Hach-Lange Sigma SD900 Portable - Manual (Page 28)

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Installation
3.3.3.5 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 2 on page 9 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 center
section (
Figure 12 ).
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 center section ( Figure 12 ).
4. To make sure that the arm has sufficient freedom of movement,
hand-rotate the arm in a circle (both clockwise and
counterclockwise) 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.
5. Install the mid section on the base.
6. To make sure that the distributor is aligned properly, run the
manual distributor diagnostic (see section 7.3 on page 67 ).