A couple questions about mypin t4 and pt 100 probe
- Thread starter evan5159
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I read somewhere that the wiring can differ in some of these MyPin units from what is stated in the manual. There is a sticker on the side of the device that apparently always shows the correct wiring - does this match what is in your manual ?
augiedoggy
Well-Known Member
maybe at this point that damaged pt-100 probe damaged the pid controller...it makes logical sense... And at this point its the only reason that does.
especially it it was connected to the pid when your daughter accidently hit the wire with the torch.
I double checked all three of my "mypin" pids last night while brewing by comparing them to a manual thermometer and they are withing 1/2 degree at multiple random temps when I checked them.. I'm still impressed compared to what I've read about RTD's tending to be out at different temps
augiedoggy
Well-Known Member
that doesnt really mean anything...I repair flat screen tvs as a hobby and often the boards look fine when theres a bad component..
you said you already had the first pid start smoking when you wired the damaged rtd a different way well the second pid may have been damaged a different way since you had wired the shorted component a different way....My moneys on the pid being bad. gives you an excuse to go with a TD4 with manual mode... they are only $26 shipped..
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augiedoggy
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I know you got to be pretty discouraged right now but now that you found the initial issue with the damaged rtd wire I think thinks will go smooth.
augiedoggy
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It's very hard to damage controller by probe even if probe is faulty. You need to apply noticeable voltage/current to PID pins to make a harm.
augiedoggy
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well he did say he actually caused another pid to smoke when he wired up the damaged RTD according to pwms method and that normally works too? I dont know what else could possibly cause it unless his second pid is just defective...
That or theres another variable here we dont know about at this end?
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Find a 100 Omh resistor disconnect everything from pins 7-10 and connect that resistor between 7 and 8. If your PID is OK it should display temperature around 32F
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Sounds like an error in wiring.
First - woohoo!
Second - Ignore this (And I know you probably don't want to) Just to understand what is going on, what happens if you disconnect the red to 9? I would expect that 7 & 8 are the actual sensing circuit and 9 is the wire compensation, but we don't know if it is comparing between 7-9 or 8-9. If it doesn't change when disconnected I would say you have it right, if it does I would go with: 7 blue, 8 red, 9 red.
Checking through what you have done so far I would assume that the actual sensing ciruit is between 8 & 9, since connecting it Augie's way short circuited this connection which would give -401°F, and PWM's way is the same result as well.
Second - Ignore this (And I know you probably don't want to) Just to understand what is going on, what happens if you disconnect the red to 9? I would expect that 7 & 8 are the actual sensing circuit and 9 is the wire compensation, but we don't know if it is comparing between 7-9 or 8-9. If it doesn't change when disconnected I would say you have it right, if it does I would go with: 7 blue, 8 red, 9 red.
Checking through what you have done so far I would assume that the actual sensing ciruit is between 8 & 9, since connecting it Augie's way short circuited this connection which would give -401°F, and PWM's way is the same result as well.
OP
OP
evan5159
Well-Known Member
My friend looked at the data sheet and the sticker on the side. His first reaction was to mention they don't match. He tried to explain it to me in electrical crap terms as you did Matt. I don't know wtf he was talking about. I said thanks and now owe him a batch of stout.
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That what I mentioned earlier - although I must admit I only discovered this yesterday too. See below, it mentions the discord between manual and sticker some way down the post:
http://www.smokingmeatforums.com/t/...tructions-and-general-pid-ssr-info-by-request
In some cases, the sticker says sensing on pins 8 & 9, the manual says 7 & 8 ! Moral of the story - trust the sticker!
So we have found the MyPin arcilies heel! Not a big one though - Someone does need to make a PID sticky with all the pitfalls of the different models.
augiedoggy
Well-Known Member
I just pulled my panel apart for the second time to check because all this really has be confused.... pin 7 is the single colored wire and 8&9 are the two same color wires.... how is it that he had to wire it wrong according to the td4 diagram I have to work?? am I missing something? again I have 2 td4s and a TA7 wired this way and they are dead on?
could it be the wires are connected wrong to the sensor?
I have two different types of rtd's wired this way. (Three sensors)
or maybe there a design change and two different types of TD4's out there.
weird thing is I just ordered the second one and installed it last week and its the same as the first.
Yes you missed this post where he said that there are in fact models with a different wiring - the sticker on the side should reflect how you should wire it.
And to be fair you have to admit that you too have actually wired it wrong compared to the wiring diagram you have
augiedoggy
Well-Known Member
Yes you missed this post where he said that there are in fact models with a different wiring - the sticker on the side should reflect how you should wire it.
And to be fair you have to admit that you too have actually wired it wrong compared to the wiring diagram you have
yes theres a Ta4 and a TD4 I have both as I mentioned... unless he doesnt has the ssr (SNR) model?
Not what that post meant - there are models that have a different wiring/pins for the sensor inputs. The sticker that is on the side of all the units should tell you how to wire the PID that you are holding in you hand. Here is the differnet wiring as post in Len's link
ADVICE: Wire the MyPin PIDs as per the wiring diagram affixed to the unit, not the one in the manual
augiedoggy
Well-Known Member
yes but the one in question is a TD4 at least thats what the OPs pics are and if its the ssr control model (SNR) then I have two...
or is there another TD4 model for ssr control that I havent seen yet?
The diagrams and manual both match in my case... and the manual even has the diagrams for the other series mypin pids in it.. my ta7 manual has the diagrams for the tA6 AND TA4 series and the ta4 diagram is exactly the same as the TD4 so they must have changed some of the pids or the OP does not have the SNR series thats meant for driving an SSR as far as I understand.
or is there another TD4 model for ssr control that I havent seen yet?
The diagrams and manual both match in my case... and the manual even has the diagrams for the other series mypin pids in it.. my ta7 manual has the diagrams for the tA6 AND TA4 series and the ta4 diagram is exactly the same as the TD4 so they must have changed some of the pids or the OP does not have the SNR series thats meant for driving an SSR as far as I understand.
The OP (evan5159) has stated that the supplied manual did not match the sticker. Regardless of the model in question, this was the issue.
This thread was convoluted, and outright confusing at times, and it appears as though many wires got crossed, metaphorically and literally, as a result.
The issue has been resolved, and the take away knowledge is that some MyPin PIDs may be provided with incorrect documentation.
augiedoggy
Well-Known Member
Evan whats the full model# of your pid?
If there are 2 types of wiring for the TA4 then it wouldn't be too far of a stretch to accept that there will also be 2 types for the TD4 - after all the only difference between the TA/TD is a software change allowing the use of the "manual mode"
augiedoggy
Well-Known Member
I agree!
but as far as I understand there is only one TD4 like he pictured thats designed to control an ssr and thats why I was so convinced what would work for me would work for him...
all my manuals match both my model pids... so what model is he using?
If Im wrong I really want to know for future reference.
Just to correct your last statement
Some MyPin PIDs may be required to be wire not as per the documentation. The sticker provided with the unit should be followed in all cases
augiedoggy
Well-Known Member
Not what that post meant - there are models that have a different wiring/pins for the sensor inputs. The sticker that is on the side of all the units should tell you how to wire the PID that you are holding in you hand. Here is the differnet wiring as post in Len's link
ADVICE: Wire the MyPin PIDs as per the wiring diagram affixed to the unit, not the one in the manual
To help sort confusion.. I can confirm the ta4 manual does not match the ta4 sticker shown here the ta7 does match ... and the TD4 like the op pictured also matches the diagrams if its the SNR model..
