TSI Instruments Aerotrak 9303 - To Use AC Power

General Maintenance–Model 9303 2-5
In l et Repla c e ment
Replace Optics block O-ring if is worn out or cracked.
On the new design of the
block and Inlet, the O-ring is
now located on the Inlet, not
in the block. If you have a new
design, use O-ring 1.5 x
10 mm for inlet O-ring.