Adjustment - BRAND Dispensette III Operating Manual

After a long period of usage an adjustment of the instrument might be necessary.
I Calibrate for example at nominal volume (see page 46).
I Calculate mean volume (result of weighing) (see page 46).
I Adjust the instrument (to the calculated mean volume).
I After the adjustment, further calibration is necessary to confirm appropiate adjustment.
Example:
Gravimetric testing yields a delivered volume
of 9.90 ml with a set volume of 10 ml.
Type Digital
1.
Open housing by sliding the latch to the left and removing
the front (Fig. 1).
2.
Lift gear lock lever to release. With this action, the adjust-
ment cover plate comes off (Fig. 2).
3.
Pull the red knob to disengage the gears and set the dis-
play to actual delivered volume (e.g., 9.90 ml) (Fig. 3).
4.
Reposition red knob and gear lock lever to their original
positions (Fig. 4).
5.
Replace housing and slide the latch to the right (Fig. 5).
Alteration of factory setting is indicated by a red recalibra-
tion flag (Fig. 6).
Type Analog-adjustable
1.
Insert the pin of the mounting tool into the cover plate
(Fig. 1), and break it off with a rotating motion (Fig. 2).
2.
Insert the pin of the mounting tool into the adjustment
screw (Fig. 3) and rotate to the left in order to increase
the dispensing volume, or rotate to the right to decrease
the dispensing volume (e.g. for an actual value of 9.97 ml,
rotate approx. 1/2 turn to the left).
3.
The change in the adjustment is indicated by an exposed
red ring (Fig. 4).
Adjustment range
Nominal Digital
volume max. +/-
0.5 ml -
1 ml -
2 ml 24 µl
5 ml 60 µl
10 ml 120 µl
25 ml 300 µl
50 ml 600 µl
100 ml -
Analog/Fix One rotation
max. +/- corresponds to
5 µl ~ 3 µl
6 µl ~ 15 µl
12 µl ~ 15 µl
30 µl ~ 35 µl
60 µl ~ 65 µl
150 µl ~ 130 µl
300 µl ~ 265 µl
600 µl ~ 400 µl

Adjustment

Digital
1 2
3 4
5 6
Type Analog-adjustable
1 2
3 4
47