Hayward CAT 6000 CAT 6000 Owners Manual - Page 40

Chlorine Sensor Acclimation When a Chlorine sensor is first installed in a new body of water it needs time to acclimate prior to being used for control. The suggested sensor acclimation time is 48 hours for which the sensor needs to be installed in the flow cell, in flow and connected to the Cl sensor input of a powered CAT 6000 controller. Chlorine Sensor Calibration After the acclimation period the Chlorine sensor must be calibrated. Calibration should be made when the Chlorine levels are relatively stable and not varying by more than .1 ppm in a 30 minute time period as indicated by CAT 6000 display and manual measurement methods such as DPD. The calibration ideally is made near the desired set point level of the Chlorine for the body of water the CAT 6000 will be controlling. Do not calibrate the sensor below 1 ppm of Chlorine. Please note the Cl sensor is not intended for chlorine control under 2 ppm. Ensure that temperature and pH are also stable and calibrated. pH should be at a normal desired level of 7.4 to 7.6 before calibrating the sensor. Never calibrate the sensor when Chlorine levels are transitioning rapidly up or down due to manual dosing. A minimum TDS level of 2000 ppm's is suggested for best results. Initial calibration of the sensor may require daily calibrations until the desired tolerance is achieved as compared to manual measurement methods such as DPD. The sensor calibration needs to be evaluated after changes in temperature, flow and chemistry changes. The calibration then needs to be checked every 4 to 10 days and calibrated as needed. See the CAT 6000 operations manual for instructions on how to calibrate the sensor. Chlorine Sensor Storage Exposure to atmospheric conditions will cause the sensor tips to dry out. Always remove and properly store the sensor in the soaking cap with clean water and the provided battery pack (originally shipped with the controller) attached to the sensor if the sensor is to be removed or stored for one hour or longer. Although Chlorine sensor is freeze-resistant, they must be protected from freezing temperatures when not in use. Replace the battery in the sensor battery pack each season or every 90 days. The acclimation and calibration procedures will need to be repeated at the beginning of each season or after prolonged storage periods. Chlorine Sensor Cleaning The sensor should be inspected periodically for discoloration of the gold and platinum sensor wires, for damage to the protective tube covering the platinum sensor wire and any physical damage to the sensor. If discoloration is present, the sensor has been behaving erratically or when it has been in prolonged storage it may need to be cleaned. If the sensor requires cleaning, ensure that it is connected to a sensor battery pack (Hayward P/N CAX-6005) after disconnecting from the CAT 6000 controller. If the sensor has been in storage for a prolonged time and has a sensor battery pack already attached, replace the battery before cleaning. The sensor is cleaned by soaking in a 5% hydrochloric acid (muriatic acid) solution until the discoloration is removed. Usually, a five minute soak is sufficient. The sensor should then be briefly rinsed with tap water and re-connected to the controller. Do not touch or rub the protective covering on the platinum sensor wire as this may damage the sensor and require sensor replacement. After cleaning, the sensor should go through the normal acclimation and calibration processes before it is fully functional. If abnormal behavior persists, the sensor may need to be replaced. 39 USE ONLY HAYWARD GENUINE REPLACEMENT PARTS