Advantech PPC-100 Manual page 79

Load regulation: The load regulation for + 5V, + 12V, is less than ± 3%;
for -12V, it is less than ±5%. Measuring is performed by changing the
measured output load +40% from 60% rated load, and keeping other
outputs at 60% rated load.
Environmental Specifications:
Temperature range:
Operating: 0° C to 50° C
Storage: -20° C to 85° C
Altitude: 0 - 10000 ft.
Relative humidity: 5% to 95%, non-condensing
74 PPC-100 User's Manual