Using a TC-08 logger, PicoLog 5.10.3 and attached type-T exposed junction thermocouples, I have attemped to take temperature readings at intervals of 1 ms and 10 ms for 5 seconds. The TC-08 is attached to a desktop using a general, store-bought Serial-to-USB connector. I have an application that requires many quick readings in around 2-3 seconds.
However, the results in PicoLog show that most of the temperatures recorded are the same. For blocks of 1/2 to 1 second the readings are the same. Because I have a TC-08 I can only use the "Real-time continuous" recording method and not the "Fast block (single converter only)." I have set the "Readings per sample" to both 'As many as possible' and 'Single' without a change.
I am wondering why this is occurring since the data logger help says it should be able to read at the millisecond level. Browsing the forum, I ran across a reference to the logger using the Windows clock. Could this be a problem? Also, what about averaging of the incoming signals? The help files mention it. Is there a way to disable this function in order to gain a much quicker (albeit possibly skewed) reading?