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NXT Barometric Sensor
The NXT Barometric Sensor can be used as part of a weather station or to monitor altitude. The sensor can be used to read both atmospheric pressure and temperature. The pressure value from the sensor is in 1/1000th of inch Mercury (inHg) and the temperature is in 1/10th degree Celsius. The NXT-G block allows the NXT to read the pressure in either inHg or hPa (hectopascals) and temperature in either Celsius or Fahrenheit degrees. Once adjusted for current conditions, the block can also calculate altitude in feet or meters.
The Barometric Sensor block supports 7 actions:
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Read Pressure - The value output will be the absolute barometric pressure in 1/1000th inHg (inches of Mercury) or in 1/10th hPa (hectopascals).
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Read Temperature - The value output will be the temperature in 1/10th degrees of either Fahrenheit or Celsius.
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Read Altitude - value will be the approximate altitude based on current barometric pressure and altitude pressure setting.
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Calibrate to Input - Calibrate the barometric pressure using the passed in Input value in either inHg or hPa. This will value will become the current barometric pressure. This calibration will override previous calibrations and will affect future Pressure and Altitude readings. This calibration is saved in the sensor's EEPROM memory.
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Calibrate to Factory - Restore the barometric calibration to the factory setting.
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Set Altitude - Set the Altitude based on the current Input value. The Value output will be the current Altitude Pressure in 1/1000th inHg(regardless of Measurement system selected). Note that this setting is not saved in EEPROM and only applies to subsequent altitude readings within the NXT-G program.
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Set Altitude Pressure - Adjust the altitude setting to a specific altitude pressure. This is similar to setting an altimeter with the Kollsman window. Note that this setting is not saved in EEPROM and only applies to subsequent altitude readings within the NXT-G program.
Programming languages supported