Heidolph LABOROTA 20 automatic - Manual (Page 95)

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22. Timer
The timer function allows ending distillation after a pre-selected period of time has expired. After
the time has elapsed, the following actions will be taken:

Lift DOWN

Rotation OFF

Heater OFF

Aerating valve OPEN, vacuum control OFF and
vacuum pump OFF.

Product feed and condensate discharge is
cancelled

Buzzer sounds for 10 seconds
Turn timer ON and start
Select Set Timer with Select key.
Set hours and minutes with Set keys.
Start timer with Start Stop key, Timer LED flashes
Time remaining appears in display
Turn timer ON and start, after having started with Auto Start Stop before
Pressing Start Stop Timer, Set Timer LED illuminates.
For more settings refer to above paragraph.
23. Safety cut-out in an overpressure situation
The LABOROTA 20 control has been designed for distillation under vacuum. All of its gaskets and
seals have been optimized for this vacuum atmosphere. Product feeding also only works under
vacuum.
In particular situations, overpressure may build-up in the glassware kit. Please understand that our
sealing system has not been designed for such overpressure situations.
In adverse overpressure situations, solvent may get into the drive module and hence damage
bearings.
Moreover LABOROTA 20 control features an electronic overpressure monitoring circuit;
"Emergency function" will disconnect the item to avoid overpressure damage.
Display Act Time LED Set Time LED
Set Ramp Time
LED
Set Ramp Value LED
Select key
Timer LED
Start Stop key
increase
decrease