Hach SD900, User Manual

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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 center section.
2. Insert the new tube into the distributor arm. Make sure that the tube is aligned with the
dimensions shown in
Figure 18 .
3. Insert the other end of the tube into the fitting on the ceiling of the center section.
4. Complete the diagnostic test for the distributor to make sure that the operation is correct.
Figure 18 Distributor assembly
1 Nozzle 3 Distributor motor 5 Distributor tube
2 Distributor arm 4 Shaft
Fuse replacement
The fuse is a not a user-serviceable item. Contact technical support. A blown fuse can be an
indication that the sampler has a problem and that service is necessary.
Troubleshooting
General troubleshooting
Table 4 shows causes and corrective actions for several common problems.
Table 4 General troubleshooting
Problem Possible cause Solution
No instrument power with AC Problem with the main power
source. Verify AC power at the electrical outlet.
Defective controller. Contact technical support.
No instrument power with DC Battery is not charged. Replace the battery.
Battery does not hold the
charge. Replace the battery or use an AC power
cord.
Defective controller. Contact technical support.
English 39