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10.4. Cleaning
10.4.1. Cleaning the measuring window
When the measuring window gets fingerprints or dust on it, the reliability of the measured values is
impaired substantially. Check for dirt on the measuring window before use, and then clean it if it is dirty.
1) Blow off and dust on the measuring window with a blower.
2) Wrap lens cleaning paper around a thin stick such as a chopstick (or cotton swab) and wipe the lens
of the measuring window with a material moistened with alcohol.
! CAUTION
Use a thin stick that will not scratch glass lenses.
Wipe lightly from the center of the measuring window to the outside in a circular motion
Measuring window
Mire ring
10.4.2. Cleaning the mire ring
When the mire ring gets fingerprints or dust on it, the reliability of the measured values is impaired
substantially. Check for dirt on the mire ring before use, and then clean it if it is dirty.
1) If the mire ring and the cover get soiled, wipe the surface with dry cloth.
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