Specifications  49 
Environmental specifications 
  
Feature  Specification 
Operating temperature 
10°C to 40°C (50°F to 104°F); UL-tested at 25°C 
(77°F) 
Nonoperating 
temperature 
-25°C to 55°C (-13°F to 131°F) 
Relative humidity  20% to 80%; noncondensing 
Operating altitude  Up to 2,000 m (6,600 ft) above sea level 
Nonoperating altitude  15,000 m (49,212 ft) above sea level 
Audible noise  Less than 45 dBA, normal operation 
Less than 50 dBA, on battery power 
 
 
REPO port specifications 
The REPO port meets the requirements of NFPA Articles 645-10 and 645-11 for a Disconnecting Means.