346 firmware update
| 346 software | Latest version | Release date | Size | Download |
| Firmware | 2.2 | 2026-05-06 | 74 MB | model346.lsfw |
Firmware update process
The easiest way to update instrument firmware is online:
- Provide the instrument with an Internet connection using Wi-Fi or Ethernet
- Access the update screen (System settings > Update)
- The instrument will detect the latest firmware version, follow on-screen prompts to download and install the update
Updating an offline instrument is accomplished with the following steps:
- Click on the desired version number, which links to the .lsfw firmware update file.
- Copy or save the .lsfw file onto the root directory of a USB flash drive. Make sure it is the only .lsfw file in that location.
- Plug the flash drive into the USB-C port on the back of the instrument; if you don't have a newer flash drive with a USB-C connection, use the adapter supplied with the instrument.
- On the M81-SSM front panel, tap the Settings menu (top left corner of the screen). Then tap System settings. Touch Update.
- Click “Updates are available. Click here to install” and follow the on-screen instructions to update the firmware.
Note: Firmware comprises many files aggregated to form a Lake Shore firmware (.lsfw) package. The instrument stores versions of its .lsfw packages in its internal memory. This local memory location is called the “local repository.” This allows you to downgrade the firmware to older versions that remain on the instrument in the local repository.
346 Firmware Changelog
2.2.2026050409 — 26-05-06
Fixed
- General bug fixes