Digital Clock

Has anyone gotten the FT function on the clock to work (ie, sound the alarm)? I’ve been able to set it but have never had the alarm sound. According to the POH, when the specified time is reached, the clock should switch to FT mode and the alarm should sound. Also, is the time set in the FT an offset from the current time or an actual time (and if actual, is it based on UT or LT)?