Metrohm 784 KFP Titrino - Manual (Page 103)

4.2 Diagnosis
784 KFP Titrino
100
4.2 Diagnosis
4.2.1 General
The KFP Titrino 784 is a very precise and reliable instrument. Thanks to its rugged construction it is
virtually impossible for external mechanical or electrical influences to have an adverse effect on its
functions.
Although the occasional fault in the instrument can not be excluded completely, it is certainly much
more likely that malfunctions are caused by wrong operation or handling or through improper con-
nections and operation with non-Metrohm instruments.
It is advisable in each case to isolate the fault with the rapid and easy to perform diagnostic tests.
The customer thus need not call METROHM service until there is a true fault in the instrument. In
addition, with the aid of the numbering in the diagnostic program he can provide the service engi-
neer with much more accurate information.
In inquiries always quote the manufacturing (page 5) and program number (see configuration,
page 11) and specify possible error displays.
4.2.2 Procedure
• The diagnostic steps must be performed in sequence and compared with the reactions of
the 784 KFP Titrino (indented). In the "yes" case, continue with the next instruction.
• If the instrument does not show the expected reaction ("no" case), the appropriate diagnostic
step must be repeated to exclude an operating error. With repeated wrong reactions, how-
ever, there is a strong possibility that a malfunction exists.
• The diagnostic steps allow re-entry into the test routine for repetition if the following display
appears:
diagnose press key 0...9
If the instrument is in a subprogram of the diagnostic routine: Press .
If need be, switch the power off then on again after a few seconds. At the same time press key
<9> until the above display appears.
• If has been pressed during the display of 'diagnose press key 0...9' , the
instrument returns to the user program.
• Error display: An error is shown in the display as follows:
error XX
error number
• If a fault causes the burette drive to stick at the top or bottom end of the cylinder, see
page 111, point 4.4 .