Lenovo ThinkSystem SN850 Setup Manual page 16

Table 3. Server Specifications (continued)
Specification
Environment
Acoustical noise emissions
1. Chassis is powered on.
2. A3 - Derate maximum allowable temperature 1°C/175 m above 950 m.
3. The minimum humidity level for class A3 is the higher (more moisture) of the -12°C dew point and the 8% relative
humidity. These intersect at approximately 25°C. Below this intersection (<25°C), the dew point (-12°C) represents
the minimum moisture level; above the intersection, relative humidity (8%) is the minimum.
4. Moisture levels lower than 0.5°C dew point, but not lower -10°C dew point or 8% relative humidity, can be
accepted if appropriate control measures are implemented to limit the generation of static electricity on personnel
and equipment in the data center. All personnel and mobile furnishings and equipment must be connected to
ground via an appropriate static control system. The following items are considered the minimum requirements:
a. Conductive materials (conductive flooring, conductive footwear on all personnel who go into the datacenter; all
mobile furnishings and equipment will be made of conductive or static dissipative materials).
ThinkSystem SN850 Compute Node Setup Guide
8
Description
The ThinkSystem SN850 compute node complies with ASHRAE Class A2
specifications. Depending on the hardware configuration, some models comply
with ASHRAE Class A3 specifications. System performance may be impacted
when operating temperature is outside ASHRAE A2 specification or fan failed
condition. The ThinkSystem SN850 compute node is supported in the following
environment:
• Air temperature:
– Operating:
– ASHRAE Class A2: 10°C to 35°C (50°F to 95°F); decrease the maximum
ambient temperature by 1°C for every 300 m (984 ft) increase in altitude
above 900 m (2,953 ft)
– ASHRAE Class A3: 5°C to 40°C (41°F to 104°F); decrease the maximum
ambient temperature by 1°C for every 175 m (574 ft) increase in altitude
above 900 m (2,953 ft)
– Compute node off: 5°C to 45°C (41°F to 113°F)
– Shipment/Storage: -40°C to 60°C (-40°F to 140°F)
• Maximum altitude: 3,050 m (10,000 ft)
• Relative Humidity (non-condensing):
– Operating:
– ASHRAE Class A2: 8% to 80%, maximum dew point: 21°C (70°F)
– ASHRAE Class A3: 8% to 85%, maximum dew point: 24°C (75°F)
– Shipment/Storage: 8% to 90%
• Particulate contamination
Attention: Airborne particulates and reactive gases acting alone or in
combination with other environmental factors such as humidity or temperature
might pose a risk to the server. For information about the limits for particulates
and gases, see "Particulate contamination" in ThinkSystem SN850 Compute
Node Maintenance Manual.
Note: The server is designed for standard data center environment and
recommended to be placed in industrial data center.
Notes:
• The declared acoustic noise level are based on specified configurations and
they may change depending on configuration/condition changes.
• The declared acoustic noise levels may increase greatly, if high-power
components are installed such as high-power NICs, high-power processors and
GPUs.