Site Requirements
47
Temperature
Humidity
Maintain proper humidity levels. High humidity levels cause galvanic
actions to occur between some dissimilar metals. This eventually causes a
high resistance between connections, leading to equipment failure.
Low humidity contributes to undesirably high levels of electrostatic
charges. This increases the electrostatic discharge (ESD) voltage potential.
ESD can cause component damage during servicing operations.
Low humidity levels are often the result of the facility heating system and
occur during the cold season. Most heating systems provide air with a low
humidity level, unless the system has a built-in humidifier.
Table 13. Temperature specifications
Temperature range type
Range
Recommended operating temperature range
21
°
to 24
°
C
70
°
to 75
°
F
Operating temperature
16
°
to 32
°
C
61
°
to 89
°
F
Nonoperating temperature range
–10
°
to +43
°
C
14
°
to 109
°
F
Shipping and storage temperature
(product packed in factory packing)
–25
°
to +60
°
C
–13
°
to +140
°
F
Temperature shock immunity
(maximum rate of temperature change)
10
°
C per hour
18
°
F per hour
Over-temperature warning
At 40
°
C
At 104
°
F
Over-temperature shutdown
At 60
°
C
At 140
°
F
