Parsing csv with a tab delimiter does not work - why?

Question

1C-Bitrix

require_once ($_SERVER["DOCUMENT_ROOT"] . "/bitrix/modules/main/classes/general/csv_data.php");
        $csvFile = new CCSVData('R', true);
        $csvFile->LoadFile($_SERVER["DOCUMENT_ROOT"] . '/upload/min.csv');//Файл
        $csvFile->SetDelimiter('\t'); //разделитель
        $bFirstHeaderTmp = $csvFile->GetFirstHeader();  //Заголовок
while ($arRes = $csvFile->Fetch()) { //Перебор CSV файла по полям
$arRes = $GLOBALS["APPLICATION"]->ConvertCharsetArray($arRes, "WINDOWS-1251", SITE_CHARSET);
            echo '<pre>';
            print_r($arRes);
            echo '</pre>';
}

Actually, this code will give the following result for one of the fields:

Array
(
    [0] => TRANSMASTER UNIVERSAL	45100I	Труба гофрированная универсальная 45X100	ШТУКА	1		336,9	4
)

That is, it turns out that the tabulation between the data is not recognized, since the expected result should be the following for one of the positions:
Array
(
[0]=>TRANSMASTER UNIVERSAL
[1]=>45230I
[2]=>Universal corrugated pipe 45X230
[3] =>STUKA
[4]=>1
[5]=>616,83
[6]=>8
)
If you save this file with any editor with a delimiter for example ',' - and change the delimiter in the code, then everything will work as it should. If the source file is again saved with a tab delimiter and changes are made to the code, then again the code does not work correctly.
Actually what's the catch?

Answer 1

echo 'dfsdf \t dfsdfsd';
Try to display this and everything will become clear, if it becomes not clear, then you just entered 2 characters, not a tab character. Need double quotes