Metrohm 840 PC Control 5.0 / Touch Control - Manual (Page 316)

5.3 Maintenance
304
PC Control / Touch Control
5.3.2 RAM initialization (RAM Init, Touch Control only)
In very rare cases excessive interference could affect the functions of
the processor and cause a program crash. In this case the RAM sector
must be initialized. RAM initialization is also the only way of making the
system accessible again if it is impossible for a user to log in because,
for example, even the Administrator has forgotten the password or no
Administrator has been defined (see Section 3.7.5).
Attention!
If you carry out a RAM initialization (RAM Init) then all user data
will be lost. The contents of the internal memory will be deleted. The
system will return to the "factory settings". An additionally installed
language continues to exist.
Note!
You should make a backup at regular intervals in order to avoid
data loss. For the Touch Control we recommend – depending on how
frequently you alter methods or system settings – making a backup
every week to every month. For the PC Control software the period
should be in accordance with that usually used for data security
backups in your company.
For RAM initialization proceed as follows:
Switch off the Touch Control with the ON/OFF switch 11.
Switch on the Touch Control again with the ON/OFF switch 11
while keeping the contrast controller 14 pressed down. You can
release the contrast controller when you hear an acoustic signal
(beep).
To confirm the RAM initialization press the contrast controller
twice.
The RAM will be checked and initialized.
If you do not confirm the RAM initialization within 10 seconds of hearing
the acoustic signal the process will be stopped and the Touch Control
will be switched on without a RAM initialization.