24
838 Advanced Sample Processor
, Installation
1 Detaching the tubing cartridge(s)
Detach the tubing cartridge(s)
48
by pressing in the snap-
action lever
51
on the retaining bracket and disengage it
(them) from the retaining cam
53
.
2 Fitting the pump tubing
Press the contact pressure lever
49
of the tubing cartridge(s)
fully down.
Insert one length of pump tubing into the tubing cartridge(s)
as shown above.
The stopper
57
must engage in the corresponding fixture at
the top of the tubing cartridge.
3 Fitting the tubing cartridge(s)
Engage the tubing cartridge(s) in the retaining cam
53
and
press it (them) down until the snap-action lever
51
on the re-
taining bracket
50
engages, see
Figure 7
. Ensure that the
pump tubing is not kinked.
4 Fitting the coupling on the pump tubing
Connect the PEEK coupling
55
to the
aspiration end
of the
pump tubing
56
(see illustration below).
Fit the PEEK coupling
58
with 6.2744.160 tubing guard onto
the
delivery end
of the pump tubing
56
. In order to do this,
dismantle the tubing guard and slide the union nut first, fol-
lowed by the thrust piece, onto the tubing.
Connect the tubing to the PEEK coupling and screw the union
nut onto the coupling to lock the tubing.
5 Fitting the filter unit
Using two 6.2744.010 PEEK pressure screws
54
and a sec-
tion of aspiratory tubing/capillary
26
(6.1803.0X0), screw the
optionally available 6.2821.120 PEEK filter unit
59
onto the
6.2744.160 PEEK coupling
58
at the outlet end of the pump
tubing
56
.
Correctly set the contact pressure:
Push the contact pressure lever
49
up until the solutions are just being
aspirated. Then push the contact pressure lever one more detent posi-
tion up to achieve an optimum contact pressure.
The delivery rate of the peristaltic pump primarily depends on the in-
side diameter of the pump tubing
56
, besides the correct contact pres-
sure. Different pump tubings are used depending on application.
The table on the following page provides information on the characteris-
tics and use of the available pump tubings.