I am sorry to hear you are experiencing this problem.
The messages that are being displayed indicate that the unit and PC are not communicating. Chck in your device manager about your com ports. If you have a com1 try this as well.
If the unit will not connect on com1 or com2, I would recommend trying it on a different PC. If the TC-08 does not work on other PC's either, has it ever worked and if when was the unit last used?
If the unit does work on another PC, then they problem could be due to the voltage levels on the original PC's serial port. This you can check:
Start Picolog running and then File | New Settings once the unit has tried to connect, unplug the serial lead form the TC-08 and test the following pins in the serial cable:
Pin 4 < -7volts
Pin 7 > +7volts
Pin 5 gnd
If the serial port is giving less than the stated voltage this would casue a connection problem. You could try running the TC-08 through a USB to serial Port adapter, or I can provide a schematic on powering the unit externally. If you would like the schematic please send an email to:
and quote this forum post.