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24 PI-MAX
®
4 System Manual Issue 4
1.4.1 Intensifier Modes and Safety
WinX Applications
The Experiment Setup
Main screen in WinX applications allows you to select one of two
intensifier modes:
Gate Mode or Safe Mode. In Gate Mode, the photocathode is biased on
only for the time that each gate pulse is applied. As a result, the tolerance to room light is
higher in gated operation, but the risk of damaging overload from intense light sources such
as lasers remains. In fact, intense light sources in gated experiments can cause spot damage
that would be undetected by the alarm circuit. In
Safe Mode, the photocathode is
continuously biased OFF and the intensifier is as safe as it can be.
LightField
In LightField, you can enable or disable the intensifier on the
Common Acquisition
Settings
expander. When the intensifier is enabled, the camera can be gated; when disabled,
the photocathode is continuously biased OFF and the intensifier is as safe as it can be.
NOTE:
In order for gating to occur, the I.I.T. switch on the back of the
PI-MAX4 must also be in the ON position.
1.4.2 Audible Alarm
NOTE:
It is normal for the alarm to sound briefly when the system is
initially turned on.
To reduce the risk of camera damage, the PI-MAX4 camera is equipped with an audible
alarm in the camera, activated when the intensity of light falling on the image intensifier
exceeds a preset threshold. While the alarm is sounding, the photocathode is disabled.
Immediately switch the
I.I.T. switch on the back of the PI-MAX4 to the OFF position. Cover
the camera window and only switch the
I.I.T. switch to ON after the illumination level has
been lowered. If the alarm sounds continuously even when the illumination level is
adequately low, shut the system down and contact the factory for guidance.
CAUTION!
!
Discontinue operation and contact the factory at once if
sporadic or continuous unwarranted alarms occur. They may
indicate intensifier damage or another situation that requires
immediate attention.