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7. STORAGE AND MAINTENANCE
WARNING!
If NVS-33 has been stored for a long time at
temperature lower than -40C (-40F), then prior
to using the device must be kept at an ambient
temperature of -10C (14F) to +40C (104F)
with humidity below 80%.
NVS-33 is a sophisticated precise optical instrument
equipped with electronics. It should be handled with due
care:
Unit contains fragile components and sensitive optics.
Avoid impacts, dust, moisture and sharp changes of
temperature.
Do not touch the optical surfaces other than for
cleaning. Doing so may damage the anti-reflection
coating.
Clean optical surfaces with professional lens cleaning
supplies.
Use only soft clean cloth to clean the exterior of the
device.