In actual humidity sensor calibration difficult circumstances, there are some simple method to determine the humidity sensor performance and inspection.
1, consistency judgement, the same type, same humidity sensor products * good buy more than two at a time, the more the, together electricity detection output value, under the condition of relatively stable, observe the consistency of the test.
If further testing, can record within 24 h intervals for a period of time, a day usually have high, medium and low three kinds of humidity and temperature conditions, can be * * to the consistency and stability of the product, including temperature compensation characteristics.
2, with the mouth breath iced or use other means of humidification humidification of sensor, observe its sensitivity, repeatability, wet the dehumidifying performance, as well as the resolution, * high range of product, etc.
3, to the product box testing and closed box of two cases.
More are consistent, the thermal effect was observed.
4, the product in high temperature and low temperature state (
According to the specification standard)
Under test, and returned to normal before the inspection and testing records, check the temperature adaptability of the product, and observe the consistency of the product.
Product performance * end according to quality inspection department regular complete testing means.
Saturated salt solution is used as the calibration, also can use brand name products at test, the product should also can use for a long time in the process of long-term calibration * * as to judge the quality of the humidity sensor.
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