ROTRONIC MBW 373 - Manual (Page 48)

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Inspecting / Cleaning the Mirror
The mirror requires occasional periodic cleaning to maintain high accuracy measurements.
The flush mounted mirror is easily accessible by removing the cover screw and optical mirror
assembly. Look at the mirror with the naked eye or with a magnifying glass. If signs of
contamination are present, or suspected of being present, use the following procedure to
clean the mirror.
1. Clean the mirror with a clean cotton swab or lint free
tissue dampened with distilled water.
2. Follow with a dry cotton swab or tissue.
Although a clean mirror is important to accurate
measurements and sound measurement practices, please
take the following comments into consideration.
• Never attempt to polish the mirror. It is slightly roughened at the factory to allow for better
nucleation sites and thus better dew formation.
• If needed, the mirror may also be cleaned with methanol or alchohol. Always follow the
use of these cleaning chemicals with water to ensure they are completely rinsed form the
mirror surface.
Reassemble the Mirror Components
Reassemble the mirror components in the reverse order of disassembly.
On the LX model:
1. Install the optical assembly, taking note of the guide pin.
2. Reinstall the four hex retaining screws. Do not tighten yet.
3. Using the torque tool provided, evenly and uniformly tighten the hex screws to the proper
torque. You have reached the proper torque when the torque tool clicks. Do not
overtighten.
4. Replace the cover screw. Hand tighten until snug. Do not overtighten.
For all other models:
1.
Install the optical assembly, taking note of guide pins.
2. Replace the cover screw or retaining bar. Hand tighten until snug. Do not
overtighten.
Exterior Cleaning
Front Panel
The 373 front panel is completely sealed and easily cleaned with liquid glass cleaner or other
mild cleaning chemicals moistened on a cloth. Clean the front panel periodically as needed.
Rear Fan Grills
The rear fan grills may require cleaning periodically to ensure adequate airflow within the
system. Use compressed air to blow dirt and dust from the grill and from inside the system.