Test Function 19

Test function 19
Only the first two test functions are freely accessible. All further test functions are locked from the third test function. The lock can only be removed by means of test function 19. In test function 19, the display switches in intervals of 1 second from L_on to L_oFF (Lock on and Lock off). The test functions are unlocked or locked by pressing the left setting button (S/R for Set/Reset).