It attaches TMP006 and there are three questions.

Hello Satoshi,

Thanks for posting your TMP006 questions on the e2e forums.To answer your questions..

- Does measurement accuracy get worse in distance? 
Are there related data and distance permitted then?

Yes, for a given application the accuracy of TMP006 decreases when the distance of the object varies. How ever if you follow the recommended distances for your application along with the field of view requirements and then when you calibrate the part (without altering the setup any further) you should be able to achieve accuracy as per the data sheet. The general rue is the distance of the object from TMP006 has to be less than half of the object radius. 

- How long [ maximum ] is the measurement temperature range of IR? 
(It was writing to the register setup of a data sheet to 150 ℃)

The maximum operating temperature of the part is -55 to 125degC. However as your pointed out, the max storage temp range in the register filed is -65 to 150degC but this does not guarantee the behavior of the part as per the data sheet values.

- Although cared about the measurement accuracy of IR sensor worsening by the rise of ambient air temperature (Local), 
Does Fig. 3 of URL show the graph after the calibration was carried out below? I will get back to you on this upon consulting the concerned engineer who performed this test.
And if there is the method of maintaining the measurement accuracy of IR sensor, please let me know. 
http://www.tij.co.jp/jp/lit/ug/sbou108/sbou108.pdf

Please follow the recommended layout guidelines, distance, field of view requirements and also make sure that your object surface has high emissivity.  Can you provide me more details on the intended application so that I can provide you better suggestions.

Best Regards, 

Abhi Muppiri

Applications Engineer

AIP- Sensing Products

Texas Instruments

Hello Satoshi,

Figure 3 of the document highlights the effect of offset caused due to the difference in time constants(K) between PCB and TMP006 sensor. This topic does not address calibration of the device. All its trying to explain is that, temperature mismatch occurs if you do NOT follow the recommended guidelines to match the Thermal Time Constants (kTMP006 ≅ kSENSOR_PCB). 

The purpose of the graph is to depict what would happen if you don't follow the guidelines.

Hope this answers your question.

Best Regards, 

Abhi Muppiri

Applications Engineer

AIP- Sensing Products

Texas Instruments