Hydro Instruments 210 Series, Инструкция по эксплуатации

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IX. MAINTENANCE AND CLEANING
The quality of the water greatly eff ects the frequency of cleaning that is required. Cleaning requirements
will be diff erent at each installation. Visually checking the condition of the analyzer regularly is the best
way to determine the required frequency of cleaning.
1. Inlet Filter Screen and Weir : Regularly check the inlet fi lter screen and weir condition. If it is found
to be dirty, then lift out the weir and fi lter screen and clean them with clean water before reinstalling
them.
2. Flushing the Measurement Cell: If water will not fl ow through the measurement cell then follow this
procedure to fl ush it:
a. Turn off the power to the analyzer.
b. Remove the fl ush plug in the fl ow tube and allow to drain.
c. Reinstall the fl ush plug.
d. Repeat as necessary before turning the power back on.
3. Reagent Valve: If reagent is not feeding then fi rst be sure that all air bubbles are removed from the
reagent feed tubing. To check if reagent is feeding, mark the level on the reagent bottle and wait for 8
hours before rechecking. If the level does not change in 8 hours, then the reagent valve needs to be
cleaned as follows:
a. Turn off the power to the analyzer.
b. Stop the sample water fl ow.
c. Raise the reagent bottle about 2" and then pull down the valve stem in the cap to plug the hole
before removing the bottle.
d. Hold reagent bottle upright and remove the cap. Place the bottle near the tubing connector to the
adapter. Remove the tubing connector nut, remove the tubing and allow reagent to drain into the
bottle.
e. Remove the fl ush plug to drain the measurement cell. Then replace the fl ush plug.
f. Remove the adapter and o-ring by loosening the four screws that secure it to the body.
g. Clean out the bottom body as needed.
h. You will see that the reagent feed valve components are mounted to the adapter. Loosen the
screw and rotate the spring to allow the star wheel to be removed. Do not remove the bushing or
the o-ring.
i. Clean the parts with clean water. If the 1 ⁄
16
" diameter holes in the star wheel are clogged, then use
a straight pin being careful not to scratch or damage any surfaces or edges.
j. Reassemble the star wheel assembly. Reinstall the adapter and o-ring onto the bottom body.
Reinstall the reagent tubing and tubing connector securely.
k. Reinstall the reagent bottle.
l. Restart operation of the analyzer as described in Section IV.2.
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