7-7
+
&
The buffer and calibrator pumps in the 2700 SELECT are peristaltic tubing pumps. The tubing
life depends on instrument usage. The pump tubes should be replaced at least every 6 months,
more frequently if necessary. Other tubes become loose at the fittings and should also be
replaced every 6 months.
Figure 7.2
Tubing Connections
Remove the screws holding the buffer and calibrator pumps to the instrument wall and remove
the pumps. Remove the front housing from each pump by pulling it out at the bottom. Remove
the roller assembly and tubing from each pump. Disconnect and remove all the instrument
tubing. New tubing is supplied in the Preventive Maintenance Kit. Connect the new tubing as
shown in Figure 7.2.
When installing new pump tubing, insert the roller assembly into the rear pump housing (rollers
facing out). Starting on one side, place the tubing between the pump housing and roller as
shown in Figure 7.3.
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