The CryoSecure Compressor Power Controller allows the operator to control the following time intervals:
- The “holding time” (4 selectable values) after an AC failure before allowing the Controller to go in the warming mode
- The “warmup time” (4 selectable values), which is the time the compressor is unpowered as the detector warms to room temperature
- The “cooling time with bias off” (16 selectable values), the Controller waits after restarting the compressor, before allowing reapplication of the detector bias voltage.
Once the desired time intervals are set, CryoSecure operates automatically under microprocessor control. Designed for worldwide use, CryoSecure operates with input from 100 V AC to 240 V AC, 47 to 63 Hz.
A rear-panel connector block incorporates a fuse holder and the input power connector. An international standard IEC power connector permits the use of power cords and plugs that meet local electrical standards. Output to the compressor, controlled by a solid-state relay, is provided via a mating rear-panel connector. The internal microprocessor-controlled circuit detects AC failure, measures its duration, and determines an appropriate response based on user settings. During the power failure, an internal battery supplies power to CryoSecure for continued operation (nominally 24 hours). Front-panel LED indicators allow monitoring of the controller status:
- AC Power: AC on, the battery is being charged, the cooler is operating normally.
- Holding: System is maintained on hold after a power failure.
- Warming: System is in a warmup mode.
- Bias OFF: Detector bias voltage is shut down.
- Mains Fail: AC power has been interrupted.
A front-panel, two-position rocker switch turns the power on or off and a push-button Initialize switch allows the user to select the sequence of operation.