User's Manual

SEJIN ELECTRON, INC
6.5 Chattering and bounce
The operation force shall be applied according to the normal operating method at 5V DC, 5mA.There shall
be no bounce and chattering within 10msec when it is measured using a specially prepared tester or a
synchroscope.
Chattering and bounce are defined as following diagram :※
7 ENVIRONMENTAL REQUIREMENTS
The following specifications pertain to the keyboard assembly.
7.1 Operational ambient temperature and humidity
Temperature : 0 ~ 50℃
Humidity : 85%RH
7.2 Storage ambient temperature and humidity
Temperature : -20 ~ 60℃
Humidity : 95%RH
7.3 Shock
There should be no abnormal operation and appearance of the keyboard when an impact of 10G has
been applied to the packaged keyboard. The testing method shall be in accordance with 213B of MIL-
STD-202E
7.4 Key life Test
Standard: a. key-switch life: 10,000,000 cycles of operation at 25 degrees Celsius ambient temperature. The
cycling rate is between 10 to 1000 cycles of operation per minute
1) Test equipment : Plunger Type.
2) Actuation speed : 4 times/sec
3) Press pressure : 150±50g
7.5 Heat Cycle Test
Check Method: By the condition shown in the figure below, repeat heat cycle
test for 2 times.
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.
7.6 Low Temperature Test
Check Method: Leave for 96 hours under –25℃.