how to stop countup?

hi i try to stop the countup on 5.30 minutes

$('#timer2').tinyTimer({
    from: Date.now(),
    format: '%0H:%0m:%0s',
     onTick: function (val) {
        if (val.m > 5 && val.s > 30)
        {
            /\* stop?*/
        }
    }

how ?
