Mettler Toledo SevenGo Duo SG23 Mode D'emploi page 21

8 Instrument self-diagnosis
The instrument self-diagnosis requires user interaction.
a) Press and hold READ and CAL simultaneously until
The meter displays the pH screen first, allowing the user to check if the function keys are work-
ing properly.
b) When
Each time a key is pressed, an icon disappears from the display.
c) Continue to press the other keys until all the icons have disappeared.
When self-diagnosis has been successfully completed,
The system menu reappears.
Notes
●
The user must finish pressing all seven keys within two minutes, otherwise Err 1 ("Self-diagnosis
failed!") appears and the procedure has to be repeated.
●
If error messages repeatedly appear, contact METTLER TOLEDO Service.
pH/conductivity meter SG23
appears, press the seven function keys on the keypad one by one in any order.
Instrument self-diagnosis
appears.
appears.
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