Press and current setting will be displayed. The first digit will be flashing and is
ready for changing.
If you do not wish to change the first digit, press and the second digit will start
flashing.
Each time you press , the display will move to the subsequent digit, after the last
digit the display will return to the first digit.
To change the selected (flashing) digit, press repeatedly until the desired value is
displayed. Then press to access further digits and change them by .