Metrohm 746 VA Trace Analyzer - Manual (Page 528)

7.3 Error messages
746 VA Trace Analyzer / 747 VA Stand
7-29
7.3.3 Instrument initialization
Certain errors can appear in the 746 VA Trace Analyzer which can be rectified only
by initializing the instrument (see ”Rectification” column of the error list in section
7.3.2). Three types of initialization are possible; these are called Normal Reset,
Reset with deletion of working storage and Overall initialization in what fol-
lows.
If an error appears which requires initialization of the instrument, your first step
should always be an attempt to restart the instrument with a Normal Reset.
If the instrument cannot be started properly and an error message appears during
the startup procedure or if errors occur with the method or determination loaded in
the working storage, a Reset with deletion of working storage should be per-
formed.
Perform an Overall initialization only if the instrument still refuses to function
properly. However, it is essential to note the following in this case:
• With an Overall initialization, all stored methods and determinations
are irrevocably cleared. Hence, always try to start the instrument with
one of the two other reset possibilities before an overall initialization
and save the contents of the method memory and the determination
memory on a data card.
• To avoid unnecessary data losses should an overall initialization be-
come necessary, you should save all important methods and data at
regular intervals by storing them on a data card or, via the RS232 in-
terface, on a PC.
Normal Reset
Hardware reset and internal software reset.
The instrument is reinitialized, but all instrument parameters, the data loaded in the
method and determination storage as well as the method and determination loaded
in the working storage are retained.
This type of instrument initialization runs automatically each time the 746 VA Trace
Analyzer is switched on.
There are three possibilities to initiate a reset:
• Switching the instrument off and on
• Pressing the Reset button 15 15 at the rear of the
746 VA Trace Analyzer
• Pressing the key when the instrument is on
standby ( * READY * ), followed by the key.
The instrument is then powered up and the ”MONITORING” page appears.