Hatteland Display 20 inch - HM 20T07 MIL-H - Manual (Page 15)

15
IND100078-23
General Installation Recommendations
Installation
Ergonomics
1. Adjust the unit height so that the top of the screen is at or below eye level. Your eyes should look slightly
downwards when viewing the middle of the screen.
2. Adjust screen inclination to remain gaze angle to the centre of the screen approximately perpendicular to the line of
gaze.
3. When products are to be operated both from a sitting position and from a standing position, a screen inclination of
about 30° to 40° (from a vertical plane) has turned out to be favourable.
4. Depending on solution, the units may be provided with optical bonding technology to reduce reflections and are
viewable in direct sun light, but as a general rule the units at the bridge wing area is recommended to be installed
or mounted by suitable alignment or bulkhead / deckhead mounting in such a way that reflections of light from the
front pane of the display are not directed into the observer’s viewing direction.
5. The use of ordinary commercial filter plates or filter films is not permitted for items of equipment that require
approval (by optical effects, “aids” of that kind can suppress small radar targets, for example).
General mounting instructions
1. The useful life of the components of all Electronics Units generally decreases with increasing ambient temperature;
it is therefore advisable to install such units in air-conditioned rooms. If there are no such facilities these rooms
must at least be dry, adequately ventilated and kept at a suitable temperature.
2. This device is cooled by air flowing across the rear cover and air flowing through the ventilation holes. The cooling
must not be impaired by partial covering of the unit or by installation of the unit in a confined cabinet.
3. Units which are to be used on the bridge wing must be installed inside the “wing control console” protected against
the weather. In order to avoid misting of the viewing screen, a 25 ... 50 W console-heating (power depending on the
volume) is recommended.
4. When selecting the site of a display unit, the maximum cable lengths have to be considered.
5. The impairment of read-out from a display screen by direct light from lamps or the sun must be avoided. Rear
windows must be blacked out by means of roller blinds or Venetian blinds.
6. Disturbing reflections on the screen of a display caused by pilot lamps and illuminated signs must be prevented by
suitable measures (screening or relocating).
7. When a product is being installed, the surface base or bulkhead must be checked to ensure that it is flat in order to
avoid twisting of the unit when the fixing screws are tightened, because such twisting would impair mechanical
functions. Any unevenness should be compensated for by means of spacing-washers.
8. Transportation damage, even if apparently insignificant at first glance, must immediately be examined and be
reported to the freight carrier. The moment of setting-to-work of the equipment is too late, not only for reporting the
damage but also for the supply of replacements.
9. The classification is only valid for approved mounting brackets provided by Hatteland Display. The unit shall be
mounted stand-alone without any devices or loose parts placed at or nearby the unit. Any other type of mounting
might require test and re-classification.
10. This Product shall be grounded to protective Earth. For AC Power cables this is done trough the ground wire in
the connector, for DC input the ground bolt shall be used. A shorter and thicker cable gives better grounding. A
6mm² is recommended, but a 4mm² or even 2.5mm² can be used for this purpose.