Biogents BG Manual page 53

R
S2
Start and end time 2
E2
To set up a second start and end time, press button 3 after setting up the
first end time. "S2" (Start time 2) appears in the display. Set the time with
buttons 1 and 2 as described previously. To set the second end time, press
button 3. "E2" will appear in the display. Set time with buttons 1 and 2.
After the second end time is entered, press button 3. Now the timer is run-
ning, shown by an "R" in the display. NOTE: If a second start/end time cycle
is not required, set both the second start and end time to one minute after
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the end of the first cycle above.