Hach SP-510, User Manual

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C A U T I O N
Chemical hazard. If there is a leak in the fluid system, hazardous substances may leak out of the lower
enclosure. Put the supplied reagent bottle tray or a bucket under the drain to catch any spills.
C A U T I O N
Chemical exposure hazard. Dispose of chemicals and wastes in accordance with local, regional and
national regulations.
Use quick-connect type connectors for ¼-inch OD tubes to install the sample inlet and drain
connections.
1. Install 3 feet of tubing in the ½-inch enclosure drain to keep dust out of the analyzer. Refer to
Figure 1 on page 7, item 11.
Note: Make sure that the enclosure drain is open. The drain must be open to remove sample water if leaks
occur.
2. Push the ¼-in OD poly tube on the sample line connector. The tube will "stop" two times as it is
pushed on the connector. For more information, refer to the installation kit documentation.
3. Make sure that the tubes are pushed completely on the connector. Incorrect installation can
cause the tube to come off of the connector when water pressure is applied.
Note: The sample drain connector will install on ½-inch ID flexible tubes (customer-supplied).
Connect the air purge (optional)
An air purge is necessary in an environment with high humidity or caustic vapors.
Note: Use only dry, oil-free instrument air at 0.42 m
3
(15 standard cubic feet) per hour (scfh).
1. Find the air purge connection on the left side of the instrument enclosure. Refer to Figure 1
on page 7.
2. Remove the plug in the quick-connect fitting.
3. Push the ¼-inch poly tubing into the fitting. Make sure to have two different "stops" so that the
tubing cannot disconnect when air pressure is applied.
Sample line guidelines
Select a good, representative sampling point for the best instrument performance. The sample must
be representative of the entire system.
To prevent erratic readings:
• Collect samples from locations that are sufficiently distant from points of chemical additions to the
process stream.
• Make sure that the samples are sufficiently mixed.
• Make sure that all chemical reactions are complete.
Connect the sample stream
Install the sample line into a larger process pipe to minimize interference from air bubbles or pipeline
bottom sediment. A sample line that goes into the center of a process pipe is best.
Figure 5 shows examples of good and bad methods of sample line installation into a process pipe.
Keep the sample line as short as possible to decrease analysis delay. Sediment can collect in long
sample lines.
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