Using serial line, Keypad lock (keyguard), Menu pin lock – Vaisala MMT330 User Manual
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User's Guide _______________________________________________________________________
72 ___________________________________________________________________ M210764EN-F
Using Serial Line
Use the serial line command CON to view or set the display contrast.
CON [xxx]<cr>
where
xxx
= Contrast value for display. Recommended range -9 ... 9,
default 0. Negative values make screen lighter, positive
values make it darker.
Example (view current contrast setting):
>con
Contrast : 0
>
Example (set contrast to 5):
>con 5
Contrast : 5
>
Keypad Lock (Keyguard)
This function locks the keypad and prevents unintentional key presses.
1.
Keep pressing the left-hand function button for 4 seconds to lock
the keypad (at any display).
2.
To unlock the keypad, press the OPEN button for 4 seconds.
Menu PIN Lock
You can prevent unauthorized changes of the device settings by
activating the menu PIN lock. When this function is activated, the basic
display, graphical view, and device information displays are available,
but access to the menus is locked. The key symbol
indicates the
activation of this feature.
1.
Open the Main Menu
by pressing any of the ▲▼◄► arrow
buttons.
2.
Select System
, press the ►arrow button.
3.
Select Menu PIN, press the ON button.
4.
Enter a PIN code by using the ◄►arrow buttons. Press OK to
confirm the setting. Now the PIN lock is on and a key symbol is
shown in a display.
5.
Press EXIT to return to the basic display. Returning to the menu is
possible only by entering the correct PIN code.