> For the complete documentation index, see [llms.txt](https://help.boomerang3.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.boomerang3.com/logger-card-client-user-manual/calibration/fu003-logger-card-high-resolution-and-fu004-logger-card-high-temperature.md).
# FU003 Logger Card High resolution and FU004 Logger Card High temperature
The upper form part provides information about the current calibrator, the date of calibration and a comment.
FU003 and FU004 sensors (DS1922L/T) allows to set one or two calibration points depending on the calibration performed.
To set a single point calibration:
* select “Single temperature point adjustment”,
* enter reference temperature value in “Hot-reference temperature \[°C]” field,
* enter calibration adjustment value in “Hot-reference adjustment \[°C]”
* optionally add a comment,
* click “Set” button to save the calibration settings in the sensor.
To set two points calibration:
* select “Two temperature points adjustment”,
* enter reference temperature values in “Cold/Hot-reference temperature \[°C]” fields (check that value in “Cold-reference temperature” field is lower than in “Hot-reference temperature” field),
* enter corresponding adjustments in the “Cold/Hot-reference adjustment \[°C]”
* optionally add a comment.
* click “Set” button to save the calibration settings in the sensor.
FU003 and FU004 sensors offer a functionality to restore the default calibration values set during production.
To restore default calibration settings,
* press “Return to factory data”\_\_button. The fields with temperature settings will be filled automatically),
* optionally add a comment,
* click “Set” button to save the calibration settings in the sensor.
The message box will inform about the save procedure result:
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