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5. Operation
5．1 First, please correctly put the battery in unit.
Press"
"to turn on the unit，it will show the absolute or relative attenuation
value interface（draft 10） 。
When the battery is low or empty "
time. When the battery is not work, you could also insert the power supply
to power the whole unit. This icon "
use. The auto-shut down function is invalid if using the external power.
5．2 Connect it to the light source。
5.2.1 Take out the dust-proof cap and connect the light source。
5.2.2 Press"λ"key to select the wavelength。
5.2.3 Set2.5dB in draft 10 as the reference value。
Press"MENU/ENTER"to enter menu， Select"REF" via"▼"key，then
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F i b e r O p t i c S o l u t i o n s P r o v i d e r
Draft10
"， please take out and charge it on
" means the external power is under
10/15
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