Help:code to record wind speed using NRG 40H sensor

i have this wind speed sensor

i connected to arduino mega digitsl pin 5 to record wind speed every 1 min. i would like to make sure that below code is OK before run it

#include <FreqCounter.h>

void setup() {
  Serial.begin(57600);                    // connect to the serial port
  Serial.println("Frequency Counter");
}

long int frq;
float wind_speed
Void loop() {

 FreqCounter::f_comp= 8;             // Set compensation to 12
 FreqCounter::start(100);            // Start counting with gatetime of 100ms
 while (FreqCounter::f_ready == 0)         // wait until counter ready
 
 frq=FreqCounter::f_freq;//read frequency value
 wind_speed=(freq*0.765)+0.35;            // calculate wind speed 
 Serial.println(wind speed);                // print result
 delay(1000);
}

important information about sensor attached

i connected to arduino mega digitsl pin 5 to record wind speed every 1 min. i would like to make sure that below code is OK before run it

The way that you make sure the code is OK IS to run it. If the device is barely moving, but you get a wind speed of -12343 MPH, then, clearly the code is not OK. In a gale, a speed of 0.000000000001 kilometers per week is clearly wrong.

Why are you using the frequency counter library? Your device is unlikely to be outputting pulses anywhere near the frequency that that library is meant to read.