Teledyne PIXIS-XF, Системное руководство

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46 PIXIS-XF System Manual Issue 5
5.4.3 CCD Temperature
As stated before, lowering the temperature of the CCD will generally enhance the
quality of the acquired signal.
• When WinX/32 is the controlling software, temperature control is done via the
Detector Temperature dialog accessed from the Setup menu. See
Figure 5-7 .
• When LightField is being used, temperature control is done on the Sensor
expander.
Figure 5-7: Typical WinX Detector Temperature Dialog
Once the target array temperature {Temperature Setpoint} has been set, the software
controls the camera's cooling circuits to reach set array temperature. On reaching that
temperature, the control loop locks to that temperature for stable and reproducible
performance. When temperature lock has been reached (temperature within 0.05°C of
set value), the current temperature is Locked. The on-screen indication allows easy
verification of temperature lock.
The time required to achieve lock can vary over a considerable range, depending on
such factors as the camera type, CCD array type, ambient temperature, etc. Once lock
occurs, it is okay to begin focusing. However, you should wait an additional twenty
minutes before taking quantitative data so that the system has time to achieve optimum
thermal stability.
The deepest operating temperature for a system depends on the CCD array size and
packaging. Refer to
Table A-2, Typical Deepest Operating Temperature , on page 91 for
complete information.
NOTES:
1. The time to reach temperature lock is affected by CCD
array size and the ambient temperature. Typically, the
larger the array or the warmer the ambient temperature,
the longer the time to reach lock. If the ambient
temperature is greater than +20°C, temperature lock
may not be achievable at the lowest specified
temperature for your camera. Temperature regulation
may not reach its ultimate stability for at least 30
minutes after lock is established.
2. In WinX, the Detector Temperature dialog will not
display temperature information while you are acquiring
data.
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