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Appendix A Specifications 87
87
Camera Cooling
PI-SCX:1300: -30°C (forced air) to -35°C (water cooled at +25°C) thermoelectric (Peltier)
PI-SCX:4096: -50°C with +5°C water (≤1.5:1 fiber ratio); -45°C with +0°C water
(>1.5:1 fiber ratio)
PI-SCX:4300: -50°C with +5°C water
Passive Cooling: CCD array cooled by Peltier device. Heat is radiated away by
cooling fins on body of the round head camera.
Supplemental Air Cooling: The PI-SCX:1300 camera may have an internal fan that
draws air in from the vents in the camera shell, circulates it past the internal cooling fins,
and then exhausting the warmed air back into the atmosphere.
Water Cooling: Mixture of 50% ethylene glycol and 50% water pumped through
coolant ports at the side of the camera (PI-SCX:1300) or the rear of the camera
(PI-SCX:4096 and PI-SCX:4300).
Temperature Control
Setting Mechanism: Temperature is set by the application software.
Display: The actual temperature can be displayed at the computer by the application
software.
Control Precision: ±0.05°C; closed-loop stabilized-temperature control
Cooldown Temperature (typical): As long as the ambient temperature is between
+18°C and +23°C and the humidity is <50%, PI-SCX CCDs can typically be cooled
down to the following temperatures:
Camera
Cooldown Temperature
PI-SCX:1300
30°C with forced air
-35°C with water cooling (water at +25°C)
PI-SCX:4096
-50°C with +5°C circulating water for fiber ratio ≤ 1.5:1
-45°C with +0°C circulating water for fiber ratio >1.5:1
PI-SCX:4300
-50°C with +5°C circulating water
Table 8. Camera vs. Approximate Cooldown Temperature
If the ambient temperature is greater than +23°C, temperature lock may not be achievable
at the above temperatures
Gain
Software selectable (high, medium, low)