EXFO FTB-1 - Manual (Page 25)

Safety Information
FTB-1 15
Electrical Safety Information
W
ARNING

Use only the listed and certified AC adapter/charger provided by
EXFO with your unit. It provides reinforced insulation between
primary and secondary, and is suitably rated for the country
where the unit is sold.

Use only accessories (such as the car outlet adapter, batteries,
and fiber inspection probe) designed for your unit and
approved by EXFO. For a complete list of accessories available
for your unit, refer to its technical specifications.

When you use the unit outdoors, ensure that it is protected
from liquids, dust, direct sunlight, precipitation, and full wind
pressure.