Metrohm 781 pH/Ion Meter - Manual (Page 134)

8.5 Diagnosis
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780/781 pH/Ion Meter, Manual
8.5 Diagnosis
The pH/Ion Meter is equipped with a diagnosis program. This allows
selective checks of the functions of individual assemblies.
The diagnosis can be carried out directly after the instrument has been
switched on by pressing and holding down the <9> key. Only those
tests that you can carry out yourself are described below; the other
functions are reserved for Metrohm Service personnel.
If one of the following tests is concluded with an error message, please
note it down and contact your local Metrohm agency.
You are expressly warned against triggering any other functions other
than those listed and documented below. Improper use can disturb
the correct functioning of the pH/Ion Meter and may render it unusa-
ble.
diagnose
├
RAM Initialization
├
RAM Test
├
AD-Converter Test
├
LCD Display Test
:
├
Key Test
:
RAM Initialization
Select: ACTMODE, MODES, SETUP, CONFIG,
ASSEMBLY, ALL
The initialization of the instrument memory can be a good idea if you
want to return parameter and configuration settings to their original
condition. This does not affect the instrument software itself, but only
the above selection of the corresponding user data. ACTMODE resets all
method parameters of the current measuring mode, MODES affects the
method parameters of all modes. With SETUP you can initialize the set-
up settings, with CONFIG all the configuration data will be reset. AS-
SEMBLY functions, which can only be accessed via remote control, are
reset here. The option ALL resets the whole instrument memory to its
original condition.
A memory initialization should only be triggered after careful consider-
ation! It will permanently delete all the affected user data which must
then be reentered manually.
When only certain configuration settings or method parameters are to
be reset to their default values then the manual version is more suita-
ble. Except for a few special cases, all the corresponding default values
can be set directly during input with the <CLEAR> key. In the other
cases you will find the default settings in this Manual in Sections 5 and
6.