Reliability Test of NTC temperature sensor
January 2, 2022
| 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% |