Ambient Temperature; Ambient Relative Humidity - Fujitsu ORACLE M10-1 Installation Manual

Table 2-4 Environmental conditions (continue d)
Item
Temperature
conditions
*1 No condensation is assumed regardless of temperature and humidity conditions.
*2 All the altitudes indicate heights above sea level.
*3 If the ambient temperature reaches the limit value, the system sends a warning notification and keeps
operating. If the temperature rises further, it executes controlled shutdown process.
2.5.1

Ambient temperature

To maintain system reliability and operator comfort, the optimal ambient temperature
is 21°C to 23°C (70°F to 74°F). This temperature range makes it easy to maintain the
relative humidity. While the system is operating within this range, even a failure of
the air conditioning facilities does not cause it to suddenly stop.
2.5.2

Ambient relative humidity

To process data safely, the optimal ambient relative humidity is 45% or higher but
less than 50%. The reasons for this are as follows:
A humidity in the optimum range can protect the system from corrosion issues
■
caused by high humidity
A humidity in the optimum range means that even a failure of the air conditioning
■
facilities does not cause the system to suddenly stop
A humidity in the optimum range can prevent failures and malfunctions caused
■
by electrostatic discharge
A relative humidity that is too low is conducive to generating a static electricity
discharge. The resulting intermittent interference may cause a failure or temporary
malfunction.
Electrostatic discharge is more likely to occur and harder to eliminate at locations
with a relative humidity below 35%. Electrostatic discharge becomes a critical issue
when the relative humidity falls below 30%. The set optimal relative humidity range
Fujitsu M10-1/SPARC M10-1 Installation Guide ･ March 2019
22
In operation
- When installed at 0 m to 500 m (0 ft.
to 1,640 ft.)
5˚C to 35˚C (41˚F to 95˚F)
- When installed at 500 m to 1,000 m
(1,644 ft. to 3,281 ft.)
5˚C to 33˚C (41˚F to 91.4˚F)
- When installed at 1,000 m to 1,500 m
(3,284 ft. to 4,921 ft.)
5˚C to 31˚C (41˚F to 87.8˚F)
- When installed at 1,500 m to 3,000 m
(4,925 ft. to 9,843 ft.)
5˚C to 29˚C (41˚F to 84.2˚F)
Not in operation Optimal
condition