Calibrating the Altimeter (before first use)
Since your Altimeter is sold separately from your MicroPower, to ensure the best accuracy it is necessary to do a simple calibration
procedure before first using the Altimeter. The automatic calibration involves simply placing the unit in a warm (or cool) place, and then
relocating it to a place that is at normal (room) temperature. The goal is to have a temperature difference of about 20 degrees Fahrenheit
(about 11 degrees C) during calibration, or even more. The calibration only takes a few minutes. Here are the Calibration steps:
1. Ensure that your MicroPower firmware is updated to the correct version, as described above.
2. Connect the Altimeter to the MicroPower, and have a battery ready to power the MicroPower. DO NOT LEAVE IT
CONNECTED TO USB DURING CALIBRATION! If you purchased the PowerPanel display, connect it to the Altimeter’s
3. Place the system (WITHOUT the battery) in either a cool or warm place. Examples of a cool place are a refrigerator, or an air
conditioned room, or outdoors if it is cool outside. Examples of a warm place are outdoors (if it is warm outside), a slightly warm
oven THAT IS TURNED OFF, or near a light bulb or warm heater. DO NOT HEAT THE ALTEMETER TO ABOVE 120 F (50
C) DURING THIS PROCESS. Let the system adjust to the new temperature for about five minutes.
4. Remove the system from the warm or cool location, and quickly place the system on a countertop at room temperature. Position
the altimeter so that it is NOT resting flat on the countertop – place it so it is supported by its wires, standing vertically or
otherwise not resting flat. This is to reduce direct thermal conduction from the altimeter to the countertop.
5. Power the MicroPower with a battery (DO NOT CONNECT IT TO US
very soon after relocating it. The LED on the
MicroPower should immediately turn on solid (no blinking) which indicates calibration has begun. If you have the PowerPanel,
the message “Calibrating Alt, See Instructions” will appear.
6. Let the unit calibrate, without disturbing it, for about 2 minutes. Once the LED blinks regularly, calibration is complete!
7. Disconnect the battery and reconnect it. If the LED again goes on solid, that means there was a problem with calibration. Most
likely, the temperature change was not sufficient. Repeat the process.
8. If you ever need to recalibrate the unit (after successful calibration), connect the MicroPower to the USB connection, and click
“Tools, Custom Hardware Options.” Then, click “Tools, Custom Hardware Options – ADVANCED USERS” and check the “I
wish to Recalibrate my MicroSensor Altimeter” and click OK. This clears the calibration.