单元格不为空，不考虑公式。 Java脚本

Question

我在Google表格中创建了此脚本，以便在我输入的范围不为空时接收通知电子邮件。如果我使用“ if”函数，说当单元格为！='null'时通知我，它也会为我提供公式。 仅当单元格不为空时如何在不考虑公式的情况下如何获得通知？

function ErrorCheck() {
  // Fetch the monthly sales
  var ErrorCheckRange = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("Sheet").getRange("B2:P60"); 
  var ErrorCheck = ErrorCheckRange.getValue();
  // Check totals sales
  if (ErrorCheck != 'null'){
    // Fetch the email address
    var emailRange = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("Sheet").getRange("R2");
    var emailAddress = emailRange.getValues();
  
    // Send Alert Email.
    var message = 'Please, there are some errors. Check and correct them as soon as you can! Thanks ' + ErrorCheck; // Second column
    var subject = 'ERROR CHECK | Garage Location! ';
    MailApp.sendEmail(emailAddress, subject, message);
    }