STC1000 and relay

[mosquat]

Hello all,

I've followed a couple of posts on here around adding a relay to an STC1000 so it can be used to control a heating element - my main source of info was this post:

viewtopic.php?f=6&t=46225

So I got the same relay and socket as Timbobist.

I've wired it up once already and the relay buzzed loudly then popped (with smoke)

So I tried again with another relay and exactly the same thing is happening - I managed to turn off before this relay blew up.

Any advice on this would be appreciated - I expect number 1 comment will be to get someone else to wire it up

[themadhippy]

check the coil voltage of the relay,should be 240V AC,think maplins have moved there codes around some stuff that was 240v is now linking to 12v stuff

[Andy]

Yes, if you've hooked up a 12v relay to 240v then it won't end well.

[mosquat]

Cheers for that guys, you're right....hopefully they will exchange it tomorrow.

Maybe I did wire it correctly after all

[BenB]

Electronics don't work after you let out the magic smoke. ...

[mosquat]

Haha

[mosquat]

I found this site quite useful as an entry into relays and electronics

http://www.learningaboutelectronics.com ... -a-circuit

[Normski]

Hi Mos

I believe you are wanting to use an ATC1000 & relay to temp control your HLT.
The also now sell an ATC100 that has a built in 30A relay.
I bought one last year and have been using it since.
Less than a tenner delivered, best brew bargain I have.

http://www.ebay.co.uk/itm/350841056022? ... EBIDX%3AIT

Norm

[Grumpydev]

Hi Mos

I believe you are wanting to use an ATC1000 & relay to temp control your HLT.
The also now sell an ATC100 that has a built in 30A relay.
I bought one last year and have been using it since.
Less than a tenner delivered, best brew bargain I have.

http://www.ebay.co.uk/itm/350841056022? ... EBIDX%3AIT

Norm

How do you use it? Do you use the sensor that comes with it and dangle it in the water, or do you use a different sensor?

[mosquat]

Thanks for that Norm, wouldve saved me some time and money, finally got my relay setup to work but when it pops I will be clicking on that link

[Jules T]

Hi Mos

I believe you are wanting to use an ATC1000 & relay to temp control your HLT.
The also now sell an ATC100 that has a built in 30A relay.
I bought one last year and have been using it since.
Less than a tenner delivered, best brew bargain I have.

http://www.ebay.co.uk/itm/350841056022? ... EBIDX%3AIT

Norm

Norm,

Just about to build myself a temp control unit and was looking to get an STC 1000. What the difference between that and the ATC100?

Jules

[steambrew]

I use a stc1000 but would i be better using a atc1000 does it work the same

[Grumpydev]

The STC1000 is two relays, each rated at 10A, so you can hook up both a heating element and a chiller to the same unit.

The ATC1000 is a single relay, rated at 30A (allegedly, there's some debate on that in the reviews, but looks like 13A minimum), so you can hook up *either* a heating element *or* a chiller, but I believe switching which mode its in is a bit of a pain.

So..

If you're using it for things with a load < 10A and need, or might need in the future, heating and chilling then an STC1000 is your guy - e.g. a fermentation fridge

If you're using it with a load > 10A, and only need to heat or chill, then the ATC1000 is the one - e.g. a HLT

If you're using it with a load > 10A and need to heat and chill (or if you need more than one relay for other reasons) then you probably want an STC1000 and some external SSRs.

[Fil]

the ATC800+ controller, seen here [url=https://flic.kr/p/d6m99G]

controls both heating and cooling concurrently ok.

has a 30a relay on the cooling circuit so can switch much bigger fridges/freezers

it has a nice big see from the other side of the room display and a wipe clean front face.

it wont allow setting a fractional temp ie whole number target setting 1,2 21C for example while the stc1000 will alow you to set a target temp with decimal places ie 18.3C

And you cant set a probe offset to account for any error testing your probes reading reveals.

Tho u wont need to lookup the manual every time u want to change a setting its very simple to use.

[mosquat]

Good info, and I like where you put your heater...just about to find somewhere for mine to go and assumed on the deck is the only place.