Princeton Instruments NIRvana-LN, User Manual, Page: 13 / 122

Chapter 1 About this Manual 13
1.6.1 Detector
Observe the following precautions when working with the Detector:
•
If the equipment is damaged, the protective grounding could be disconnected. Do
not
use damaged equipment until its safety has been verified by authorized
personnel. Disconnecting the protective earth terminal, inside or outside the
apparatus, or any tampering with its operation is also prohibited. Never impede
airflow through the equipment by obstructing the air vents. Allow at least one-inch
air space around any vent.
•
Prevent array saturation while data is not being acquired by completely closing the
entrance slit to the spectrometer (especially when a shutter is not used).
•
If LN-cooled detectors are operated under high humidity conditions, ice buildup could
occur around the pressure relief vent valve ports and prevent them from operating
properly.
1.6.2 Detector Window
WARNING!
Never remove the detector’s front window. It is part of the
vaccuum chamber and removing it will damage the array.
Operations requiring contact with the device can only be
performed at the factory.
Never operate the detector cooled without proper evacuation.
This could
destroy
the array!
This window maintains the vacuum in the detector and, for LN-cooled detectors, it
maintains the vacuum in the Dewar. The window is made of the highest quality quartz
available.
1.6.3 External Shutter
Observe the following precautions when working with an external shutter.
•
To prevent damage to the shutter or shutter drive circuitry, always turn the detector
power supply off before connecting or disconnecting the shutter cable.