Instructions

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3
HD21ABE
1. Backlit graphic display.
2. ESC key: It allows to exit from the menu or, in case of a submenu, to exit from the current level
display.
3. Navigation key ▲: It allows navigation through the menus. During normal operation, it is used
to select the resetting of the statistical data and to scroll the displayed quantities upwards.
4. Navigation key ◄/Func: It allows navigation through the menus. In normal view, it allows to
display the statistical data: maximum, minimum, and average.
5. MEM key: It allows to start and end the recording of data (logging).
6. Navigation key ▼: It allows navigation through the menus. During normal operation, it is used
to cancel the resetting of the statistical data and to scroll the displayed quantities downwards.
7. MENU key: It allows to enter and exit the instrument’s functioning parameter setting menu.
8. Navigation key ►/ Unit: It allows navigation through the menus. During normal operation, it
changes the unit of measurement of the displayed main quantity.
9. ENTER key: In the menu, it confirms the data entered. In normal view, it allows to reset the
statistical data.
10. ON/OFF-Auto Off key: It turns the instrument on and off. When pressed together with the
ESC key, it disables the automatic turn off.
11. USB serial port (mini-USB connector).
12. Power supply input.