User's Manual

SEJIN ELECTRON, INC
SEJIN confidential - Copyright© Sejin electron, Inc. 2009.
This Document contains proprietary to Sejin Electron, Inc. Use or disclosure without written
permission from an officer of Sejin is expressly forbidden.
Document number : R-FB-0
Page 10/13
Issued date : 2009-02-11
7.3 Heat Cycle Test
Check Method: By the condition shown in the figure below, repeat heat cycle test for 2 times.
50
Standard: When the test is finished, followings must be satisfied.
a. All functions operate normally.
b. There are no defects which harm commercial value, e.g., change of color, rust or
change of form.
7.4 Key life Test
Standard: a. key-switch life: 2,000,000 cycles
b. Keyboard is qualified using Hasco pneumatic life tester using soft cushion actuator with
a 4cycles / second actuation speed 120 ~ 150gf air pressure.
7.5 Low Temperature Test
Check Method: Leave for 96 hours under –20℃.
Standard: The keyboard operates normally after the test.
7.6 High Temperature Test
Check Method: Leave for 96hours under +50℃.
Standard: The keyboard operates normally after the test.