5 Maintenance & Troubleshooting | Model 356WA |
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not touch it with your fingers. Avoid any possible contamination of the screen.
c)Cleanse the cell thoroughly in electrolyte solution.
d)Insert the new lead electrode in place in the cell body and secure with lock washers and screws.
e)Carefully install screen assembly and secure with mounting screw.
f)Immerse the cell assembly in hot cleaning solution and then rinse in distilled water.
g)Install prepared cell assembly as described in Section 4.2.3: Cell Installation.
5.6 Screen Assembly
The screen assembly will become discolored after prolonged use due to contamination. When this occurs, and if the cell no longer displays adequate sensitivity, the entire cell assembly must be replaced. Refer to Section 4.2.3: Cell Installation for cell installation instructions.
5.7 Reservoir and Humidifier Column
Approximately once each year the reservoir and humidifier column should be drained and cleaned. Use the following procedure:
a)Reduce sample flow to approximately 50 cc/min.
b)Refer to Figure
c)Replace the drain spout cap, turn the sample flow off, and remove the fill cap on the top of the reservoir.
d)Add a small amount of electrolyte to a pint of warm distilled water. Pour the solution into the reservoir and replace the fill cap.
e)Gently open the throttle valve and permit the sample to flow for five to ten minutes.
f)Reduce the sample flow to 50 cc/min. and drain the solution from the reservoir. When drained, replace the drain cap and turn off the sample flow.
g)Rinse by filling with distilled water and draining several times.
h)If the humidifier column still retains deposits on its walls, it should be removed and cleaned with a brush and suitable cleaner. See
Teledyne Analytical Instruments |