Disconnecting the Gnd wire from the Neg side of the thermocouple connector > and the readings seems to track nicely with all the other test equipment > that I have. However, the max6675 is no longer able to detect when the > probe is disconnected. > > > Using a 220K resistor from the T- at the connector to ground seems to be = a working solution. The temperature now tracks the other temperature sensors and the max6675 detects the probe when disconnected. --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .