Metrohm 711 Liquino - Manual (Page 159)

6. Appendix
711 Liquino, Instructions for use 153
6.5.6 Check display contrast
This diagnosis step allows the contrast setting variability function to be
checked.
•
Prepare instrument for diagnosis (see Sect. 6.5.3).
• If necessary press key <9> several times until

di agnosi s
>di spl ay cont r ast t est
•
 After pressing the key the following display appears con-
tinuously with changing contrast settings for an optical check of the
display.

>di spl ay cont r ast t est
• The test is exited by pressing the key.

di agnosi s
>key t est
6.5.7 Check keyboard
This diagnosis step allows the functioning of all the keyboard keys to be
checked.
•
Prepare instrument for diagnosis (see Sect. 6.5.3).
• If necessary press key <9> several times until

di agnosi s
>key t est
•

>key t est
• Press all keys in sequence and observe the reaction on the display
with the help of the following keyboard matrix.
Fig. 1 Keyboard matrix
 The corresponding matrix code for the pressed-down key appears in the
display. The matrix code can be seen from the keyboard matrix along-
side.
 For example, when the key is pressed the following display
must appear:
>key t est
KEY: 31 CONFI G
• The test is exited by pressing the key twice.

di agnosi s
>r emot e t est