Working with your updated fiddle is very helpful. Working with my updated fiddle based on yours, if you update your input text to Hello
and change the time picker to 10:30am
you will see the filter is now working properly.
The field
property below was set incorrectly.
var filter = {
field: 'Timestamp',
operator: 'eq',
value: val
};
Updated Fiddle: http://jsfiddle.net/wyze/gUF43/7/