controlling a strip heater?

From: Bill Kraus (nospam_at_digita1biologyno_spam.com)
Date: 07/05/04 

Date: Mon, 5 Jul 2004 12:13:03 -0700

Hi -

I'd like to build a circuit that will control the temperature generated by a
high density strip heater. The goal is to use a temperature controller (with
a thermocouple) whose output is wired to the heater - the temperature range
is from 10 to 100 C.

The strip heaters I've seen are driven by either a 120 or 240 voltage
source. The temperature controller I'm looking at has an input voltage of
either 12 or 24 VAC (what is the advantage of each?) and an SPDT relay
output at 4 amps (26 VAC resistive). I assume that I can use a transformer
to go from the household outlet to the controller, but do I need a
transformer from the controller to the heater strip?

Any other advice/suggestions would be appreciated.

Relevant Pages

  • Re: disable cold junction compensation
    ... reference on a Watlow 93 temperature controller. ... I would like to use the controller to control the differential ... temperature in a heating system. ...
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  • disable cold junction compensation
    ... reference on a Watlow 93 temperature controller. ... I would like to use the controller to control the differential ...
    (sci.electronics.components)
  • Re: Serial Communication
    ... Your PCI controller (the first problem). ... Is the flow control for these com ports set to 'none' ?  ... But you got no data from your temperature controller. ...
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