RKI Instruments SM-2009U - Manual (Page 10)

6 • Air Filter & Sample Tubing
WARNING: Do not use an exhaust tube that is longer than 10 feet.
Using an exhaust tube longer than 10 feet will cause
inaccurate gas response by the GX-2009 during a bump
test or calibration.
Exhaust Tubing, 10 feet
Particle Filter for Air Inlet
Calibration Gas Sample Tubing, 3 feet
Figure 2: Air Filter & Sample Tubing