Dell S2421HN User Manual

About your monitor | 19
Plug-and-play
You can install the monitor in any Plug-and-Play-compatible system. The monitor
automatically provides the computer system with its extended display identification
data (EDID) using display data channel (DDC) protocols so the computer can configure
itself and optimize the monitor settings. Most monitor installations are automatic;
you can select different settings if desired. For more information about changing the
monitor settings, see Operating the monitor.
LCD monitor quality and pixel policy
During the LCD monitor manufacturing process, it is not uncommon for one or more
pixels to become fixed in an unchanging state which are hard to see and do not affect
the display quality or usability. For more information on LCD Monitor Pixel Policy, see
Dell support site at: https://www.dell.com/pixelguidelines.
Ergonomics
CAUTION: Improper or prolonged usage of keyboard may result in injury.
CAUTION: Viewing the monitor screen for extended periods of time may
result in eye strain.
For comfort and efficiency, observe the following guidelines when setting up and using
your computer workstation:
• Position your computer so that the monitor and keyboard are directly in front of
you as you work. Special shelves are commercially available to help you correctly
position your keyboard.
• To reduce the risk of eye strain and neck/arm/back/shoulder pain from using the
monitor for long periods of time, we suggest you to:
1. Set the distance of the screen between 20 to 28 in. (50-70 cm) from your
eyes.
2. Blink frequently to moisten your eyes or wet your eyes with water after
prolonged usage of the monitor.
3. Take regular and frequent breaks for 20 minutes every two hours.
4. Look away from your monitor and gaze at a distant object at 20 feet away for
at least 20 seconds during the breaks.
5. Perform stretches to relieve tension in the neck, arm, back, and shoulders
during the breaks.
• Make sure that the monitor screen is at eye level or slightly lower when you are
sitting in front of the monitor.
• Adjust the tilt of the monitor, its contrast, and brightness settings.

Dell S2421HN Specifications

General

Pixel pitch	0.2745 x 0.2745 mm
Screen shape	Flat
Pixel density	92.56 ppi
Backlight type	LED
Display diagonal	23.8 \
Display technology	LCD
Native aspect ratio	16:9
Vertical scan range	48 - 75 Hz
Maximum refresh rate	75 Hz
Horizontal scan range	30 - 83 kHz
Supported video modes	480i, 480p, 576i, 576p, 720p, 1080i, 1080p
NTSC coverage (typical)	72 %
Viewable size, vertical	296.46 mm
Contrast ratio (typical)	1000:1
Display number of colors	16.78 million colors
Viewable size, horizontal	527.04 mm
Display brightness (typical)	250 cd/m²
Supported graphics resolutions	640 x 480 (VGA), 720 x 400, 800 x 600 (SVGA), 1024 x 768 (XGA), 1152 x 864 (XGA+), 1280 x 1024 (SXGA), 1600 x 900, 1920 x 1080 (HD 1080)
HDMI	Yes
Audio input	-
HDMI version	1.4
DisplayPorts quantity	0
Tilt angle range	-5 - 21 °
Panel mounting interface	100 x 100 mm
AC input voltage	100 - 230 V
Power supply type	Internal
AC input frequency	50 - 60 Hz
Energy efficiency scale	A to G
Power consumption (max)	21 W
Annual energy consumption	18 kWh
Power consumption (standby)	0.2 W
Power consumption (typical)	12.2 W
Operating altitude	0 - 5000 m
Non-operating altitude	0 - 12192 m
Storage temperature (T-T)	-20 - 60 °C
Operating temperature (T-T)	0 - 40 °C
Storage relative humidity (H-H)	5 - 90 %
Operating relative humidity (H-H)	10 - 80 %
Feet color	Gray
Product color	Black
Heavy metals free	Hg (mercury)
Market positioning	Business
Sustainability certificates	RoHS, ENERGY STAR
Cables included	AC, HDMI
Package depth	619 mm
Package width	134.87 mm
Package height	394.97 mm
Harmonized System (HS) code	85285210

Weight and Dimensions

Bezel width (top)	5.4 mm
Depth (with stand)	152.8 mm
Height (with stand)	412.8 mm
Weight (with stand)	3800 g
Bezel width (bottom)	20.7 mm
Depth (without stand)	53.8 mm
Width (without stand)	537.8 mm
Height (without stand)	322.6 mm
Weight (without stand)	3300 g