MBW 473-RP2, Руководство по эксплуатации и обслуживанию

Страница: 62 / 75

56 MBW 473 Manual English V5.0
8.2 Mirror Cleaning
At the heart of the 473 is the measuring head assembly. It is highly sensitive and accurate, yet easily
accessible for periodic mirror cleaning. To ensure high accuracy, the mirror should be cleaned before
starting a measurement. Inspect the mirror carefully. Use a magnifying glass, if necessary. If there are
signs of contamination or if you suspect that contamination is present, use the following procedure to
clean the mirror.
SH2 / SH3 / SHX Measuring Head
To access the mirror and the opto-electronic compo-
nents, remove the measuring head cover.
The cover looks like a large, tan-colored knurled knob.
To remove it, simply turn it counterclockwise. It re-
quires approximately three full turns to completely
unscrew it.
Once the screw cover has been removed, remove the
black optical module by pulling it straight towards you.
The loose half is the optical module containing the
light emitting and light sensing opto-electronic ele-
ments and the gold contacts. The other half contains
the mirror, temperature sensor, and some mating gold
contacts. Avoid touching the mirror and gold contacts
with your fingers to prevent contamination.
Clean the mirror with a clean cotton swab or a lint free
tissue.
Never attempt to polish the mirror.
If necessary clean the mirror with metha-
nol or similar alcohol. Then clean the
mirror with distilled water to ensure the
cleaning chemicals are completely re-
moved from the mirror surface.