8 installing the sample path, 1 fitting the pump tubing for sample, Installing the sample path – Metrohm 761 SD Compact IC User Manual
Page 31: Fitting the pump tubing for sample, Ction 2.8.1 )
2.8 Installing the sample path
761 SD Compact IC / Instructions for Use 8.
761.1043
23
2.8
Installing the sample path
The sample is aspirated with the peristaltic pump from the sample ves-
sel into the injection valve and finally ejected into a waste container.
See Section 2.9. for connection of the 766 IC Sample Processor
(supplied together with instrument version 2.761.0520).
2.8.1
Fitting the pump tubing for sample
The second channel of the two-channel peristaltic pump is used to
pump the sample. Fit the pump tubing 64 6.1826.110 as follows:
1 Disengage the tubing cartridges
•
The tubing cartridge for the pump tubing should still be out-
side from installing the regenerant path. If not, remove it as
specified in Section 2.7.1.
•
Plug a coupling 63 6.2744.030 onto the left-hand of the pump
tubing 64 6.1826.110. Lightly moistening the tip of the cou-
pling will make it easier to slip on.
3 Fit the coupling with tubing security device 65
Fit a coupling with tubing security device 65 6.2744.160 onto the
right-hand end of the pump tubing 64 6.1826.110 (see Figure
10):
•
Dismantle the tubing security device and first slide the un-
ion nut and the thrust piece onto the tubing.
•
Plug the tubing onto the coupling and screw the union nut
onto the coupling in order to lock the tubing.
4 Insert the pump tubing
•
Insert the fitted pump tubing 64, as shown in Figure 10, into
the tubing cartridge. The left-hand stopper 62 should engage
in the corresponding fixture on the left-hand side of the tubing
cartridge when doing this.
5 Reengage the tubing cartridge
•
The tubing cartridge with the pump tubing 61 for the regener-
ant path should already be engaged (see Section 2.7.1).
Slide it to the rear.
•
Engage the tubing cartridge with pump tubing 64 for the
sample path at the front into the retaining bracket. Engage it
at the left first and then push the right-hand side down until
the snap-action lever 59 engages. Ensure that the pump tub-
ing is not kinked when doing this.