Using split() is probably not your best bet. Since your fields seem to be fixed width, you'll do better with unpack() or, perhaps, repeated calls to substr().

Addendum: For example, this

my ($testnumber, $llimit, $value, $ulimit, $unit, $name) 
    = unpack 'A9A12A12A10A8A*', $_;
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-sauoq
"My two cents aren't worth a dime.";