Ergonomics - Hatteland JH 15T17 MMD series User Manual

General Installation Recommendations
- 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.
- The grounding screws of the units must be connected to the body of the ship (ground); the wire used should have a
cross sectional area of at least 6 mm 2 .
- 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.
Brightness knob precaution
Applies for models with potmeter knob. Please be aware of the risk of breaking or bending the brightness knob. The
brightness knob should be free of any obstruction.

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. The brightness of displays is limited. Sunlight passing directly through the bridge windows - or its reflection - which
falls upon the screen workplaces must be reduced by suitable means (negatively inclined window surfaces,
benetian blinds, distance from the windows, dark colouring of the deckhead). However, Series 1 can be offered
with optical enhanced 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).
6. For ECDIS applications, the minimum recommended viewing distance are as follows:
(IEC62288, Part 7.5 Screen resolution)
17 inch = 908mm 19 inch = 1011mm
Installation
IND100078-17
20 inch = 878mm 23 inch = 1011mm
17
27 inch = 1000mm
INB100036-1 (Rev 15)