Drive Lock; Tightening Of Evaporator Flask - Heidolph LABOROTA 20 control Betriebsanleitung

33. Drive lock

picture on page 89
The drive lock facilitates opening and closing the large coupling ring (3), holding the flask (4).

To engage lock: turn knob (5) CW until "lock" appears.
Manually rotate drive head, until lock snaps into place. Rotation Stop LED (6) on front panel
illuminates.

To release lock: turn knob (5) CCW until "unlock" appears.
Rotation Stop LED (6) on front panel dims.

34. Tightening of Evaporator Flask

Evaporator Flask must be sufficiently tightened with large coupling ring (X).
For this purpose the large coupling ring (X) is equipped with a torque indicator. As illustrated below
the coupling ring has to be tightened until the indicator point (Y) is aligned with point „1" (Z). This is
accompanied by a „click". For distillation without vacuum the ring has to be tightened until point (Y)
is aligned with point „2" (A).
If rule is not followed leakage can occur during operation.
X
Y
A
Z
103
E