Open the manual. Press CTRL+F and type 'beeps' and press enter. There are 19 mentions.
https://www.transcat.com/media/pdf/80vUserManual.pdf
The continuity test features a beeper that sounds as long as a circuit is complete. The beeper allows you to perform quick continuity tests without having to watch the display. To test for continuity, set up the Meter as shown in Figure 4. Press E to turn the continuity beeper on or off. The continuity function detects intermittent opens and shorts lasting as little as 1ms. A brief short causes the Meter to emit a short beep.
Was there a Diode in the circuit?
A short beep sounds if the diode is good (< 0.85 V). A continuous beep sounds if the reading is ? 0.100 V. This reading would indicate a short circuit. The display shows "OL" if the diode is open.
and also
Enter MIN MAX recording mode. The Meter is locked in the range displayed before you entered MIN MAX mode. (Select the desired measurement function and range before entering MIN MAX.) The Meter beeps each time a new minimum or maximum value is recorded