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A2TPMI334AOCA 参数 Datasheet PDF下载

A2TPMI334AOCA图片预览
型号: A2TPMI334AOCA
PDF下载: 下载PDF文件 查看货源
内容描述: 热电堆集成信号处理电路 [Thermopile with integrated signal processing circuit]
分类和应用:
文件页数/大小: 21 页 / 317 K
品牌: PERKINELMER [ PERKINELMER OPTOELECTRONICS ]
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Datasheet A2TPMI  
Application Information  
AMBIENT TEMPERATURE COMPENSATION  
Because of many physical effects, that influence the non-contact temperature measurement based on  
infrared radiation, it is difficult to meet the best initial adjustment for a specific application. Therefore  
some deviations might be found at first measuring. For all applications the optimized solution can be  
prepared and fixed based on the measurement in the application environment. PerkinElmer is pleased  
in providing you assistance to find the conditions, which deliver the highest accuracy in your application.  
The temperature compensation is only working well within a certain ambient temperature range, limited  
by different device parameters of the thermopile sensor and the temperature reference sensor. The  
following diagram shows a typical characteristics and is only an example for better understanding of the  
principle compensation curve. The curve shows the deviation for a correct working of a compensated  
module.  
Temperature Deviation of VTobj vs. Ambient Temperature  
3
2,5  
2
1,5  
1
0,5  
0
-20  
0
20  
40  
60  
80  
100  
-0,5  
Ambient Temperature [°C]  
The compensation of the module sample in the diagram is adjusted to the best fitting at 20°C to 80°C  
ambient temperature, but the curve can be shifted in the whole ambient temperature range through the  
change of A2TPMI parameters.  
MEASUREMENT TOLERANCE  
The temperature error of the A2TPMI depends on several factors like the emissivity, object temperature,  
object size to spot size relation, temperature gradients over the sensor housing in the environment,  
device tolerances and the optimal adjustment of the ambient temperature compensation.  
The accuracy as specified under VTamb and VTobj characteristics is based on theoretical calculation as  
well as on statistical evaluation results. The PerkinElmer quality system ensures that all A2TPMIs are  
calibrated and tested under a certain test conditions in order to guarantee these specifications.  
However, due to the nature of infrared remote temperature measurements there might occur limits ex-  
ceeding or deviations in specific application environments. In this case please contact the PerkinElmer  
application support to help you solving the problem.  
A2TPMI Datasheet Rev4  
Page 11 of 21  
Rev. Oct 2003