Extech Ex540 1.00.0 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. Also the software is known as "EX540". The program lies within System Utilities, more precisely Device Assistants. The most popular version among the software users is 0.0. This free program was originally developed by Curious Technology. We recommend checking the downloaded files with any free antivirus.
From the developer:
Extech Ex540 is a logging application for the device with the same name. It provides an accurate timestamp viewer and a graph chart where you can analyze the recorded data. The software is communicating through COM port, therefore you have to make sure the COM port is free and installed correctly.
You may want to check out more software, such as Right PDF printer, broadband medic or Faxtastic, which might be related to Extech Ex540.