Hayward HydroRite UVO3 Troubleshooting Manual page 21

Calibrating the HydroRite (cont.)
NOTE: Calibration takes 30 minutes, once calibration is complete the system will
report either a 'P' (pass) or an 'F' (fail).
Step 5 Step 6
While the system is calibrating, the screen will Once calibration is complete a 'P' (pass) or 'F'
cycle between a countdown & 'CAL'. (fail) will appear, press enter to accept.
Step 7
The screen should now show 100 (100%), the
new readings are now recorded.
IMPORTANT: Prior to Calibrating the HydrorRite, the water MUST be balanced (including
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target free chlorine levels between 1-3ppm).