I have a Labjack U6. I know that the built-in temperature sensor is not accessible when the device is being used in stream mode, having read this in the user's guide.
I am looking to measure the temperature and RPM of a machine.
I have thermocouples which I have no trouble using with the built-in temp sensor as the CJC. I know there are other options for sensors out there, but I have the materials to make my own TCs. Also, the sensors will inevitably get destroyed when I use them, so continuing to buy new parts is not an option.
I also have a reed switch - I know I can use this with a timer in stream mode to determine the RPM with some simple math.
Since stream mode locks out the built-in temp sensor (and for good reason - poor response time of the sensor), I am left scratching my head.
My first guess at solving the problem would be to use a calibrated temperature sensor to measure the ambient temperature (therefore, creating my own CJ reference which can be used outside of stream mode?). I'm not sure about the response time of thermistors and those things, though. Does this sound like the most reasonable solution? Any other suggestions?