ROTRONIC HygroLog HL-NT - Manual (Page 32)

IN-E-HL-NT-V2_12
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
HygroLog HL-NT data logger:
instruction manual Instruction Manual
Document Type
Page 32 of 48
Document title
© 2009-2012; Rotronic AG IN-E-HL-NT-V2_12
IMPORTANT: Using the HW4 software, the display can be set to automatically go blank after a
specific time interval when there is no keypad activity and when there is no communication over
the UART interface. This serves the purpose of conserving battery power. The display comes up
again when any key is pressed or when a communication is initiated. See Software Functions,
Display Sleep function. HW4 is also required to configure the operation of the display backlight:
always off, always on, on key press (default setting).
Keypad
The keypad of the HygroLog HL-NT is comprised of the following keys:
● MENU: press this key to open the function menu, to go back one menu level or to exit the
menu.
● ENTER: this key has two functions:
If the function menu is not open, press this key to switch the display between showing the
measured values, date, time and probe number and showing the measured values and
calculated parameter (if HW4 was used to associate a calculated parameter with the probe).
If the function menu is open, press this key to select a menu item and/or to confirm a value or
setting.
● UP: the up-arrow key has two functions:
If the function menu is not open, the up-arrow key is used to switch the display between the
different probe inputs.
If the function menu is open, the up-arrow key is used to navigate the function menu and/or to
change the setting or value of a menu function.
● DOWN: the down-arrow key has a similar functionality as the up-arrow key:
IMPORTANT: the HW4 software can be used to disable either the MENU key or the entire
keypad. If the keypad does not work, you should check the configuration of the HygroLog HL-NT
with HW4. Disabling the MENU key prevents unauthorized changes to the configuration of the
HygroLog HL-NT and also prevents any probe adjustment. Compliance with FDA / GAMP
requires the MENU key to be disabled.