參數(shù)資料
型號: ord221
廠商: OKI SEMICONDUCTOR CO., LTD.
英文描述: Reed Switch(舌簧開關)
中文描述: 干簧(舌簧開關)
文件頁數(shù): 31/145頁
文件大?。?/td> 729K
代理商: ORD221
DESCRIPTION OF SYMBOLS AND TERMS
REED SWITCH
29
Contact resistance is the resistance between contacts when the contacts are
closed and includes conductor resistance.
Test method (2) Measurement circuit of contact resistance
Term
Symbol
Unit
Description and Test Methods
Contact
Resistance
CR
m
W
Note: Measure after making sure that the center of the coil and the center of
the reed switch contacts are aligned. Initially, apply soak current (100
AT) then return to zero (AT). Next, apply the current in the same
direction and measure it. The polarity of the current applied to the coil
should make the direction of the energized magnetic field to be the same
as the direction of terrestrial magnetism. (The leading end of the coil-
wire at the top should have positive polarity.)
Make type
mA
mV
Constant current
power supply
Microohmmeter
(YHP-4328A or equivalent)
Oki standard coil
{
Applied voltage for measurement (less than 10 V DC)
Current for measurement (less than 10 mA)
}
or Microohmmeter
Coil current 20 mA (100 AT)
mA
mV
Constant current
power supply
Microohmmeter
(YHP-4328A or equivalent)
Oki standard coil
COM
N.C
+
N.O
Applied voltage for measurement (less than 10 V DC)
Current for measurement (less than 10 mA)
or Microohmmeter
Coil current 20 mA(100 AT) N.O
0 mA( 0 AT) N.C
Transfer type
{
}
Specifies a maximum value of transient voltage over the contacts caused by
surge current or other external factors. Below this rated value, the reed switch
operates without destruction of its contact insulation resistance.
Breakdown
Voltage
V
+
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