:40 pm    Post subject: Re: EGT and CHT Probe calibration On 7 Mar 2005 06:31:52 -0800, in rec.aviation.ultralight, ejb said: Quote: Does anyone know if there's a way to validate that CHT and EGT probes are putting out the correct signal. Mine are getting a bit old (2.5 years) and I'd like to be sure they're working correctly. I've never seen a chart of output voltage to temperature. Does one exist? Absolutely... but you'll need an accurate digital multimeter and a reference temperature (known heat source). Try this link... http://srdata.nist.gov/its90/main/ BTW, when you start looking at the charts, you have "J" type thermocouples for your CHT and "K" type thermocouples for your EGT. You probably already know this, but... Also keep in mind that each gauge manufacturer may calibrate their temperature gauges to a different standard temperature. For example, Westberg (Westach) calibrates their gauges to either 32 or 70 degrees F depending on the intended application, whereas some companies calibrate to other temps... like 60 degrees F. So once you know your gauge's calibration temperature, you'll have to consider the difference between the temperature of the wire "cold junction" and the gauge's calibration temperature. See the following links for more info: http://www.nphheaters.com/technical/thermo_letter.htm http://www.westach.com/repair.htm#THE%20PRINCIPLE%20OF%20A%20THERMOCOUPLE Regards, John L. Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         AirTalk.org Forum Index -> Light aircraft All times are GMT Page 1 of 1   Jump to: Select a forum Aviation----------------alt.aviationAviation safety EnhancementPlanes, gliders and flying in AustraliaAviation et pilotage (Français)rec.aviationAviation (Aerobatics)Hot air, gas balloons and airshipsHang-gliding, paragliding, foot-launched flightAircraft Design & BuildingInstrument Flight RulesAviation (Classifieds)Military AircraftNaval AviationAviation (Miscellaneous Topics)Owning AirplanesAviators (General Discussions)Aviation related productsAircraft RestorationHelicopters and rotary wing aircraftsFlight SimulationSailplanesAviation (Students)Light aircraftFlying related activities in the UK Airports----------------alt.airportsEdinburgh Airport Glasgow Airport Humberside Airport Luton Airport Aberdeen Airport Glasgow Prestwick Airport  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.