PID with no RTD?

[Fizzycist]

I bought the PID over at Auber and was planning to just use it in manual mode with my boil kettle until I have my HLT set up, but it seems that unless I actually have some sort of temperature input on it, it faults to the lowest output setting. Is there a way to trick into thinking I have some temperature input, or do I really just have to buy an RTD that will be measuring nothing for the mean time?

 

[Shockerengr]

put a 100 ohm resistor where the RTD would go (assuming a PT100 RTD is what it's looking for)

It'll read 32f / 0C then.

 

[Walker]

put a 100 ohm resistor where the RTD would go (assuming a PT100 RTD is what it's looking for)

It'll read 32f / 0C then.

^^^

This.

 

[Fizzycist]

I love you guys, thanks! I'll be trying that as soon as I can make it to Radio Shack.

 

[Fizzycist]

Hmm. Ok, so I tried the 100 ohm resistor in all 3 combinations of positions on the PID marked RTD with the setting on pt100 RTD. It still gave me the error message saying no temperature input.

 

[Shockerengr]

Ok, you'll need to connect two of the pins together to mimic a three wire rtd

so if you have a, b, c pins connect a and b together and put the resistor between b and c.

adjust the pins as appropriate for the pid

 

[Walker]

... and make sure you have told the PID that you have a RTD temp probe connected. Those things take many different sensor types, and that 100 Ohm resistor is mimicking a pt100 sensor. I think the PIDs come programmed to expect a K-type thermocouple by default.

 

[Fizzycist]

All, right, I found instructions in the manual to jumper to terminals for a 2 wire RTD as opposed to 3 and that seems to have it working. Thanks so much guys. If you are ever in Idaho Falls PM me and there's a beer or two with your name on it!