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
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| Subject: | Re: 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 <art@zemon.name> 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 <mburbidg@gmail.com> 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
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| Subject: | Re: 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 <mikepienaar09@gmail.com> 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 <alec@alecmyers.com> 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
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| Subject: | Re: 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 <alec@alecmyers.com> 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 <art@zemon.name> 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 <mburbidg@gmail.com> 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
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| Subject: | Re: Thermocouple Accuracy |
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
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| Subject: | Re: Thermocouple Accuracy |
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?
--
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Message 6
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| Subject: | Re: Thermocouple Accuracy |
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 <kellym@aviating.com> 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
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| Subject: | Re: 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 <ceengland7@gmail.com> 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
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| Subject: | Re: 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 <mikepienaar09@gmail.com>
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 <ceengland7@gmail.com> 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?
>
>
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