Metrohm 894 Professional CVS - Manual (Page 28)

3.2 Equipping the RDE measuring head
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894 Professional CVS
2
CAUTION
Do not apply pressure to the drive disk on the connector plate of
the measuring head arm, as this could damage the stirrer motor.
Figure 7 Do not touch the drive disk
Use one hand to hold the measuring head arm on the rear and use
the other hand to insert the measuring head into the connector plate
of the measuring head arm.
The measuring head must snap into place with an audible click.
Figure 8 Inserting the measuring head
3 Remove the stopper (3-5) from the pipetting opening.