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4 operating principles, 1 configuration and method parameters, 2 editing menu entries – Metrohm 781 pH/Ion Meter User Manual

Page 48: Operating principles, Configuration and method parameters, Editing menu entries, D 4.4

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4.4 Operating principles

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780/781 pH/Ion Meter, Manual

4.4

Operating principles

4.4.1

Configuration and method parameters

Instrument configuration and method parameters are each contained in

menus with a tree structure. These menu structures are shown in the

Annex in Section 9.3.
The instrument configuration of the pH/Ion Meter is described in the

CONFIG menu. This contains the basic settings that apply for all the

selected working modes and methods. The method parameters are

stored under PARAMETERS. In contrast to the configuration, the meth-

od parameters depend on the measuring mode which has been set.
The change from the measured value display to the menu display is

made by using the or keys. The title of the

submenu appears first, and is shown with an '>' (e.g. >Measuring

parameters). You can now move the selection bar up and down with

the <> and <> arrow keys. Each underlying level in the menu

structure is opened with and exited with . Altera-

tions to individual entries must be confirmed with . If such al-

terations are exited with then they remain ineffective.
If an entry is confirmed with then the selection bar will move

to the next entry. At the end of a submenu it will finally change to the

next point of the superior menu selection.
In this way you can run through the complete menu structure for the

configuration and parameters by repeatedly pressing the

key. This can be helpful when carrying out checks.
Not all parts of the menu structure described below are visible in the

display at all times. Only the specific possible settings of the option

which is currently activated are shown. For example, the various set-

tings for printing out the measured values under

CONFIG/print meas.

values/print crit.

are not visible when printing has been deac-

tivated completely (OFF). If one of the other printing criteria is selected

then the particular settings it requires will appear in the display.

4.4.2

Editing menu entries

A basic differentiation is made between two types of menu entry.

Entries with a fixed selection are indicated by a colon:

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The selection is then made with the