Metrohm 796 Titroprocessor - Manual (Page 263)

12 12. . Troubleshooting Troubleshooting
796 Titroprocessor, Instructions for use 257 257
12.2 Remedying storage errors
In some circumstances (voltage fluctuations in the power supply, etc.) it
may be necessary to clear the working memory or to re-initialize the com-
plete Titroprocessor memory.
12.2.1 Titroprocessor new start
A new start of the 796 Titroprocessor is triggered by the key combination
<с
с ><ALT><DEL>. This corresponds to the instrument switch-on process
( 'Power on').
12.2.2 RAM initialization (original initialization)
RAM initialization deletes all data in the 796 Titroprocessor and resets the
configuration data to the factory settings.
Save your methods and determination data as well as the configuration
settings on data cards or a personal computer (see page 37f) before you
carry out a RAM initialization!
The RAM initialization is triggered by holding down the space bar when
the instrument is switched on. Keep the space bar pressed down until
the display text appears.
The screen contrast now changes continuously from completely dark to
completely bright. Press any key when the text is easily legible. As soon as
the start procedure has been completed the main page will be shown and
the screen contrast can be finely tuned with the
<ALT><й й > and <ALT>
<к к > keys.
12.2.3 Clearing up memory errors in the data memory
The data memory areas of the 796 Titroprocessor are checked for data inte-
grity by means of a check-sum testing method.
If a serious memory error occurs during a determination or data storage
then this will be recognized the next time that the instrument is switched on
and a corresponding error message will be shown. The error can be reme-
died by a targeted deletion of the affected memory area.
Memory errors can be caused by e.g.:
• Switching off the Titroprocessor while a determination is being carried
out.
• Switching off the instrument during storage or loading procedures.
• Removing the data card while it is being accessed by the Titroprocessor.