Ametek Land 4500 MKIII, User Manual

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Opacity and Dust Monitor
User Guide
Model 4500 MkIII
B - 8
B4.4 Align the Transceiver
Transceiver Alignment Target
1 Observe the alignment target through the window (3). A bright green
spot (4) should be visible.
2 To move the green spot horizontally adjust M10 nut (1) on the air purge
flange and to move it vertically, adjust the M10 nuts (2), also on the air
purge flange as illustrated above. Adjust these nuts until the green spot
is inside the inner circle.
3 In bright sunshine the green spot on the alignment target may not
be visible. In this case return to the Retro-Reflector, undo the quick–
release clamps and swing open the rear cover. It should now be possible
to adjust the transmissometer until the bright circle of sunlight, visible
through the Retro-Reflector purge unit is centred on the target. Close
the Retro-Reflector again. If the green spot is visible, adjust the nuts
until it is central in the inner circle.
4 Ensure that the spring washers between the air purge flange and the
mounting flange are under moderate compression. If the compression
becomes excessive, it is likely that the third nut has been over
tightened or the mounting flange may not have been fitted accurately.
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