TESTO 324 - Updating the instrument software

8 Tips and assistance
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8.3. Updating the instrument software
Under www.testo.com/download-center you can download the
current instrument software (Firmware) for testo 324 (registration
required).
> Unplug the mains unit and switch off the testo 324.
1. Hold down [▲].
2. Plug in the mains unit, continue holding down [▲].
- The display shows Firmware update along the bottom edge.
3. Release [▲].
4. Insert the connecting cable (0449 0047) into the USB-port on
the instrument, then connect it to the PC.
- Your PC recognises the testo 324 as a removable medium.
5. Copy the new file (ap324rel.bin) to the detected removable
medium.
- On the display the status bar progresses from left to right. This
process may take a few minutes.
6. Disconnect the connecting cable from the testo 324.
- Once the instrument software (firmware) has been updated, the
system will automatically reboot and is ready for use.