Installation; Cautions In Installing The Monitor - Hitachi EUB-5500 Technical Manual

Ultrasound diagnostic scanner
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6.3 Installation

6.3.1

Cautions in installing the monitor

Convergence of the color monitor is affected from external induction magnetic field. Avoid
installing the equipment in any region where induction magnetic field exists. Also observe
the following cautions to obtain stable performance for a long period of time.
(1) Ventilation
To obtain stable performance for a long period of time, keep temperature inside the
cabinet below 50ºC.
Especially fully ventilate in the vertical direction.
(2) Leakage magnetic field
Do not install the monitor in any region near the transformer, fan or the other leakage
magnetic field sources as far as possible.
causes fluctuation of images, and direct current magnetic flux (magnet or the like) causes
raster distortion or degradation of image color purity.
equipment in such environment, satisfy the following conditions.
That is, for the transformer, attach the shielding ring and shorting ring to minimize
leakage flux and design its winding of a balanced type.
transformer, use magnetic shielding or non-inductive winding to minimize leakage
magnetic flux.
more.
(3) Humidity
This monitor may be operated in a range of 10~90% relative humidity; however, it is
recommended to operate it in a range of 30~70% relative humidity since life of connecting
points of connectors, switches, variable resistors, etc. could become shorter.
(4) Ambient illumination
This monitor uses the black matrix tube showing excellent performance against glare or
reflection in a bright room.
However, to reduce fatigue of operator's eyes, install it so as to avoid any light source that
may directly illuminate the tube face of CRT.
(5) Dust
This monitor has been designed to minimize accumulation of dust; however, high static
electric field extracts dust through the ventilation holes of cabinet. Therefore, take care
to minimize dust around the monitor.
(6) Power supply voltage
This monitor is built in with the voltage stabilizer circuit, so images are not affected from
voltage fluctuation within the specification.
However, avoid operation exceeding ±10% to prevent excessive heat inside the monitor
and reduced life of the monitor.
Either of 50Hz and 60Hz can be used without modification of the equipment.
(7) Dust on CRT face
Applied high voltage has tendency to collect dust on the tube face of CRT, and it
deteriorates brightness and focusing quality.
Effect to the monitor may appear in a magnetic field of 0.01 Gauss or
6 - 4
Alternating current leakage magnetic flux
If it is necessary to install this
For devices other than the
L1E-EA0229

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