Delta mDCC-100 Operating Instructions Manual page 13

TIMER
4.14 Set desired "Countdown Timer" by pressing "Timer" key (Fig.7/).
Set parameter in order of Hours (HH), Minutes (MM) and Seconds (SS) respectively by
pressing  (Up), (Down) and  (Enter) key.
Maximum timer limit can be set up to 99 Hours, 59 Minutes and 59 Seconds.
4.15 Unit will give" Alarm" (beep audio signal) as the countdown time is over.
Switch off alarm by pressing any key.
Digital differential cell counter μDCC-100
Operating instructions
Fig. 7 Timer
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