6.18 Retrace time
Horizontal ：2.2us
Vertical ：500us
6.19 Luminance uniformity
Measure the luminance of corners and center while display full white pattern. The luminance uniformity must be no
less than 75% when calculated by the formula：
100%
center of luminance
cornerlowest of luminance the
×
6.20 Arc-over protection
The CRT and associated circuitry shall be protected against arc-over from the anode and any of the CRT electrodes
except heater. The performance of the arc-over protection circuitry and the adequate ground shall be evaluated by
arcing test fixture discharge to the cathode of the CRT 50 times. This shall not result in any permanent damage.
7.0 ENVIRONMENTAL REQUIREMENTS
The monitor shall be operated reliably within the following operating condition and may be safely stored within the non-
operating condition.
7.1 Temperature
Operating ：0 to +40℃
Storage ：-40 to +60℃
7.2 Humidity (Relative)
Operating ：10 to 80% non-condensing
Storage ：0 to 90% non-condensing
7.3 Altitude
Operating ：0 to 15,000 feet ASL
Storage ：0 to 40,000 feet ASL
8.0 VERY LOW RADIATION FIELD (OPTION)
Model LR has lower magnetic and electric radiated field emissions. Internationally agreed Standard have not yet been
established. The LR model shall meet the Swedish MPRII limits：
Measurement Freq. 5Hz – 2KHz 2KHz – 400KHz
Alt. Electric Field < 25V/m RMS < 2.5V/m RMS
Alt. Magnetic Field < 250nT RMS < 25nT RMS
9.0 MECHANICAL PERFORMANCE & TRANSPORTATION
9.1 Vibration (packaged, non-operating)
General test
Ramdom ︰ 5~250Hz , 1.Grams
Period ︰ 60 Minutes/Axis
No electrical or mechanical damage shall occur after the test.
9.2 Packaged unit drop
The packaged unit shall not sustain any damage when exposed one drop of 46cm each onto one corner, three
adjacent edges, and six faces of the package.
ViewSonic Corporation
11
Confidential – Do Not Copy
G220f-1_G220fB-1
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