Ametek Land 4200, Руководство пользователя

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Page 22
User Guide Model 4200 Dust & Opacity Monitor
8 Alignment
8.1 Preliminary Alignment
Correct installation and accurate alignment are essential if the Land Model 4200
is to function properly and meet its design specification.
Important
Ensure the air purge units, fans/airmovers are functioning and providing
purge air to the transmissometer and retro-reflector units before
installation begins.
To mount the transmissometer and retro-reflector heads, it is necessary to
remove the three M10 nuts (315.044) and spherical washers (703.022) from the
mounting studs, leaving the stack of disc springs (318.327) in place. Place the
mounting flange of the head onto the studs and replace the spherical washers
and M10 nuts. Tighten the nuts until the gap between the instrument flange and
the mounting flange is 13.5 ± 0.5mm (0.53in ± 0.02in). Do not over-tighten
the nuts as sufficient adjustment must be left in the disc springs to permit final
adjustment. The space between the instrument flange and the mounting flange
will be sealed with the rubber sealing ring provided, but until final alignment is
completed this should be left off.
Fig. 8-1
Key
1) 3 Studs Shown on 100.0PCD
4) Rubber Sealing Ring
2) Spherical Washers 5) M10 Nuts
3) Disc Spring Washers
Connect the transmissometer to the power supply and apply power.