Robert Wolcott wrote:
I would guess that the heater puts out a few watts (12V 1A or so).

.... so about 12 watts.


"NSM" wrote in message
news:dD2Gd.97965$dv1.33586@edtnps89...

"Robert Wolcott" wrote in message
...
| This is more of a design question, but there are some pretty sharp
people
on
| this board so I'll post it here. I am designing a closed loop thermal
| control unit that would like to be very accurate (+/- .2 degrees C). I
plan
| to use a PID controller with an RTD sensor and a small tape style
heater.
|
| Most PID controllers only provide a signal out and do not directly power
the
| heating element. If I had a PID controller providing a low voltage
signal
| (mV), what sort of intermediate circuit would I need to power a 10-50
watt
| heating element? My main goal is not necessarily accuracy, but
stability.

I'd be inclined to make a closed loop controller which is controlled by
the
PID output. What volts/amps for the heater?

If you can find an old GE SCR manual you should find some good starting
points.

N







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