Metrohm 765 Dosimat User Manual download pdf (Page 35)

3.4 Releasing a locked spindle

765 Dosimat

3.4 Releasing a locked spindle

with inserted Exchange Unit

The burette drive may very occasionally jam at the top or bottom end of the cylinder. If

jamming occurs at the top or when the drive is out of function, the Exchange Unit can no

longer removed. In this case, it is necessary to proceed as follows:

2 screws (M3 fillister head)

knob

edge of bench

2 screws (M4 countersunk)

Fig. 4

Disconnect instrument from power supply!

Remove control knob.

Place instrument over edge of bench to allow the M3 screws to be removed.

Remove M4 screws.

Lift off top part of instrument together with Exchange Unit in the manner shown by

the arrow.

The electronic circuits are now accessible!

On no account touch these!

Remove spindle from mechanical stop by turning the large gear wheel. (In case

that the motor is inoperative, position spindle by hand to zero position.)

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Metrohm 765 Dosimat User Manual Page 35