- Boot up your Mercury 130W ETR. You will see 1 displayed on the screen.
- Press VDMODE 3 times until you see “4” displayed on the screen (This is the Programming Mode)
- Enter the password for your device (default password is 0) and press TOTAL. Screen will display “1 0”.
- Press SH and + simultaneously and the first VAT will be displayed e.g. 1 14.00
- Enter the new rate, in this case 16.00 and press STL when you’re done
- Press TOTAL to end the operation.
If you get ERR 3 when trying to enter into programming mode print the daily Z report and return to the programming mode.