Hi,
I plan to manipulate the outputs of the thermocouples TypeK with a small circuitry and a simple potentiometer to adjust that output.
As the thermocouple itself is a voltage source, I ask myself if I could add and subtract a small voltage in order to manipulate the signal to get the PLC to read a different temperature, ajustable with a potentiometer. A simple voltage divider may be too baremetal, as the voltages roam around 25mV per Deg C. I only need temperatures >0°C
any suggestions how this could be done?
and please, in the German speaking boards, I would receive posts with "go and study electronics" etc... yea, if I could do so, I wouldn't need to ask and it is zero help... So I hope ther more international website here is more understanding :)
Many thanks!