Electro-Chemical Devices (ECD) SMS22 - Manual (Page 30)

e. Polish the electrode for about 30 seconds and examine the tip for a shiny metallic
surface, repeat if necessary.
f. Rinse the electrode with distilled water and soak the electrode in a low ppm Calibration
solution.
g. Perform a Two Point Calibration.
Storage
The method for Storage of the sensor is dependent on time.
For short term storage of several days the sensor can be stored inside the flow cell. No special
consideration is needed. Stop the analyzer and manually actuate the drain, this will leave a trace
amount of moisture in the flowcell and keep the sensors from dehydrating for a few days.
For periods greater than 3-4 days the sensors must be removed from the flow cell, cleaned and stored in
the protective shipping cap filled with salted tap water (1 teaspoon table salt in 4 oz of tap water).
5.2 Peristaltic Pumps
The Reagents pumps and Sample pump use high performance tubing designed a one year service life
when measuring clean water samples. Oily/greasy samples will degrade the tubing performance
requiring replacement of the tubing and pump heads in a shorter period of time.
The standard service kit contains two reagent pump heads, and a full set of tubing and fittings required
to rebuild the analyzer.
DANGER: Read any precautions and the (MSDS) datasheets, wear protective gloves,
clothes and glasses before handling chemical products.
Hazard of severe burns or injury due to handling of dangerous chemicals
5.2.1 Preparation for Pump/Tubing Service
The SMS-22 uses two hazardous chemicals during the analysis, 10% Potassium Hydroxide and 10%
Hydrochloric Acid. These solutions must be rinsed from the system before any maintenance to the
reagent pumps or tubing is performed. It is recommended to perform this rinsing procedure before
servicing any of the pumps or tubing.
1. Turn OFF the power to the Analyzer
2. Turn OFF the Sample Feed Line
3. Position an open 1 liter or larger container of distilled water (tap water is OK to use) near the
reagent containers.
4. Disconnect the sample feed tubing from the Sample Conditioning cell and place it in the
container of distilled water.
5. Remove the 16% KOH reagent feed tube from the carboy and place it in the container of
distilled water.
6. Remove the 7.5% HCl reagent feed tube from the carboy and place it in the container of distilled
water.
7. Set the Control switches to RUN and PRIME
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