Metrohm 788 IC Filtration Sample Processor - Manual (Page 152)

6 Appendix
788 IC Filtration Sample Processor
144
diagnosis
>display contrast test
x <ENTER>
After pressing the <ENTER> key the following display appears whereby the contrast of the dis-
play continuously varies between bright and dark.
>display contrast test
788 IC Filtr. Processor
x The test can be exited with the <QUIT> or <STOP> key.
diagnosis
>key test
6.4.5 Keyboard
This diagnosis step allows all the keys on the keyboard to be tested for
their functionality.
x Prepare instrument for diagnosis (see section 6.4.2).
x If necessary, press <Ð> several times until
diagnosis
>key test
x <ENTER>
>key test
x Activate all the keys one after the other and check their reaction on
the display.
The corresponding matrix code appears in the display and a description of the main function of
the key pressed (for example, the following display should appear when the <CONFIG> key is
pressed).
>key test
code 4 CONFIG
x The test is exited by pressing the <STOP> key twice.
diagnosis
>remote test