ROTRONIC MBW 973 - Manual (Page 42)

38 Exterior Cleaning
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 alcohol. Always follow the
use of these cleaning chemicals with water to ensure they are completely rinsed from the
mirror surface.
Reassemble the Mirror Components
Reassemble the mirror components in the reverse order of disassembly.
1. Install the optical assembly, taking note
of guide pin.
2.
3.
Replace the cover screw. Hand tighten
until snug. Do not over tighten.
Exterior Cleaning
Front Panel
The 973 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.
Guide Pin