Hach 51 Series User Manual page 14

Menu navigation
Pressing the "menu" button in the header bar calls the main menu. The
display is made of three columns:
• The left shows the menu options
• The center shows a tree view of the position inside the menu
structure
• The right has the following generic controls:
• Up - Return to previous menu (one step back)
• Main - Jump directly to main menu
• Close - Close the menu and go back to the measurement display.
• Help - Help topics concerning current menu
Virtual keyboard
When a value or text is to be edited a virtual keyboard will appear on screen and can be used like a
standard keyboard. Press CAP to access special keys. When input is complete press the Enter key
to confirm and exit the virtual keyboard. During editing, the edited field name is displayed along with
units where applicable.
Security menu
Note: When the instrument is started for the first time security is disabled. It is highly recommended that each user
be entered into the system and given appropriate access rights as soon as possible to avoid any unauthorized
access.
Configure security
Define access levels for all users . This requires a user access level 4.
1. Select Configuration from the Security menu.
Option
Access rights
Max session time
User action logging When enabled every action from a logged on user is recorded in a user log file.
User action log file
User management
Select Access table from the Security menu to show the list of registered users (a maximum of
99 users allowed). They are listed by name, ID, password and access level.
Pressing on an empty line or the Add button displays a window to add a new user. User name, ID,
password (minimum 4 characters) and access level (1 to 4) are required.
Pressing on a registered user displays a window for editing or deleting that user.
View menu
Numeric view
This is the default view. Display shows the numeric measurement value identified for each gas
measurement channel used, a graphic showing measurement value evolution during the set time
frame, and sample temperature. The display is refreshed after each measurement cycle ( based on
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Description
When enabled only registered users can access the menus. When disabled (default)
all menus are freely accessible and no ID is recorded against any action in the log file.
The user is logged out automatically when the time limit is reached.
The log file is a rolling buffer recording recent actions. Press Clear to empty the log
file.