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10
APPLY POWER TO THE D20
Before starting up the display/controller, ensure adequate flow through the flow cell. Plug the D20 power cable
into a power outlet.
MONITOR THE D20 START-UP PROCESS
On the display panel, press on the buttons below the display window to select and enter values on the D20:
As the D20 powers up, the display shows a series of status messages like the following:
When the D20 power-up is completed, the sensor will start its start-up sequence (L). Once completed, all
pertinent sensor information is displayed (R):
Verify all sensor values displayed on the D20. If pH requires calibration, perform that step first before
continuing. Check the Chlorine level using a handheld pocket colorimeter and adjust the calibration as needed.
SET TIME OF DAY
Select the time of day: