Xylem WQ pH SENSORS - Manual (Page 16)

Global Water
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• globalw.com
- 16 -
IX. Maintenance
a. Global Water recommends verifying the calibration every 6 months
unless specified otherwise.
b. The sensors must be cleaned periodically. The suggested cleaning
rate depends on the installation area. In dirty areas the sensor should
be cleaned weekly. In a clean area they can be cleaned yearly. Begin
by checking them after the first week, then wait one month if
appropriate and so on. All sensors can be cleaned using water and
liquid dish soap. A small amount of bleach can be added if there
appears to be algae growth. Clean glass membranes with a Q-tip,
soap, water, and bleach. Electrodes should be cleaned with a bristle
brush, soap, and water.