GE Carestation 620, User'S Reference Manual, Page: 221 / 268

Environmental requirements
.
Operation Storage and Transport
Temperature 10 to 40°C
Oxygen cell 10 to 40°C -25 to 60°C
Oxygen cell storage is -15 to 50°C, 10 to 95% RH
LCD display storage is -20 to 60°C
Humidity 15 to 95% RH, non-condensing 15 to 95% RH, non-condensing
Altitude (with airway
module) 500 to 800 mmHg
(3565 to -440 meters) 425 to 800 mmHg
(4880 to -440 meters)
Altitude (without airway
module) 475 to 800 mmHg
(4000 to -440 meters) 425 to 800 mmHg
(4880 to -440 meters)
Do not operate the machine, or apply mains power, when the system
is outside the specified operational temperature range and specified
operational humidity. If the device is colder or warmer than the
specified operating temperature, or if condensed water is visible or
suspected, let the temperature stabilize before use. Note
11 Specifications and theory of operation
2076152-001
11-19