gscace wrote:I have a project envisioned that's gonna require all 8 channels.

-Greg

8 channels???!!?? Is one of those from a thermosensor under your tongue?

Balthazar_B wrote:8 channels???!!?? Is one of those from a thermosensor under your tongue?

In the world of dataloggers 8ch is kinda the starting point, I regularly use 10-20 channels on the home projects and 200-300 channels on systems at work.

You need to keep in mind that temperture is not the only thing thatis measured.

Sean

Balthazar_B wrote:8 channels???!!?? Is one of those from a thermosensor under your tongue?

In the world of dataloggers 8ch is kinda the starting point, I regularly use 10-20 channels on the home projects and 200-300 channels on systems at work.

You need to keep in mind that temperature is not the only thing that is measured.

Sean

lennoncs wrote:You need to keep in mind that temperature is not the only thing that is measured.

For those who are reading this and thinking "OK, like what?", the epilogue of the Buyer's Guide to the Expobar Brewtus shows one example:



Although I've not rigged something as fancy as this, it's not hard to imagine that knowing precisely when the pump was engaged, heating element turned on, or solenoid X closed would give you a better picture of the system dynamic (not to say that it doesn't boggle my mind too ).

miKe mcKoffee wrote:Actually I was leaning towards the Thermoworks for about 2.8 times more. However, I missed that information you posted about datalogging mode up to 1024 records for the OMEGA, so thanks. Sounds worth looking into further. Need to find out exactly what they mean by 16 "sets" of 64 records. Whether it just means a continous datalogging is broken up into separate record sets or if each event limited to 64 records with total of 16 isolated sessions possible.

Hi Mike,

At the end of the 64 records it rolls over into the next section. With a logging frequency of 1 sample/s, there's no gap. With a frequency of one sample every 2 seconds, there seems to be a three-second gap in the time stamps. I've reverse-engineered the protocol for my own use on a Mac, and have a little Python code that gets the input using a commercial USB/serial driver and massages it appropriately. I'll send them to anybody who asks. The supplied Windows software is cumbersome and buggy.

Best,
David

gscace wrote:I have a project envisioned that's gonna require all 8 channels.

it's taken you long enough to get there...

i'm using 6 on my 2-group right now, and i've used 8 several times on the 4-group.

i've even thought of getting a second TC08, because if i log all the machine data, then i don't have room for the portafilter data, too!

barry wrote:it's taken you long enough to get there...

i'm using 6 on my 2-group right now, and i've used 8 several times on the 4-group.

i've even thought of getting a second TC08, because if i log all the machine data, then i don't have room for the portafilter data, too!

How are you guys measuring things like flow, volume, pressure, pump cycle and heater cycles?

It appears that the Picotech is only a thermocouple device.


Thanks
Sean

nah, i need all those channels just for temp.

i haven't got 'round to pressure & flow yet.

And it even makes espresso...