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26 • CRT Monitor Mounting Solutions Orderguide • rev.05/13/04 870-03-018
To obtain optimum performance from a workstation, consider the following topics during installation:
1. The adjustment range of the product.
2. The use-mode of the product…
a. Monitoring only?
b. Data entry?
c. User will be sitting?
d. User will be standing?
e. User will be sitting and standing at different times?
3. Vertical mounting height of the product in respect to user(s)…
a. Female or male only?
b. Female and male both?
c. Average height of users?
Vertical Positions — The vertical positioning data provided in this guide has been established to
optimize the human/machine interface when in the following work modes:
1. Sitting — Mounting of the computer workstation in a vertical position to optimize its use by
various size personnel when seated in a standard height chair. If the adjustment range of the
device is greater than the standard height variance for the range of users, this additional vertical
adjustment range can be used to “park” the monitor and/or keyboard out of the way, or provide an
increased range of adjustment.
2. Standing — Mounting the computer workstation in a vertical position to optimize its use by various
size personnel when standing. If the adjustment range of the device is greater than the standard
height variance for the range of users, any additional vertical adjustment range can be used to
“park” the monitor and/or keyboard out of the way, or provide an increased range of adjustment.
3. Sit-to-Stand — Mounting the computer workstation in a vertical position to optimize its use by
various size personnel when shifting between a sitting or standing position. Note that only the
12", 16" and N12 Arms have varying degrees of this capability.
Vertical Height Data — The vertical height data used in this guide is set forth in the following
tables and is based on scientific data. In this guide, we have chosen to utilize two primary criteria for
determining mounting height of our ergonomic computer workstations:
1. Eye Height — The following vertical height mounting tables are based upon the sound ergonomic
principal that for optimum viewing comfort and proper posture, the top of the CRT monitor screen
should be level with or slightly below the eye height of the user. This provides an approximate 15°
viewing angle to the center of the screen at a 20" viewing distance as shown in the figure below.
2. Elbow/Typing Height — Another important criteria for determining optimum mounting height of a
computer workstation is to provide optimum elbow or typing height for a range of operators.
Ergotron offers a variety of keyboard options: some have a fixed descent below the CRT monitor;
others provide both vertical and tray tilt adjustability. In all cases an attempt should be made to
provide an optimum vertical height relationship between the keyboard tray and the CRT screen.
20" Viewing
Distance
15°
30°
Appendix
Ergonomics Data