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V. MAINTENANCE
The electrochemical cells of the CAL 2000 require periodic maintenance
to provide optimum performance. It is recommended that the electrolyte
solution be replaced on an annual basis for most gases generated by the
CAL 2000. The exception to this is the ClO2 electrolyte. Please refer to
the instructions enclosed with every chlorine dioxide cell or replacement
electrolyte pack.
If the instrument is returned with the cell on an annual basis to maintain
NIST certification, the electrolyte will be replaced by the factory.
The following steps should be taken to replace electrolyte.
........
a. Remove cell as described in section I. General
Description: Cell Installation and Removal.
........
b. Unscrew solid fill plugs on reservoir and
remove liquid.
........
c. Use syringe (provided with electrolyte) to add
liquid to within 1/8 inch from the bottom of fill hole.
Warning: Do not over-fill reservoir. Trapped air must be allowed to
escape through vent plug as fill screw is replaced. Contact the factory
for more information.
.......
.
d. Replace fill plugs.
CAUTION
Both the electrochemical cell and the alkaline batteries used in the CAL
2000 instrument contain corrosive chemicals. In addition, depending on
the type of cell being used, the gas being generated can be corrosive. The
design of the instrument takes this into consideration, and the 300 second
purge cycle allows the corrosive gases to be swept out of the instrument.
It is important not to remove the generating cell before this purge cycle is
completed. While it is not expected that the chemicals in the cell or alkaline
batteries will leak during normal operation, it is recommended that both the
generating cell and the alkaline batteries be removed from the instrument
if it is being stored for periods longer than one week between use.
