Land 4500 MKII Premier, Operation And Maintenance Manual

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Model 4500 Premier Dust and Opacity Monitor
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6 Position the Transceiver mounting flange with the “TOP” label in the 12 o'clock position and
tack weld the mounting flange in place.
Accurate positioning of the flange at this stage is critical to the operation of the instrument.
If the flange is not parallel to the stack wall it will be impossible to align the instrument
correctly.
7 Cut a hole around the Retro-Reflector pilot hole, large enough to allow eventual welding of the
outside of the flange stub to the stack wall. The mounting flange plate must be parallel to the
stack wall.
8 If the measuring path is short (under 2 m / 6.5 ft) and easily accessible the flanges can be
aligned using a straight piece of tube.
a Slide the tube through both flanges. Ensuring the specified flange-to-flange measuring
path is maintained to within ±1%.
b Tack weld the Retro-Reflector mounting flange in place.
cMake any necessary adjustments to the Transceiver mounting flange to ensure
alignment between the two flanges is maintained. Weld the flange permanently in place.
d Make any necessary adjustments and weld the Retro-Reflector mounting
flange permanently in place.
If the diameter of the stack is too large (over 2 m / 6.5 ft) to use an alignment tube, Land can
supply an optical flange alignment tool (Part number 702.787). Contact Land for more information.
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