Bangle2 need help with barometer app

I've set the Min and Max values but still I'm not getting the value to display.
Below is my modified code, what's wrong with this, there is no hand on display;

try {
 function accelHandler(accel) {
  if (accel.z > maxZ) {
      maxZ = accel.z.toFixed(2);
    }
    
 
    drawHand(Math.round(accel.maxZ));
   layout.render();
  }
   Bangle.setPollInterval(80);
  Bangle.on('accel', accelHandler);


} catch(e) {
  print(e.message);
   print("value exceeds limits");
    drawHand(MIN);
}