Digital PID Temperature Control

[Lonetree]

Grillo,

Dont think you need to heat water to make the humidity.

Think about this for a second....

Second PID is hooked to a small room humidifier that has its output into the air intake path of bator.

 

[Triggerjay]

Quote:
Where was my mind... you were talking about the voltage limit of the dry contacts.. Gotcha.. I thought you were meaning line voltage... then you said make sure its 250v - for the heating element... sorry, I got thrown off course a little..

Jason

 

[SpunkyTheMonkey]

@Grillo - actually i'm not sure who makes it...photo here, anyone recognise the manufacturers logo?

@Lonetree - if you have a room humidifier outside the bator why would you need to control it with a PID? surely you'd just need to set it to keep ambient humidity at some point close (slightly higher? not sure) to what you want inside the bator.

you're right though...you don't need to heat the water, it's the surface area of the water which determines how much humidity the water tray produces.

 

[Lonetree]

Would you want the whole room to have that high of humidity or just in the bator? I am just wanting to raise it in the bator.

 

[SpunkyTheMonkey]

the whole room doesn't matter, if you have the humidifier sitting near or next to the bator it should be enough, whether the rest of the room (rather than that part of it) ends up at the same level depends on the size of the room and how big/powerful the humidifier is, but my point is that i don't think you need to switch it on and off with a PID, and i don't think you should...you'd have a more consistent hum level inside the bator if you had a more consistent level outside the bator, and you won't get that by waiting for the hum level to drop, turning on the humidifier, waiting for it to heat up, then waiting for it to raise the hum level again.

also, you'd need a humidistat instead of a second PID surely? or can these PID things act as a humidistat as well?

 

[Lonetree]

I was thinking of a cool mist humidifier. With the high humidity air being pulled into the air intake for the bator as needed.

You could use the second PID to monitor humidity. Its the dry bulb wet bulb thing. The bator will stay at a constant air temp 1st PID. The wet bulb temperature reading on the second PID could be used to control the humidity, turning on and off the humidifier as needed. At the end of the hatch you could turn the humidity up to what you wanted.

This is all just my opinions on how it should work. Maybe I should re-title this thread trying to build the perfect bator.... LOL