Here's a run down on how to use to CLUE altimeter.

Normal Mode

When the program starts up, it enters normal mode. The pressure sensor is constantly read and the altitude is computed and reported. Here is a summary of what is shown:

  • A: The corrected altitude readout.
  • B: Altitude based on standard day sea level pressure.
  • C: Current barometric pressure and sensor temperature.

The idea with the two altitudes values is to provide a comparison between a "calibrated" or corrected (COR) value with one that is uncorrected. For the uncorrected value, the sea level pressure value used in the altitude calculation is that for a standard day (STD) of 1013.25 hPa.

The COR value is the one that will show your actual altitude based on the current calibration. If the calibration is wrong, then the reading will be wrong. Here's how to calibrate:

Calibration Mode

This is the mode you enter to calibrate the altimeter. The calibration is based on knowing your current altitude - so you will need that value.

To enter calibration mode, hold both buttons.

CAL appears in lower right corner. The STD readout changes to dashes.

Now use buttons to increase (INC) or decrease (DEC) the value in A to match the current altitude.

Once the value in A is set, hold both buttons again to save the calibration and exit CAL mode.

CAL disappears and the altitude values continue to update again.

And now you are back to Normal Mode.

This guide was first published on Jul 28, 2020. It was last updated on Jul 28, 2020.

This page (Using the CLUE Altimeter) was last updated on Apr 12, 2021.

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