Accurate installation of the mounting flanges onto the stack must be completed before the fine alignment and commission process can begin. Acoem Dynoptic offer an optional Laser Alignment Tool to make the alignment process simple, especially valuable when commissioning a system on a large diameter stack. The Laser alignment tool is attached to the monitors purge air body using the quick release clips, with the back removed it should be possible to look directly through the instrument and see the laser spot falling on the far side of the stack.
Air Purge Body Assembly and Alignment
In a standard assembly, as shown below, the Air Purge Body is fixed to the mounting flange with a thick, (red) rubber flange gasket in between. The angle of the head can then be adjusted by tightening the fixing nuts and compressing the flange gasket in an uneven manner. The laser alignment tool is used to get the head alignment to within ±1 degree of the final position, thereby simplifying the final active alignment stage.
With the laser alignment tool removed, the monitor can be attached to the purge air body in order to complete the final, active stage of the alignment process. The Acoem Dynoptic windows based utility software provides a simple interface to check the signal strength and gain settings. Making small incremental adjustments to the fixing nuts will optimise the monitor’s performance, stopping adjustments once the maximum signal strength has been achieved with minimum gain.
