Hach AS950 Instalación Y Mantenimiento Básicos página 25

7.4 Replace the distributor arm tube
The distributor arm moves over each bottle during multiple bottle sampling. Replace the tube in the
distributor arm when the tube is worn. Make sure that the correct tube is used for the correct
distributor and distributor arm.
Note: The distributor tubing is not the same as the pump tubing. The pump tubing installed in the distributor
assembly can damage the distributor. Also, samples can be missed because the distributor arm cannot move
easily.
1. Remove the tube from the distributor arm and from the ceiling of the sampler cabinet.
2. Insert the new tube into the distributor arm. Extend the tube past the end of the distributor arm
4.8 mm (3/16 in.) or 19 mm (3/4 in.) as shown in item 1 of
3. Insert the other end of the tube into the fitting on the ceiling of the sampler cabinet.
4. Complete the diagnostic test for the distributor to make sure that the operation is correct.
Figure 15 Distributor assembly
1 Tube extension
2 Nozzle
3 Distributor arm
7.5 Replace the power supply—refrigerated sampler
Fire hazard. Use only the external power supply that is specified for this instrument.
4 Distributor arm lengths:
152.4 mm (6.0 in.),
177.8 mm (7.0 in.) or
190.8 mm (7.51 in.)
5 Distributor motor
6 Shaft
W A R N I N G
Figure 15.
7 Distributor tube
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