16
The procedure for loading this file onto the TDR
150 is as follows.
1.
Copy the unlock file to a USB flash drive.
2.
Power off the meter.
3.
Insert the flash drive into the meter's USB port.
4.
Power up the meter.
If the upgrade is successful, the Startup screen (p.
9) will display the text "GPS/BT Upgrade OK".
After this, the GPS and Bluetooth options will be
available in the Settings Menu screen (p. 11). If the
upgrade is unsuccessful, the Startup screen will
display the text "Invalid GPS/BT Upgrade Key".
Confirm that the unlock key on the flash drive cor-
responds to the meter being upgraded.
