>  The benefits of a super accurate A/D will be lost without the right kind of
>      connectors, and cold junction compensation.   Anyone know the magnitude
 of
>      these errors, and any ways to compensate for them without a 10 dollar
 chip?
>
>
 We have manufactered temprature indicating equipment for years, mostly
for the iron and steel industry along with importing a line of Japanese
controllers. Everything now has micros in it to compensate for the non
linearity of T/Cs. Junction compenstation is usally done 1 of 2 ways. A
device that varies with temp that is fed into the amplifier circuitry or
a solid state temprature indicator at the junction block which the micro
reads and fiqures in. For
plug in probes we use the appropiate jack/plug/wire. The final terminal
block on the PCBd is a standard type.