NOYAFA NF-902 - Manual (Page 6)

3.1 Description for the information on LCD
After press power key to start the meter, the following
information will be shown on LCD:
(1)if the meter is supplied by battery, the icon at the left bottom
will be ON. With the reduce of electric amount of battery, the
display segment of battery becomes less and less till empty.
(2)When connect with AC adapter, a icon will be lightened at
the middle of screen, at the same time, the electric amount icon
is ON as well.
(3)At the left lower position, it is a icon. After start,
the Auto-off function is activated simultaneously and the icon is
lightened as well, but if there is no operation, the meter will be
shut down 15mins later.
(4)At the middle display-area of screen, the value of wavelength
will be displayed, the unit is nm.
(5)At right upper display-area of screen, shows reference
frequency value, the unit is Hz.
“Auto-off”
3. Handling instruction for NF-902 optical light source
Your excellent helper in cable test! 4