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Tests where done to see if the NTC and RTD temperature data was consistent at or near operating temperatures. As can be seen there is a drift where the RTD reads 2 ℃ lower then the NTC. However at room temperature this difference is reversed and reads about 1 ℃ higher.
| Name in results | Sensor, Location | Accuracy | DataSheet |
|---|---|---|---|
NTC_1 | NTCG103JF103FTDS, On RD53A | ±.5 ℃ | https://product.tdk.com/system/files/dam/doc/product/sensor/ntc/chip-ntc-thermistor/catalog/tpd_automotive_ntc-thermistor_ntcg_en.pdf |
| NTC_2 | 192-103LEW-A01, Taped to mounting plate of RD53A |
| ±1℃ | https://www.mouser.com/ProductDetail/Honeywell/192-103LEW-A01?qs=F1jq4PciTHu1X2%252BS%2F4fB2A%3D%3D | ||
| RTD_7 | pT100, Taped to mounting plate of RD53A | ±.15 ℃ | https://www.mouser.com/ProductDetail/Heraeus-Nexensos/32208550?qs=MQgg6%252BVqoaOPAnuE2NwxiQ%3D%3D |
| RTD_1 | pT100, Taped to mounting plate of RD53A | ±.15 ℃ | https://www.mouser.com/ProductDetail/Heraeus-Nexensos/32208550?qs=MQgg6%252BVqoaOPAnuE2NwxiQ%3D%3D |
| RTD_2 | pT100 |
| , Taped to mounting plate of RD53A |
| ±.15 ℃ | https://www.mouser.com/ProductDetail/Heraeus-Nexensos/32208550?qs=MQgg6%252BVqoaOPAnuE2NwxiQ%3D%3D |
| RDT_3 |
pT100, Taped to mounting plate of RD53A |
pT100, Taped to mounting plate of RD53A
| ±.15 ℃ | https://www.mouser.com/ProductDetail/Heraeus-Nexensos/32208550?qs=MQgg6%252BVqoaOPAnuE2NwxiQ%3D%3D |
| Room temperature, no load on module | In fridge, no load on module | In freezer, no load on module. |
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The NTC on the modules are type NTCG103JF103FTDS. More infomation information about these modules can be found at https://twiki.cern.ch/twiki/bin/view/Atlas/ItkPixModuleTesting#Reading_out_the_NTC_Module and https://product.tdk.com/system/files/dam/doc/product/sensor/ntc/chip-ntc-thermistor/catalog/tpd_automotive_ntc-thermistor_ntcg_en.pdf.
However the data sheet and the twiki about the sensors do not agree about the relationship between the resistivity and temperature. The differences is plotted below. Note Δt is the Data Sheet value minus the twiki results. In all our code the temperature is calculated via the data sheet values.
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