Overnight storage and calibration of the phx42 should be done indoors at or near room ambient conditions (15-25 °C or 59-77 °F) with a maximum humidity of 85%.
At the beginning of the day, you can triple-tap the power button to ignite the unit, or by using the app. After manually calibrating, or calibrating on a SpanBox, it is best to leave the phx42 ignited and running, uninterrupted, for the entire day. At the end of the day or when monitoring is finished, place the phx42 in “Sleep Mode” by quad-tapping the power button. Ensure the phx42 is stored in the environmental conditions stated above.
Note: The phx42 must be ignited for at least 15 minutes prior to calibration, drift, or any monitoring that will be performed. If the phx42 is used before it is warm, you may receive readings outside of the factory-specified accuracy ranges.
