Metrohm 827 pH lab User Manual download pdf (Page 22)

3.3 Operating principles

14 826/827 pH meter, Instructions for Use

3.3 Operating principles

3.3.1 Configuration and method parameters

Instrument configuration and parameters for the pH mode (no adjusta-

ble parameters are required for the measuring modes U (mV) and T

(°C)) are each contained in menus with a tree structure. These menu

structures are shown in the appendix in Section 9.2.

The instrument configuration of the pH meter is described in the menu

<< config >>. This contains the basic settings that apply for all mea-

suring modes. The parameters for the pH mode are stored in the menu

<< param >>.

The change from the measured value display to the menu display is

made by selecting the corresponding menu and confirming with the

<OK> key. The title of the submenu appears first, and is shown with

an '>' (e. g. >report). 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 <OK> and exited with <QUIT>. Altera-

tions to individual entries must be confirmed with <OK>. If such altera-

tions are exited with <QUIT> then they remain ineffective.

If an entry is confirmed with <OK> 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 <OK> 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 under configuration/print/print crit. are not vis-

ible when printing has been deactivated completely (off). If one of the

other printing criteria is selected then the particular settings it requires

will appear in the display.

3.3.2 Editing menu entries

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

Entries with a fixed selection are indicated by a colon:

print crit.: immed., time, drift, change, off

The selection is then made with the arrow keys and confirmed with

<OK>.

Entries which can be edited are altered by entering a new value and

confirming it with <OK>.

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 81 82

No comments

Metrohm 827 pH lab User Manual Page 22