Metrohm 765 Dosimat User Manual download pdf (Page 33)

3.2 Diagnosis

765 Dosimat

The spindle moves 80 mm with respect to spindle zero.

Instead of the spindle height one can also measure the expelled volume (corresponding to the max. volume

of the exchange unit).

17.

Actuate <FILL> and simultaneously take the time until the dosimat is in 'ready'

position again.

Filling time: one cock cycle 1 s

filling 18 ... 20 s

General rules:

Spindle and cock must move in regular speed (observe sound!)

In the filling position the cock coupling must turn the lever of the exchange unit blamelessly to the left stop

(almost without play and without jamming).

18.

Knob 'dV/dt' fully to the left.

19.

<MODE>: select DIS R.

20.

<ENTER>

DIS R 0.000 ml

21.

V-DIS 1. ml

22.

Depending on the exchange unit used, enter the volume as below:

1 ml: 0.02 ml

5 ml: 0.1 ml

10 ml: 0.2 ml

20 ml: 0.4 ml

50 ml: 1 ml

23.

<ENTER>

24.

<GO> (depress briefly) and with a stop watch take the time until the cock starts

turning.

The time must be 14 ... 24 s.

25.

Reset the parameter if under 5. the reading was auto fill = on .

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Metrohm 765 Dosimat User Manual Page 33