Teledyne 356WA - page 26

Teledyne Analytical Instruments5-4

5 Maintenance & 5 Maintenance &

5 Maintenance & TT

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Model 356WAA

not touch it with your fingersnot touch it with your fingers

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 Assembly5.6 Screen Assembly

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 Column5.7 Reservoir and Humidifier Column

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/min50 cc/min

50 cc/min50 cc/min

50 cc/min.

b) Refer to Figure 4-1. Place a small funnel with attached tubing

beneath the drain spout which is located on the underside of the

reservoir. Remove the drain spout cap and allow the reservoir

and humidifier column to drain thoroughly.

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/min50 cc/min

50 cc/min50 cc/min

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