Metrohm 796 Titroprocessor - Manual (Page 266)

13.1 Diagnosis
796 Titroprocessor, Instructions for use 260 260
13 Appendix
13.1 Diagnosis
13.1.1 General
The 796 Titroprocessor is a very precise and dependable instrument.
Thanks to its rugged construction, it is highly unlikely that external mechani-
cal or electrical influences will have any adverse effect on its functions.
Although a fault in the instrument can not be excluded with certainty, the
possibility is greater that malfunctions are caused by wrong operation or
handling, through improper connections and the operation with third-party
devices.
Whatever the case, it is always advisable to localise the fault with the diag-
nostic tests, which can be performed quickly and simply. The customer
need call Metrohm service only when the instrument really has a fault. Fur-
ther, he can use the results of the specific diagnostic function to provide the
service engineer with much more precise information.
In the case of inquiries, always quote the serial number on model plate (see
Figure, page 4), the program version (see configuration, page 34) and if ap-
plicable the error message.
Procedure Procedure
The diagnostic menu listed in section 13.1.2 13.1.2 shows all components for
which detailed instructions (diagnostic steps) are available for checking the
functionality.
In the case of a possible malfunction, we advise you to perform either the
corresponding diagnostic step or all diagnostic steps as a routine check on
the instrument.
The reactions of the instruments to the instructions must be compared with
the descriptions in the diagnostic step. If the instruments do not show the
expected reaction ("No" case), the appropriate diagnostic step must be re-
peated to exclude operating errors. However, it is highly probable that re-
peated wrong reactions indicate a malfunction.
Equipment required: Equipment required:
3.496.8510 test plug to check the Remote interface
3.496.8480 test plug to check the RS 232 interface
3.496.8570 test plug to check the Barcode interface
1.767.0010 simulator to check the analog inputs