5. MAINTENANCE
A. SET UP A MAINTENANCE PROGRAM FOR
YOUR CONTROLLER.
Normally, the electronic circuitry in the controller will not require maintenance.
However, ambient temperature, humidity changes, and aging can affect the cali-
bration of the controller. Electrodes will become dirty over a period of time and
will require cleaning. The frequency of cleaning depends on the installation and
the water that comes in contact with the electrode.
During the first few months of operation, check the electrode each week. This
allows you to determine how often to clean the electrode. After the first few
months of operation, you will be able to establish a proper maintenance sched-
ule for your system. Check the electrode and controller calibration at least once
every two months. The more frequent the maintenance, the more assurance you
have of reliable controller performance.
By observing readings before and after electrode cleaning, you can determine
how often to clean the electrode. If no change or only a small change in read-
ings occurs, clean the electrode less often. If a large change in readings occurs,
clean the electrode more often. See Cleaning the Electrode on page 11 of this
manual.
B. ACCURACY AND READINGS
The conductivity of any solution changes with the temperature of that solution.
Without some method to compensate for these changes, a unit will consist of
the conductivity caused by the particular level of dissolved solids, plus or
minus the effect of temperature. The ABC 50 Controller is not compensated for
temperature. The user is responsible for maintaining consistent probe tempera-
tures at calibration and during operation.
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