LogTag Temperature Recorders
LogTag Temperature Recorders
Need advice?

Help! My LogTag says it hit -40°

If you retrieve the temperature data from your LogTag and you see a reading of -40°C, don’t panic. This is just the LogTag’s way of telling you it couldn’t take its normal temperature sample. Your refrigerator didn’t get that low.


-40°C What Happened?

So what happened?

The LogTag took a reading  and could not find a connection to the probe (see image on the right). 

If your LogTag is disconnected from the probe, during a scheduled reading, it will log as -40°C rather than the actual temperature inside the environment. 

The design of your specific LogTag means it needs to be connected to a probe to ensure every recording is true of the environment it is monitoring.


So how can I avoid this?

When doing a download, this can cause an -40°C reading to occur, as your LogTag is away from the probe. 

  1. Ensure your LogTag Software (Analyzer) is open and ready to be used.

  2. Pres the ‘Start/Mark’ button (once) and disconnect your LogTag from the probe.

  3. Insert your LogTag into your reader (cradle).

  4. Once your data appears on the screen, take out your LogTag from the reader immediately and re-connect it to the probe – ensuring the probe is securely inserted into the LogTag’s brass attachment point.

Your LogTag should only be away from the fridge for, ideally, 30 seconds. This will minimize the -40°C readings appearing on your reports. 


If this -40°C consistently appears on your reports and you know your LogTag is not being left out from the probe, then it could mean you have an issue with either the probe or Logger. 

You can call the support team if you require further insight into this matter, on 1300 08 20 20.