User's Manual

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12.0 ALTITUDE
16.1 Operating and Storage
The keyboard shall withstand both an operating and storage altitude of sea
level to 15,000 feet.
13.0 KEY LIFE TEST
Standard: a. key-switch life: 10,000,000 cycles
b. Test equipment : Plunger Type.
Actuation speed : 4 times/sec
Press pressure : 200± 50gf
14.0 AGENCY APPROVALS
18.0.1 SEJIN ELECTRON keyboards are UL recognized (UL file XXXXXXX)
and CSA certified (CSA file #XXXXXXXX) components. Any proposed changes,
to the generic keyboard design, must be reviewed by SEJIN ELECTRON
Engineering to determine any impact on agency approvals prior to incorporation
of said change into production keyboards.
15.0GENERAL KEYBOARD REQUIREMENTS
15.1Membrane.
Contact membrane switching technology is applied. The membrane
consists of a two layers of EL grade polyester printed with a combination of
silver/carbon and UV dielectric compounds.
15.2 Contact resistance
20.2.1 Closed circuit resistance 300Ω (max)
20.2.2 Open circuit resistance 100 ㏁(min)
15.4 Insulation Resistance
19.4.1 (measured between any two adjacent sense or drive line) 100 ㏁ minimum,
with 100 VDC test voltage.
15.5 Key top Height Variation
The key top height variation must not greater than 0.5mm when measured between the center to
center of keys next to each other. The measurement will be performed with keys in the home
positions.
15.6 Keytop Alignment
The key top alignment tolerances must not exceed 0.5mm when keytop measured between the
center to center of keys next to each other. The measurement will be performed with keys in the
home positions.
15.7 Rotational Alignment
The maximum rotation of key shall be less than 0.5mm as shown below.
Rotational Alignment Alignment
Height variation
15.8 End stroke strength
End stroke should withstand a static load of 500gf applied on the tip of the key stem in the
perpendicular direction for 1minute.