Reliability Test of NTC temperature sensor

January 2, 2022

Reliability Test of NTC temperature sensor
Test Item Test Standard Test method Performance requirements
Zero Power Resistance IEC 60539-1 Immerse samples in the constant temperature bath at 25℃±0.005℃,test steady resistance

Resistance tol ±1%

 

B value IEC60539-1 Immerse samples in the constant temperature bath at 25℃,50℃(or 85℃), test steady resistance,and calculate B value

Resistance tol ±1%

 

Free fall

IEC60068-2-32

 

Fall height: 1.5±0.1m,Surface: Cement , 1 time

No obvious damage, R25 △R/R≤±1%

 

Insulation

IEC60539-1

 

500V pressure on insulation shell test insulation resistance

>500MOhm

 

Withstand voltage IEC60539-1

Withstand voltage: 1500V/AC ,Leakage current:2mA Lasting: 60sec

 

No obvious damage

 

Tension IEC60068-2-21

Pull uniform speed at the end, F>4.0KG(requested by customer)

 

No obvious damage, R25 △R/R≤±1%

 

Vibration Q/HBm 108-94 Test frequency: 10~500Hz,swing: 1.2mm acceleration: 30m/s2 Direction X,Y,Z Time:8Hour/direction

No obvious damage, R25 △R/R≤±1%

 

Steady humidity and heat IEC60068-2-78 Temp:40±2℃ Humidity:92-95%RH Time:1000±24Hour

No obvious damage, R25 △R/R≤±1%

 

Thermal time constant EC60539-1 Immerse in 25℃ water,after thermal balance,immerse in 85℃,resistance arrives 63.2%,calculate total time

<10 sec

 

High temperature storage IEC60068-2-2 Temp:125℃±5℃ Time: 1000±24Hour No obvious damage, R25 △R/R≤±1%
Cold and thermal shock IEC60068-2-14

-40℃~+125℃ T1:30min Cycle time:1000

 

No obvious damage, R25 △R/R≤±1%

 

Knock experiment IEC60068-2-77

Acceleration:250m/s2 Pulse lasting: 6ms Knock times: 1000 Recovery time: 2 Hour

 

No obvious damage, R25 △R/R≤±1%

 

Low temperature storage IEC60068-2-1

Temp: 40±2℃ Time: 1000±24Hour

 

No obvious damage, R25 △R/R≤±1%

 

Salt spray IEC60068-2-11 Temp: 35±2℃ Collection hour : 1.0mL~2.0mL Time: determine per as actual demand

No obvious damage, R25 △R/R≤±1%