Teledyne LGA-3500 - Laser Gas Analysis system - Manual (Page 30)

Installation Model 3500
Teledyne Analytical Instruments 16
3. Loosen the mounting nut, rotate the laser pen around and tighten
the mounting nut again. Record the new light spot.
The trace of light spot on the target forms a circle. If the diameter
is less than 1/600 of the distance between the laser pen and the scaled
target, then the coaxial degree of the pen is adequate. Otherwise, please
contact our technical support center. See Figure 3.4.
3.3.3.2 A DJUSTING THE C OAXIAL O FFSET OF THE I NSTRUMENT F LANGES
To adjust the coaxial offset of the two installed instrument flanges
use the following procedure:
a. Tighten the laser pen on one of the instrument flanges with a
mounting nut. Install the scaled target on the other instrument
flange. Turn on the laser pen and check whether the light spot
is on the center of the scaled target. If not, adjust (tighten or
loosen) the 4 M16 bolts on the instrument flange where the
laser pen is mounted until the light spot is at the center of the
target. See Figure 3.4.
Figure 3.4 Adjusting the Instrument Flanges with Laser Pen and
Target.
4. Switch the laser pen with the scaled target, and redo step 1.
5. Redo step 2 repeatedly until the light spot is always at the center
of the scaled target without any adjustment.
6. Keep the laser pen on, tighten the 4 fastening screws on the
instrument flange where the laser pen is mounted, and keep an
eye on the light spot on the scaled target. If it moves, repeat steps
1, 2, and 3 until the light spot does not move.