Setting the lepton 3.5 measurement temperature area of Purethermal2

[Young Woo Participant]

Hello
I am developing the firmware of Purethermal2 to measure body temperature.
I uploaded the Purethermal1-firmware1.3.0 firmware without any modifications and used the Lepton 3.5 sensor.
After that, we measured the temperature of the Black Body using Purethermal2, but the temperature deviation was about 3 to 5 ̊C.
I looked for LEPTON® Engineering Datasheet to reduce the temperature deviation to less than 1 ̊C, but I couldn’t find it.

I’m curious.
1. Is it possible to reduce the measurable temperature of Purethermal2 to 33 to 40 ˚C?
2. Would it be possible to reduce the temperature deviation of Purethermal2 to within 1˚C?
3. Is it possible to use it whenever my signal goes in instead of the regular movement of the Sutter in Lepton 3.5?

Note URL
https://github.com/groupgets/purethermal1-firmware
https://www.flir.com/globalassets/imported-assets/document/flir-lepton-engineering-datasheet.pdf?_ga=2.211846356.1961103830.1606268237-1348910004.1590628459

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