Receiving the notification "LogTag not found"

When you have inserted the Logger into the interface cradle, are trying to download (re-configure) the Logger but you see the following error message on the screen;


You may also see the message 'Error [23]'.


It means that the Logger interface cradle is working correctly but the communication between the interface cradle and Logger is not working.

Ensure that the Logger is inserted correctly, with the metal contacts on the Logger, mating with the protruding contacts inside the cradle.
If you are still having issues here are some suggestions that might resolve the issue;

  • There is poor electrical connection between the Logger and the interface cradle; this can happen if the contacts are dirty or have been exposed to a corrosive environment. Usually this can be corrected by cleaning the contacts on the Logger. Use a soft, damp cloth. For stubborn stains you can also use a soft pencil eraser. The images below show the differences between clean and dirty contacts.

    Dirty contacts


    Clean contacts

  • There is a “stuck" contact pin inside the interface; look inside the slot, there should be three contact pins visible, they should slide in and out with moderate resistance when force is applied (e.g. with the end of a pencil). Make sure all pins move freely.
  • There is not enough power being supplied to the interface (USB); We have seen this error when USB interfaces are used on unpowered USB hubs with other equipment also connected. USB ports have a limited ability to supply power and we would always recommend to connect the USB interfaces directly to the computer or to use a powered hub.
  • The USB port is defective; try a different port and see if the error persists.
  • The Logger battery is critically low. If the logger has a replaceable battery, please change the battery .
  • The Logger has just been removed from a cold environment. Lithium cells and in fact all batteries typically exhibit a lower battery voltage in cold conditions, sometimes significantly lower, so downloading units that have come e.g. directly out of a freezer could show communication problems. In that case it may pay to wait until the unit has acclimatised to room temperature or slightly above.
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