Meatheadinc wrote:Not a bad idea.
I am looking at other setup as I know the current tray is to large.It was used only to bench test the sensor.
Looking for a neat tray grill combo ,
Maritimer wrote:Have you been thinking about logic control of some sort? A few relays could do wonders.
Meatheadinc wrote:I was worried that this system would encourage smearing of fractions hence why I only used it for fores and heads, have you experienced this ?
badbird wrote:The problem with thermocouples is they don't work well through standard plugs, sockets and lead extensions so should be connected directly to the back of the PID.
The most common error in thermocouple construction is a circuit extension with dissimilar metals such as copper wires. As explained in the Principles... section above, it is crucial to know the temperature at this point of transition, as this point is the very definition of the reference junction. All further junctions are irrelevant past the point where the switch to copper is made. The mistake is in making this junction without measuring its temperature, and then proceeding as if the reference junction is a different junction nearer the voltmeter; when the compensated voltage \scriptstyle V + E(T_\mathrm{ref}) is calculated, this fake reference's temperature is used in place of the actual reference temperature. If the desire is to make an extension without needing a thermometer at that location, then extension wire (see below) may be used; this allows the reference junction to be made closer to the voltmeter.
badbird wrote:It sounds like the leads are picking up noise if both the PIDs with thermocouples are doing much the same thing, I guess the cables probably need better shielding.
I am using a cut thermo lead for extension
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