TEST PROGRAM - TEST OF LCD DISPLAY D3
10. Press "1" again, the display becomes
11. Press "1" again, the display becomes
12.Press "1" again, nothing is displayed
13. Press "1" again, all symbols are displayed
14. Press "1" again, Program version number is displayed
Note: It is also possible to proceed with above tests in reverse sequence by pressing key "2"
instead of key "1".