Welcome to the wonderful world of scripts! There is so much you can do with your projects when using Google Apps Script.
Your question is a good one but I took a different approach. Rather than using an import range that needs to be recalculated, I just wrote a script that would do a similar thing. If you need to collect a specific range of data instead of the entire sheet, then just make one small change to the script provided.
//CHANGE
var poData = poTab.getDataRange().getValues();
//TO
var poData = poTab.getRange('INSERT A1 NOTATION HERE').getValues();
That should allow you to select a specifc range if needed.
//TRANSFER DATA FROM ONE TAB TO ANOTHER
function transferFromSameSpreadsheet() {
//GETS ACTIVE SPREADSHEET
var ss = SpreadsheetApp.getActiveSpreadsheet();
//GETS SPECIFIC SHEET BY NAME WHERE DATA IS STORED
var poTab = ss.getSheetByName('Po Tracking');
//STORES ALL DATA FROM SHEET
var poData = poTab.getDataRange().getValues();
//GETS SPECIFIC SHEET BY NAME WHERE DATA IS SENT
var transferTo = ss.getSheetByName('insert sheet name here');
//CLEARS OLD DATA
transferTo.clearContents();
//UPDATES SHEET WITH NEW DATA
transferTo.getRange(1,1,poData.length,poData[0].length).setValues(poData);
}
//TRANSFER DATA FROM A MASTER SHEET TO ANOTHER WORKBOOK. RUN SCRIPT IN ACTIVE WORKBOOK, NOT MASTER.
function transferFromDifferentSpreadsheet() {
//OPENS SPREADSHEET BY ID
var ms = SpreadsheetApp.openById('insert spreadsheet id here');
//GETS ACTIVE SPREADSHEET
var ss = SpreadsheetApp.getActiveSpreadsheet();
//GETS SPECIFIC SHEET BY NAME WHERE DATA IS STORED
var poTab = ms.getSheetByName('Po Tracking');
//STORES ALL DATA FROM SHEET
var poData = poTab.getDataRange().getValues();
//GETS SPECIFIC SHEET BY NAME WHERE DATA IS SENT
var transferTo = ss.getSheetByName('insert sheet name here');
//CLEARS OLD DATA
transferTo.clearContents();
//UPDATES SHEET WITH NEW DATA
transferTo.getRange(1,1,poData.length,poData[0].length).setValues(poData);
}
Good luck!
Get range A1 notation documentation: https://developers.google.com/apps-script/reference/spreadsheet/sheet#getrangea1notation