Re: Barometric Pressure Calibration

I too am a new owner in early April of a 5-in-1 Pro+ and Display(06039M) and was having problems understand barometric pressure.

I thought the pressure reading was taken in the sensor. But it turns out that it's taken in the display unit, and/or in the smartHUB if you have one. The auto mode of the display takes a pressure reading as if you were at sea level. It needs to be put in manual mode and adjusted for elevation. Some sites like Wunderground will automatically do the elevation adjustment for you when you send them the readings.

So you need to understand which device is taking the pressure reading and how that reading is sent to the different web sites like My AcuRite and Wunderground.

From my Display manual:

*To change from AUTO to MANUAL pressure mode and vice versa, press
AND HOLD the “ ” button for 5-7 seconds. The display indicates the
current pressure mode selected, “AUTO” or “MANUAL”. The “ ” icon will
appear next to the barometric pressure to indicate that MANUAL mode has
been activated. Press and HOLD the “ ” button for 5-7 seconds to return to
AUTO mode.

How calibrations are sent:

For smartHUB use only - readings sent to Weather Underground do not have calibrations applied. This is due to sensor readings are sent directly from the smartHUB.

For PC Connect Display only - when the calibrate readings settings are set directly in the PC Connect software, the readings are sent with calibrations to Weather Underground and My AcuRite.

NOTE
How to set the reading calibration of barometric pressure is based on the device.

smartHUB only- set in the profile of the smartHUB.

PC Connect Display only- required to be set in the PC Connect software.