private void UpdateDaqStats()
{
const string na = "N/A";
var temp = _deviceConnection.Temperature;
var volBat = _deviceConnection.VoltageBattery;
var volUsb = _deviceConnection.VoltageUsb;
labelTmpDaq.Text = Double.IsNaN(temp) ? na : temp.ToString("F2");
labelVolBat.Text = Double.IsNaN(volBat) ? na : volBat.ToString("F2");
labelVolUsb.Text = Double.IsNaN(volUsb) ? na : volUsb.ToString("F2");
}