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Bosch Sensortec | HSMI BME280
3.3. Reconditioning Procedure
After exposing the device to operating conditions, which exceed the limits specified in the datasheet, e.g.
after reflow, the humidity sensor may possess an additional offset. Therefore the following reconditioning
procedure is mandatory to restore the calibration state:
1. Dry-Baking:
2. Re-Hydration:
3. Rest period: for one hour at room temperature
or alternatively
1. Dry-Baking:
2. Re-Hydration:
3. Rest period: for one hour at room temperature
or alternatively after solder reflow only
1. Do not perform Dry-Baking
2. Ambient Re-Hydration: ~25 °C at >40% rH for >5d
3.4. Classification reflow profile
The following figure describes the recommended reflow soldering process.
Vapor phase soldering has to be avoided.
Please note: Dry-baking of the BME280 prior to soldering is not allowed and not needed due to
MSL1.
Document number BST-BME280-HS006-00 | May 2018
© Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third
parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany.
Note: Specifications within this document are subject to change without notice.
120 °C at <5% rH for 2 h
70 °C at 75% rH for 6 h
120 °C at <5% rH for 2 h
25 °C at 75% rH for 24 h
8 | 24
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