Hach-Lange SIGMA SD900 Refrigerated Sampler and All Weather Refrigerated Sampler User Manual - Manual (Page 36)

34
Installation
3.3.3.4 Distributor installation
CAUTION
Pinch hazard. Make sure the sampler is powered off before
removing or installing the distributor assembly.
The distributor automatically moves the sample tube over each
bottle during multiple bottle sampling. The distributor assembly is
typically installed at the factory. Complete the following steps to
install a new or different assembly.
Prerequisites:
• Distributor assembly—three assemblies are available. Refer to
Figure 3 on page 11 or Figure 4 on page 12 to make sure that
the correct distributor assembly is used.
Installation procedure:
1. Slide the two slots in the distributor assembly housing under
the retainer pins located on the top inside surface of the
refrigerator (
Figure 17 ).
2. When fully seated, hand-tighten the thumbscrew on the
distributor assembly to hold the distributor in place.
3. Push the distributor tubing on the sampler fitting on the top
inside surface of the refrigerator ( Figure 17 ).
4. Connect the distributor cable to the controller cable. Attach the
cable assembly to the twist clip to ensure the cable does not
interfere with the motion of the distributor arm.
5. To make sure that the arm has sufficient freedom of movement,
hand-rotate the arm in a circle (both right and left) until it hits
the arm stop. If the arm does not rotate freely, reposition the
tubing to the other side of the arm so that the arm can rotate.
Note: Do not force the arm past the arm stop. The arm stop prevents
the arm from rotating more than 360 degrees and pinching the tubing.
6. To make sure that the distributor is aligned properly, run the
manual distributor diagnostic (see section 7.3 on page 90 ).