Fluidized Bed Combustor -- part 2 (prototype thermocouple problems)

[80amnesia]

love your vdos!!

[supertruckertom]

Wiper motors are a notorious source of noise to mobile radio users. FM mobile radio is pretty much immune but anyone operating SSB or AM modes sure has dealt with interference from wiper motors.

[shemp747]

You likely have a ground fault or circulating currents between different ground potentials being carried down the thermal couple leads. Switching from a grounded to an ungrounded TC or vise versa (depending on if you have circulating current or noise problem might fix it.

It looks like you are using a DC motor so a DC power supply could be an issue. Isolating the motor from ground, eliminating circulating current, ground bonding or noise filtering might to it as well. Fun Project!