Update README.md

README.md

@@ -10,11 +10,11 @@
 <!--- Name:WINDGAUGE03A: --->
 # WINDGAUGE03A
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-## Venturi tube based anemometer
+## Venturi tube-based anemometer
 <!--- ELongName ---> 
 
 <!--- Lead --->
-High-endurance venturi anemometer with minimum moving parts. Automatic estimation of direction to magnetic nort. 
+High-endurance venturi anemometer with minimum moving parts. Automatic estimation of direction to magnetic north. 
 <!--- ELead ---> 
 
 <!--- Description --->
@@ -23,13 +23,13 @@ High-endurance venturi anemometer with minimum moving parts. Automatic estimatio
 
 ### Advantages
   * Minimised number of moving parts results in increased durability
-  * Venturi effect allows accurate measurement in wide range of speeds is especially sensitive for common low airspeeds  
+  * The Venturi effect allows accurate measurement in a wide range of speeds and is especially sensitive for common low airspeeds  
 
 ### Function principle
 
-The measuring tube consist an orifice, which increases airflow in the tube. The different speeds generates differentiall preassure, which is measured by electronic differential pressure sensor.  The same principle was used in beginnig of [aircraft airspeed measurement](https://ntrs.nasa.gov/citations/19930091190). It is advantageous due to better sensitivity at lows speeds compared to [pitot-static](https://en.wikipedia.org/wiki/Pitot_tube) tube. 
+The measuring tube consists of an orifice, which increases airflow in the tube. The different speeds generate differential pressure, which is measured by an electronic differential pressure sensor.  The same principle was used at the beginning of [aircraft airspeed measurement](https://ntrs.nasa.gov/citations/19930091190). It is advantageous due to better sensitivity at low speeds compared to [pitot-static](https://en.wikipedia.org/wiki/Pitot_tube) tube. 
 
-The anemometer consists the IMU sensor ICM-20948 which contains magnetometer, gyroscopes and accelerometers. The IMU allows sophisticated data aquisition for failure detection and gust wind analysis. 
+The anemometer consists of the IMU sensor ICM-20948 which contains a magnetometer, gyroscopes, and accelerometers. The IMU allows sophisticated data acquisition for failure detection and gust wind analysis. 
 
 ![WINDGAUGE03A schematics](doc/img/schematics.png) 
 
@@ -42,7 +42,7 @@ The anemometer consists the IMU sensor ICM-20948 which contains magnetometer, gy
     * USB
     * I²C
   * Operational temperature range -20/+45 °C
-  * Maximum hail diameter 0.5 cm 
+  * Maximum hail diameter 2 cm 
 
 ### Software installation 
 
@@ -53,7 +53,7 @@ The anemometer uses [pymlab](https://github.com/MLAB-project/pymlab) software to
 
 ##### Calibration 
 
-Anemometer should be calibrated before the first use. That ensures, calibration of magnetometer parameters. To correctly determine the wind direction by internal magnetometer. 
+The anemometer should be calibrated before the first use. That ensures, the calibration of magnetometer parameters. To correctly determine the wind direction by internal magnetometer. 
 
     python3 serial_logger.py 68  15