---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sun 04/04/21: 8 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:03 AM - Re: Splicing shielded pair (Alec) 2. 04:04 AM - Re: Thermocouple Accuracy (Alec) 3. 04:17 AM - Re: Splicing shielded pair (Alec Myers) 4. 06:22 AM - Re: Thermocouple Accuracy (dj_theis) 5. 07:35 AM - Re: Thermocouple Accuracy (Charlie England) 6. 08:24 AM - Re: Thermocouple Accuracy (Kelly McMullen) 7. 08:31 AM - Re: Thermocouple Accuracy (mike Pienaar) 8. 01:57 PM - Re: Thermocouple Accuracy (Charlie England) ________________________________ Message 1 _____________________________________ Time: 04:03:07 AM PST US From: Alec Subject: Re: AeroElectric-List: Splicing shielded pair You strip back the shields, slide a length of shield braid over cable, and a length of heat shrink. Splice and insulate the conductors individually on a staggered basis, then slide the loose shield braid over the join and solder around both ends. Finally insulate over the top with sleeving. Sent from my iPhone > On Apr 4, 2021, at 12:22 AM, Art Zemon wrote: > > =EF=BB > Michael, > > I soldered ground wires to the shields. You could probably adapt that tech nique. See the three photos at the bottom of my blog post Wiring Harness Ins talled. > > Cheers, > -- Art Z. > > > >> On Sat, Apr 3, 2021 at 9:24 AM Michael Burbidge wrot e: >> Hi, >> >> >> >> Is there a video or instructions somewhere that describe how to splice sh ielded pair wire? >> >> >> >> Thanks, >> >> Michael- >> > > > -- > https://CheerfulCurmudgeon.com/ > Friendship is like a stone. A stone has no value, but when you rub two sto nes together properly, sparks of fire emerge. > Rabbi Mordechai of Lechovitz ________________________________ Message 2 _____________________________________ Time: 04:04:22 AM PST US From: Alec Subject: Re: AeroElectric-List: Thermocouple Accuracy Well, to me, it sounds like the cold junction compensation is off by 10 degr ees. If that=99s it, then it=99s going to read 10 degrees low at all t emperatures, and you=99re unlikely to care. Sent from my iPhone > On Apr 4, 2021, at 1:56 AM, mike Pienaar wrote: > > =EF=BBOne end of the thermocouple wire is attached to the copper ring u nder the plug, the other end is connected to the MGL RDAC unit that feeds si gnal to the EFIS. There are no joins in the wire > > Sent from my iPhone > >>> On Apr 3, 2021, at 4:53 PM, Alec wrote: >>> >> =EF=BBWhere=99s the other junction? >> >> Sent from my iPhone >> >>>> On Apr 3, 2021, at 7:00 PM, mikepienaar09@gmail.com wrote: >>>> >>> =EF=BB >>> I put my CHT sensors into boiling water at sea level and got a reading o f 200 deg F and got 22 deg F with them in ice water. Is this close enough? >>> I am using a MGL EFIS unit >>> All 4 sensors provide the same reading plus or minus 1 or 2 degrees >>> Sensors are K type attached to a copper washer that fits under the spark plug >>> >>> Thanks >>> >>> Mike ________________________________ Message 3 _____________________________________ Time: 04:17:46 AM PST US From: Alec Myers Subject: Re: AeroElectric-List: Splicing shielded pair Or this: http://www.aeroelectric.com/articles/Shielded_Wire_Splicing/S_Wire_Splice.ht ml On Apr 4, 2021, at 07:03, Alec wrote: =EF=BBYou strip back the shields, slide a length of shield braid over cab le, and a length of heat shrink. Splice and insulate the conductors individu ally on a staggered basis, then slide the loose shield braid over the join a nd solder around both ends. Finally insulate over the top with sleeving. Sent from my iPhone > On Apr 4, 2021, at 12:22 AM, Art Zemon wrote: > > =EF=BB > Michael, > > I soldered ground wires to the shields. You could probably adapt that tech nique. See the three photos at the bottom of my blog post Wiring Harness Ins talled. > > Cheers, > -- Art Z. > > > > On Sat, Apr 3, 2021 at 9:24 AM Michael Burbidge wrote : >> Hi, >> >> >> >> Is there a video or instructions somewhere that describe how to splice sh ielded pair wire? >> >> >> >> Thanks, >> >> Michael- >> > > > -- > https://CheerfulCurmudgeon.com/ > Friendship is like a stone. A stone has no value, but when you rub two sto nes together properly, sparks of fire emerge. > Rabbi Mordechai of Lechovitz ________________________________ Message 4 _____________________________________ Time: 06:22:37 AM PST US Subject: AeroElectric-List: Re: Thermocouple Accuracy From: "dj_theis" Mike, Maybe this link will offer a few ideas to help trouble shoot. https://blog.wika.us/products/temperature-products/six-common-causes-thermocouple-temperature-measurement-errors/ The ice bath error is outside of what should be expected. Do you have a separate measurement method? Fluke makes a model 52 for temperature measurement. Ive not looked into any of the low cost options from EBay but it might be something to consider as a second method to verify. Obviously you dont need the device to report accurate freezing temp but it might be indicative of a larger problem. I would suspect a wiring mistake or an error in the MGL. Dan Theis -------- Scratch building Sonex #1362 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=501253#501253 ________________________________ Message 5 _____________________________________ Time: 07:35:52 AM PST US Subject: Re: AeroElectric-List: Thermocouple Accuracy From: Charlie England On 4/3/2021 5:58 PM, mikepienaar09@gmail.com wrote: > > I put my CHT sensors into boiling water at sea level and got a reading > of 200 deg F and got 22 deg F with them in ice water. Is this close > enough? > > I am using a MGL EFIS unit > > All 4 sensors provide the same reading plus or minus 1 or 2 degrees > > Sensors are K type attached to a copper washer that fits under the > spark plug > > Thanks > > Mike > Is the MGL monitor software-configurable for type J & type K probes? If so, does config match type? -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ________________________________ Message 6 _____________________________________ Time: 08:24:57 AM PST US Subject: Re: AeroElectric-List: Thermocouple Accuracy From: Kelly McMullen Well, then you know your thermcouple is off by 10 degrees at the low end. On 4/3/2021 10:46 PM, mike Pienaar wrote: > > Normal water > > Sent from my iPhone > >> On Apr 3, 2021, at 4:48 PM, Kelly McMullen wrote: >> >> >> unless you put a lot of salt in the water for the freezing part, that reading should be very close to 32 degrees. The boiling temp is fine, takes some effort to get the water above 200. >> >>> On 4/3/2021 3:58 PM, mikepienaar09@gmail.com wrote: >>> I put my CHT sensors into boiling water at sea level and got a reading of 200 deg F and got 22 deg F with them in ice water. Is this close enough? >>> I am using a MGL EFIS unit >>> All 4 sensors provide the same reading plus or minus 1 or 2 degrees >>> Sensors are K type attached to a copper washer that fits under the spark plug >>> Thanks >>> Mike >> >> >> > > > > ________________________________ Message 7 _____________________________________ Time: 08:31:02 AM PST US From: mike Pienaar Subject: Re: AeroElectric-List: Thermocouple Accuracy Yes I have configured for =9CK=9D type thermocouple Forgot to say that MGL says results are within spec but did not say what the acceptable range is Sent from my iPhone > On Apr 4, 2021, at 7:42 AM, Charlie England wrote: > > =EF=BB > On 4/3/2021 5:58 PM, mikepienaar09@gmail.com wrote: >> I put my CHT sensors into boiling water at sea level and got a reading of 200 deg F and got 22 deg F with them in ice water. Is this close enough? >> I am using a MGL EFIS unit >> All 4 sensors provide the same reading plus or minus 1 or 2 degrees >> Sensors are K type attached to a copper washer that fits under the spark p lug >> >> Thanks >> >> Mike > Is the MGL monitor software-configurable for type J & type K probes? If so , does config match type? > > Virus-free. www.avast.com ________________________________ Message 8 _____________________________________ Time: 01:57:53 PM PST US From: Charlie England Subject: Re: AeroElectric-List: Thermocouple Accuracy Just for grins, try setting it up for type J & see what happens. MGL may well use type K for CHT, but generic CHT probes are usually type J. On Sun, Apr 4, 2021 at 10:37 AM mike Pienaar wrote: > Yes I have configured for =9CK=9D type thermocouple > Forgot to say that MGL says results are within spec but did not say what > the acceptable range is > > Sent from my iPhone > > On Apr 4, 2021, at 7:42 AM, Charlie England wrote: > > =EF=BB > On 4/3/2021 5:58 PM, mikepienaar09@gmail.com wrote: > > I put my CHT sensors into boiling water at sea level and got a reading of > 200 deg F and got 22 deg F with them in ice water. Is this close enough? > > I am using a MGL EFIS unit > > All 4 sensors provide the same reading plus or minus 1 or 2 degrees > > Sensors are K type attached to a copper washer that fits under the spark > plug > > > Thanks > > > Mike > > Is the MGL monitor software-configurable for type J & type K probes? If > so, does config match type? > > > Virus-free .. > www.avast.com > > <#m_-1463607553985861206_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> > > ------------------------------------------------------------------------------------- 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.