---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Tue 07/05/22: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:14 AM - Re: Thermocouples: grounded or ungrounded (Paul Eckenroth) 2. 10:52 AM - Re: Re: Thermocouples: grounded or ungrounded (Robert L. Nuckolls, III) 3. 04:00 PM - Re: Re: Thermocouples: grounded or ungrounded (Paul Eckenroth) 4. 05:17 PM - Re: Re: Thermocouples: grounded or ungrounded (Robert L. Nuckolls, III) 5. 05:31 PM - Re: Re: Thermocouples: grounded or ungrounded (Charles Kuss) ________________________________ Message 1 _____________________________________ Time: 09:14:50 AM PST US Subject: AeroElectric-List: Re: Thermocouples: grounded or ungrounded From: "Paul Eckenroth" Thanks for the reply Bob. Unfortunately my GRT EFIS cannot read Thermocouples except as used for EGT and CHT. Therefore I am using small inexpensive readers off Amazon. I seriously doubt if they have any specialized circuitry other than that require to give a basic reading of the thermocouple. Does the ground loop have the potential of rendering the reading totally unusable or is it more like a 5% loss of accuracy. The ungrounded probes are around twice as expensive as the grounded probes. I would certainly be willing to consider a better reader if it can be had in a small format. The Onex is a single seat very small plane with limited panel space. Thanks for your help. Paul Read this topic online here: http://forums.matronics.com/viewtopic.php?p=507411#507411 ________________________________ Message 2 _____________________________________ Time: 10:52:25 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: Thermocouples: grounded or ungrounded At 11:13 AM 7/5/2022, you wrote: > >Thanks for the reply Bob. Unfortunately my GRT EFIS cannot read >Thermocouples except as used for EGT and CHT. Therefore I am using >small inexpensive readers off Amazon. I seriously doubt if they >have any specialized circuitry other than that require to give a >basic reading of the thermocouple. Does the ground loop have the >potential of rendering the reading totally unusable or is it more >like a 5% loss of accuracy. The ungrounded probes are around twice >as expensive as the grounded probes. I would certainly be willing >to consider a better reader if it can be had in a small format. The >Onex is a single seat very small plane with limited panel >space. Thanks for your help. Okay, best bet is go grounded thermocouples PLUS take your power ground wire for the instrument(s) out to some handy spot on engine. Got a link for these probes? Bob . . . Un impeachable logic: George Carlin asked, "If black boxes survive crashes, why don't they make the whole airplane out of that stuff?" ________________________________ Message 3 _____________________________________ Time: 04:00:32 PM PST US From: Paul Eckenroth Subject: Re: AeroElectric-List: Re: Thermocouples: grounded or ungrounded Bob, here are the links: Probes: https://cdn.automationdirect.com/static/specs/psthermoprobebors.pdf Reader: https://www.amazon.com/PEMENOL-Fahrenheit-Temperature-76F-999F-Thermocouple /dp/B07X37WH5Z/ref=asc_df_B07X37WH5Z/?tag=&linkCode=df0&hvadid=3867 75205645&hvpos=&hvnetw=g&hvrand=7435587142193397440&hvpone=&hvptwo =&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9006641&hvtargid =pla-841393864259&ref=&adgrpid=77847887454&th=1 Thanks Paul On Tue, Jul 5, 2022 at 1:55 PM Robert L. Nuckolls, III < nuckolls.bob@aeroelectric.com> wrote: > At 11:13 AM 7/5/2022, you wrote: > > jeckenroth@nbn.net> > > Thanks for the reply Bob. Unfortunately my GRT EFIS cannot read > Thermocouples except as used for EGT and CHT. Therefore I am using small > inexpensive readers off Amazon. I seriously doubt if they have any > specialized circuitry other than that require to give a basic reading of > the thermocouple. Does the ground loop have the potential of rendering t he > reading totally unusable or is it more like a 5% loss of accuracy. The > ungrounded probes are around twice as expensive as the grounded probes. I > would certainly be willing to consider a better reader if it can be had i n > a small format. The Onex is a single seat very small plane with limited > panel space. Thanks for your help. > > > Okay, best bet is go grounded thermocouples PLUS > take your power ground wire for the instrument(s) > out to some handy spot on engine. > > Got a link for these probes? > > Bob . . . > > Un impeachable logic: George Carlin asked, "If black boxes > survive crashes, why don't they make the whole airplane > out of that stuff?" > ________________________________ Message 4 _____________________________________ Time: 05:17:55 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: Thermocouples: grounded or ungrounded At 03:53 PM 7/5/2022, you wrote: >Bob, here are the links: > >Probes:=C2 =C2 >https: //cdn.automationdirect.com/static/specs/psthermoprobebors.pdf > >Reader:=C2 =C2 >https://www.amazon.c om/PEMENOL-Fahrenheit-Temperature-76F-999F-Thermocouple/dp/B07X37WH5Z/ref= asc_df_B07X37WH5Z/?tag=&linkCode=df0&hvadid=386775205645&hvpos=&hvne tw=g&hvrand=7435587142193397440&hvpone=&hvptwo=&hvqmt=&hvdev=c&h vdvcmdl=&hvlocint=&hvlocphy=9006641&hvtargid=pla-841393864259&ref= &adgrpid=77847887454&th=1 Okay, how do you plan to attach the probes to the stator . . . bolts? We used to weasel small t/c wires under the stator windings of a motor. How many total points to you plan to monitor? Have you considered a single instrument and rotary selector switch to manually scan through the array of thermocouples? Bob . . . Un impeachable logic: George Carlin asked, "If black boxes survive crashes, why don't they make the whole airplane out of that stuff?" ________________________________ Message 5 _____________________________________ Time: 05:31:30 PM PST US From: Charles Kuss Subject: Re: AeroElectric-List: Re: Thermocouples: grounded or ungrounded Paul, do you have a GRT EIS to go with your EFIS? If so, the EIS has the ca pability to have auxiliary inputs added. You can hook additional thermocoup les to take temperature of other items on the aircraft using those auxiliar y inputs. Sent from Yahoo Mail on Android On Tue, Jul 5, 2022 at 6:11 PM, Robert L. Nuckolls, III wrote: At 11:13 AM 7/5/2022, you wrote: --> AeroElectric-List messageposted by: "Paul Eckenroth" Thanks for the reply Bob.=C2- Unfortunately my GRT EFIS cannot readThermo couples except as used for EGT and CHT.=C2- Therefore I am usingsmall ine xpensive readers off Amazon.=C2- I seriously doubt if theyhave any specia lized circuitry other than that require to give a basicreading of the therm ocouple.=C2- Does the ground loop have thepotential of rendering the read ing totally unusable or is it more like a5% loss of accuracy.=C2- The ung rounded probes are around twice asexpensive as the grounded probes.=C2- I would certainly be willing toconsider a better reader if it can be had in a small format.=C2- TheOnex is a single seat very small plane with limite d panel space.=C2-Thanks for your help. =C2- Okay, best bet is go grounded thermocouples PLUS =C2- take your power ground wire for the instrument(s) =C2- out to some handy spot on engine. =C2- Got a link for these probes? =C2- Bob . . . =C2- Un impeachable logic: George Carlin asked, "If blackboxes =C2- survive crashes, why don't they make the whole airplane =C2- out of that stuff?" ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.