Acoem Dynoptic emission monitor alignment

Acoem Dynoptic – accurate monitor alignment

Ensuring accurate monitor alignment across the stack is a critical part of the process when installing and commissioning an Acoem Dynoptic emission monitor. Our single pass monitoring systems consist of a transmitter head (TX) that emits a narrow optical beam of light, to achieve a strong measurable signal, this beam must align with the receiver head (RX) on the opposite side of the stack.

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.

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.

If you require support commissioning our monitors, or if you would like more information about our Opacity, Dust and Particulate emission monitors please contact us directly.

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