Updating the firmware of your GT Series soldering station helps ensure your system is operating at peak performance.

To update your system’s firmware, follow these 9 simple steps:

STEP 1: Download the latest firmware .zip for the GT120 or GT90 from the Metcal website.

NOTE: There are two versions of the firmware. Be sure to download the correct version for your GT system: GT120 | GT90

STEP 2: Extract the contents of the .zip file. You will find an instruction document and a folder containing the firmware image (.hex).

STEP 3: Transfer the firmware image to the top folder of an external USB drive.

STEP 4: Power down the GT station via the rear panel power switch.

STEP 5: Plug the external drive into the USB port in the back of the GT station (Figure 1).

Figure 1: Power Switch & USB Port
Figure 1: Power Switch & USB Port

STEP 6: Press and hold the “Menu” and “⮠  ”   buttons simultaneously while switching the power switch ON.  Continue to hold the “Menu” and “⮠  ”  buttons for 3 seconds, then release.  The screen should remain dark for about 10 to 15 seconds. The unit will reset once the software is loaded successfully.

NOTE: The display may show a high contrast. Once the EEPROM is reset and the unit power cycled, the display will be reset properly.

STEP 7: Verify the firmware version by observing the startup page. The model and firmware version will be displayed for a few seconds before transitioning to the home status screen.

STEP 8: Clear the system memory settings (Resetting the EEPROM).

    1. Press and hold ▼▲ buttons simultaneously while switching the power switch ON.
    2. When the screen below is displayed (Figure 2), press and release the “Menu” and “⮠  ”   buttons simultaneously.
Figure 2: EEPROM Confirmation Screen

STEP 9: Power cycle the unit as a final step to restore proper default settings.

That’s it. The firmware upgrade is complete! Your GT Series station will now perform with the latest system upgrades.

If you have any problems with this process or any questions, please contact Metcal.

GT Series Resources

GT120 Data Sheet | GT90 Data Sheet | GT120 and GT90 Quick Start Guide

GT Series Cartridges & Tips Guide

GT Series Frequently Asked Questions | GT Series Training Videos