The workstation is a common name for a job in the electronic data processing (EDP). It consists the interface man-machine, as well as optional file elements of screen, keyboard and a software, like e.g. Telephone, workbench and direct working environment. There are workstations at present within all offices and ranges from administrations.

Optical-visual factors

Tuning of ergonomically relevant factors of influence require consideration of optical-visual criteria, so that compatibility with the various achievement functions exists (adaptation, accommodation and fixation, visual acuity, perception depth and - time).

During positive representation (darken indications on bright reason) time-afflicted and loading adaptation procedures of the eye develop. These are hardly necessary with the view of the screen of manuscript in consequence of the adjustment of the shining densities of screen and storage medium paper. Here small contrast is sufficient.

Bright one of workstations are more favorable (apart from dark areas) regarding glare, since reflections or sources of interfering light on bright background are reflected less. Indication sharpness lacking in the lateral face field leads to headache, as well as watering and burning eyes. The field rate should be larger than the flicker fusion frequency (~50Hz).

Equipment attitude

Regarding reflection glares the matte surfaces are favourable. Lateral daylight idea in the area serves for it dazzling effects and contrast reduction to avoid. With color screens with maximally 5 foreground colors should being done without to red and blue Spektralfarben lying in the frontier such as, since the eye is sensitive here to few and these colors sharply to be seen not simultaneous to be able, so that accommodation is additionally demanded (Akkomodationsdifferenzen due to chromatic aberration).

Room lighting and distance

An absolute value for a good lighting cannot be indicated. With the organization of good lighting conditions the following points consideration should find:

• appropriate density of light
• Uniformity of the lighting (harmonious luminous intensity distribution)
• Delimitation of the glare
• Contrast
• Light direction
• Shade
• Color of light
• Color reproduction

A great importance for the evaluation of the lighting has the density of light (density of light The density of light should be the higher, the more difficult the Sehaufgabe is. In order to show contrasts correctly, as even a density of light as possible must prevail in the work area. In the DIN 5035 the nominal densities of light necessary for certain Sehaufgaben are fixed. The nominal density of light participates defined as the recommended local and temporal average value of the density of light and refers to the middle aging condition of the lighting system.

For general lighting purposes the light direction should run parallel to the line of sight. Interior lighting with daylight takes place via windows. These have the important task apart from the lighting still to make a line of sight connection between job and external world. Since the daylight large is subjected daily and to seasonal fluctuations, one introduced the so-called daylight quotient for the evaluation of daylight. The daylight drops in particular in deep areas to the depth steeply.

The spatial arrangement is to ensure the maximum discharge of the Akkomodationsapparates. The recommended distance of the screen would be therefore for instance 50cm, with humans starting from 50 years about 70-80cm.

Related links

• Ergonomics catalog: Workstation/office workstation catalog over ergonomic furniture, information to the ergonomics, specialist dealer and producer list

See also: Ergonomics

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