void btnGetPIDData_Click(object sender, EventArgs e)
 {
     this.btnGetPIDData.Enabled = false;
     GrblPIDData.Load();
     PIDPlot.Refresh();
     btnGetPIDData.Enabled = true;
 }
 void tbError_ValueChanged(object sender, EventArgs e)
 {
     this.errorScale = tbError.Value;
     PIDPlot.Refresh();
 }