EXFO FG-750 - Manual (Page 260)

Maintenance
246 FG-750
Replacing the Air Filter
Replacing the Air Filter
There is one 62 x 62 mm filter located at the front of the unit.
This type of filter cannot be cleaned. You must replace it with a new one,
typically every 90 days (or after about 2000 hours) of operation. This
interval may vary, depending on the environment into which the unit is
operated. Dirty air filters can cause the unit’s internal temperature to rise.
W
ARNING
To avoid serious injuries as well as irreparable damages to your unit,
ALWAYS TURN OFF BOTH DISCONNECT DEVICES BEFORE OPENING
OR SERVICING THE UNIT.
C
AUTION
To avoid damaging your unit or its components, you should wear
an antistatic band during this maintenance operation. For more
information, see Preventing Electrostatic Discharge Damage on
page 23.
C
AUTION
Use only air filters designed for your unit and approved by EXFO.
You can purchase new filters from EXFO.
I
MPORTANT
Replacing the air filter at the recommended intervals may prolong
the life of the fan.