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Isco 4700 Refrigerated Sampler
Section 2 Installation
2.4.2 24 Bottles
2-6
6. Push the distributor arm up onto the keyed shaft and
secure it with the knurled nut.
7. Push the loose end of the discharge tube onto the bulkhead
fitting in the top-front corner of the refrigerator.
8. Inspect the discharge tube:
An incorrectly installed discharge tube can cause the distribu-
tor arm to fail. It can also cross-contaminate samples. To pre-
vent these problems, inspect the discharge tube as described
in the following steps.
a. Manually rotate the arm to make sure that the tube
does not obstruct its movement. If the tube obstructs
arm movement, re-route the discharge tubing.
b. The discharge tube must slope downward from the
bulkhead fitting to the arm throughout the range of
arm motion. Otherwise, liquid might pool in the tube
and cross-contaminate samples.
Note that the discharge tube has a natural curve.
Should the tube create a low spot where liquid can pool,
twist the end of the tube connected to the bulkhead fit-
ting so that the natural curve holds the tube in a down-
ward sloping position. Then, retest the tube at other
arm positions.
Note
You can order replacement discharge tubes from Teledyne
Isco. Order part number 60-9003-279 for a single tube. You
can also order bulk tubing rolls from which you can cut to 20
inches (51 cm). Order part number 68-6700-046 for a 10-foot
roll; 68-6700-047 for a 50-foot roll.
The 24 bottle configurations use a rack to hold and align the con-
tainers. To install the bottles in the refrigerator using the rack:
1. Place the uncapped bottles in the rack (Figure 2-3).
2. If you are using 350 ml glass bottles, compress the retain-
ing ring and place it in the center of the bottles. Release
the ring and the outward force of the ring will secure the
bottles. (The polypropylene and ProPak
a retaining ring.)
Note
Bottle caps can be stored in the center of the bottle rack.
3. Locate the back of the rack (arrow, Figure 2-3). This end
has a notch that fits a key on the refrigerator's rear wall.
4. Lift and insert the back of the rack into the refrigerated
compartment.
CAUTION
®
bottles do not use
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