This chapter provides guidelines for adjusting your work surface to increase your comfort and safety. It also contains environmental specifications and regulatory statements. The following topics are covered.
The following topics are covered in this section:
The O2+ workstation conforms to several national and international specifications and European Directives listed on the “Manufacturer's Declaration of Conformity.” The CE mark insignia displayed on each device is an indication of conformity to the European requirements.
 | Caution: This product has several governmental and third-party approvals, licenses, and permits. Do not modify this product in any way that is not expressly approved by SGI. If you do, you may lose these approvals and your governmental agency authority to operate this device. |
The model number, or CMN number, for the O2+ workstation is on the system label underneath the workstation.
The “CE” symbol indicates compliance of the device to directives of the European Community. A “Declaration of Conformity” in accordance with the standards has been made and is available from SGI upon request.
This section provides the contents of electromagnetic emissions notices from various countries.
This equipment complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
This device may not cause harmful interference.
This device must accept any interference received, including interference that may cause undesired operation.
Note: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case you will be required to correct the interference at your own expense.
If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, you are encouraged to try to correct the interference by using one or more of the following methods:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment to an outlet on a circuit different from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
| Caution: Changes or modifications to the equipment not expressly approved by the party responsible for compliance could void your authority to operate the equipment. |
This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations.
Cet appareil numérique német pas de perturbations radioélectriques dépassant les normes applicables aux appareils numériques de Classe A préscrites dans le Règlement sur les interferences radioélectriques établi par le Ministère des Communications du Canada.
The O2+ workstation is FCC-compliant under test conditions that include the use of shielded cables between the server and its peripherals. Your workstation and any peripherals you purchase from SGI have shielded cables. Shielded cables reduce the possibility of interference with radio, television, and other devices. If you use any cables that are not from SGI, ensure that they are shielded. Telephone cables do not need to be shielded.
Optional monitor cables supplied with your workstation use additional filtering molded into the cable jacket to reduce radio frequency interference.
Always use the cable supplied with your system. If your monitor cable becomes damaged, obtain a replacement cable from SGI.
SGI designs and tests its products to be immune to the effects of electrostatic discharge (ESD). ESD is a source of electromagnetic interference and can cause problems ranging from data errors and lockups to permanent component damage.
It is important that you keep all the covers and doors, including the plastics, in place while you are operating the server system. The shielded cables that came with the server and its peripherals should be installed correctly, with all thumbscrews fastened securely.
An ESD wrist strap may be included with some products, such as memory or PCI upgrades. The wrist strap is used during the installation of these upgrades to prevent the flow of static electricity, and it should protect your system from ESD damage.
Read the following instructions carefully:
Follow all warnings and instructions marked on the product and noted in this and other documentation included with this product.
Unplug this product from the wall outlet before cleaning. Do not use liquid cleaners or aerosol cleaners. Use a damp cloth for cleaning.
Do not use this product near water.
Do not place this product or components of this product on an unstable cart, stand, or table. The product may fall, causing serious damage to the product.
Slots and openings of the workstation are provided for ventilation. To ensure reliable operation of the product and to protect it from overheating, these openings must not be blocked or covered. This product should never be placed near or over a radiator or heat register, or in a built-in installation unless proper ventilation is provided.
This product should be operated from the type of power indicated on the marking label. If you are not sure of the type of power available, consult your dealer or local power company.
Do not allow anything to rest on the power cord. Do not locate this product where persons will walk on the cord.
Never push objects of any kind into this product through cabinet slots as they may touch dangerous voltage points or short out parts that could result in a fire or electric shock. Never spill liquid of any kind on the product.
Do not attempt to service this product yourself except as noted in this guide. Opening or removing covers of node and switch internal components may expose you to dangerous voltage points or other risks. Refer all servicing to qualified service personnel.
Unplug this product from the wall outlet and refer servicing to qualified service personnel under the following conditions:
When the power cord or plug is damaged or frayed.
If liquid has been spilled into the product.
If the product has been exposed to rain or water.
If the product does not operate normally when the operating instructions are followed. Adjust only those controls that are covered by the operating instructions since improper adjustment of other controls may result in damage and will often require extensive work by a qualified technician to restore the product to normal condition.
If the product has been dropped or the cabinet has been damaged.
If the product exhibits a distinct change in performance, indicating a need for service.
Replace the lithium battery on the motherboard only with the same type or an equivalent type recommended by the manufacturer. Discard used batteries according to the manufacturer's instructions. There is a danger of explosion if the battery is incorrectly replaced.
Use only the proper type of power supply cord set (provided with the system) for this unit.
You can increase the comfort and safety of your work environment, and decrease your chances of repetitive strain injuries by following the guidelines given below. These guidelines help you create a healthy and productive work environment.
To browse through additional information on setting up your workstation area, taking frequent breaks, helpful exercises, and safe work habits, see Hardware Central . If your Web browser is not loaded, it takes a few seconds to load. (This option is not available if you are viewing this on a remote server.)
Table 6-1 shows recommended guidelines for furniture and system adjustment, as developed by American National Standards Institute (ANSI).[1]
Figure 6-4 illustrates the adjustment parameters shown in Table 6-1. Guidelines are shown for small females (standing height of 150 cm, or 59 in) and large males (standing height of 185 cm, or 73 in.). Midpoints are also interpolated for persons of average height.
Local Visual Display Terminal (VDT) guidelines issued by your country, state, or municipality may apply and supersede the guidelines in Table 6-1.
Table 6-1. ANSI/HFS 100-1988 Guidelines for VDT Workplace Adjustment
Adjustment | Small Female | Midpoint | Large Male |
|---|---|---|---|
Seat pan height | 40.6 cm (16.0 in) | 46.3 cm (18.2 in) | 52.0 cm (20.5 in) |
Work surface height (keyboard and mouse) | 58.5 cm (23.0 in) | 64.75 cm (25.5 in) | 71.0 cm (28.0 in) |
Screen viewing height | 103.1 cm (40.6 in) | 118.1 cm (46.5 in) | 133.1 cm (52.4 in) |
Screen viewing distance | >30.5 cm (>12 in) | >30.5 cm (>12 in) | >30.5 cm (>12 in) |
Screen viewing angle | 0-60 degrees | 0-60 degrees | 0-60 degrees |
If you work on a CAD system, you may feel more comfortable using the ranges of adjustment shown in Table 6-2.[2]
Table 6-2. Workstation Adjustments Preferred by CAD User
Adjustment | Mean | Range |
|---|---|---|
Seat pan height | 54 cm (21.3 in) | 50-57 cm (19.7-22.4 in) |
Work surface height | 73 cm (28.7 in) | 70-80 cm (27.6 -31.5 in) |
Monitor center above floor | 113 cm (44.5 in) | 107-115 cm (42.1-45.3 in) |
Screen viewing distance | 70 cm (27.6 in) | 59-78 cm (23.2-30.7 in) |
Work surface tilt | 8.6 degrees | 2-13 degrees |
Monitor tilt | -7.7 degrees | -15-1 degrees |
The negative monitor tilt shown is Table 6-2 indicates that the monitor is tilted forward (the top of the screen is tilted toward the user).
[1] American National Standard for Human Factors Engineering of Visual Display Terminal Workstations. ANSI/HFS 100-1988. Available from Human Factors Society, Inc., P.O. Box 1369, Santa Monica, CA, 90406, USA.
[2] Derived from Grandjean, Etienne. Ergonomics in computerized Offices. London: Taylor & Francis Ltd., 1987, p. 148.