20
Optical Multi Meter
>2s PERM
17:57
1550nm
AUTO
-57.02
dBm
1.72 nW
Tone Freq
----
Battery energy detect has five levels:
remain 80%---100%
remain 60%---80%
remain 40%---60%
remain 20%---40%
remain less than 20%
if the energy is too low, the beep will be on and the device
will auto power off. If you plug in the AC adapter, it shows the
charging icon. It chargeable batteries inside, it starts to charge.
MENU
VFL
REF
ESC
ENTER
SAVE
SELECT
AUTOTEST
Battery energy detect
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