Montana Instruments Cryostation s Series - Sample Chamber Windows and Wiring

Cryostation® s-series
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4.4 Windows
4.4.1 Window Covers
The sample chamber has five (s50 and s100) or eight (s200) optical access locations. The system ships
with window covers in place. The window covers are removed by turning counter-clockwise until the
notches are aligned with the openings in the window retaining ring. To replace the covers, re-align the
notches and turn clockwise until the cover locks in place.
» NOTE
If the system is running, use care when removing the window covers, as this may loosen the retaining
ring holding the window in place.
4.4.2 Window Removal
For replacing outer vacuum windows, a special window tool is provided in the accessory kit:
1. Use the window tool to loosen the retaining ring by turning counter-clockwise.
2. Remove the retaining ring to access the window.
NOTICE
Take care when handling and removing windows
• Handle the radiation shield and windows carefully in order to prevent scratches or fingerprints.
• Before using the window tool, remove the housing from the system.
• Keep the O-rings clean and free of debris. Check O-rings prior to reinstalling windows.
Removing window covers
Window tool
Unscrewing window retaining
ring
Radiation shield threaded
window
The inner (cold) windows on the radiation shield are held in place with a tension ring. Depending on the
model, the radiation window holders are removed by unscrewing the threaded tension ring or removing
the four M2 screws surrounding the window. The threaded holders can be adjusted to allow the sample
to be positioned closer to external optics. Always be sure no portion of the radiation shield touches the
outer housing.
» NOTE
If a radiation window is removed, the added heat load can be as much as 50 – 100 mW per window.
Depending upon the emissivity and thermal conductivity of the sample, local heating of the sample
from this excessive radiation can cause the sample to be several degrees warmer than the cold
platform it is mounted to.