Three TC08 USB units. Trying to measure and log 24 T type thermocouples. All 24 appear in the live list of inputs, but the spreadsheet and logging to a text file options seem to have a limit of 15 channels. We have used it initially at 12 + 12 for calibrating our thermocouples, but if we are unable to record all 24 channels simultaneously then our test plan falls to pieces. Have we missed something glaringly obvious?