Hayward CAT 6000 CAT 6000 Owners Manual - Page 41

TDS Sensor Specifications P/N PRO65 Description Range Accuracy Temp Range Temp compensation Temp Output Flow range Max pressure Response Time Wetted Parts Calibration Frequency Total Dissolved Solids Sensor TDS Range: 500 - 7500 ppm ± 15% 10°C to 42°C Yes Thermistor 10K @ 25°C 0.3 to 50.0 GPM 29.4 psi (2 bars) < 15 minutes to 80% of final value at 25ºC PVC, Stainless Steel Electrode, Medical grade epoxy Calibrate as necessary depending on application and flow cell geometry TDS Sensor Acclimation When a TDS sensor is first installed in a new body of water it needs time to acclimate prior to being used. The suggested sensor acclimation time is 1 hour, for which the sensor needs to be installed in the flowcell, in flow and connected to the TDS sensor input of a powered CAT 6000 controller. TDS Sensor Calibration After the acclimation period the TDS sensor must be calibrated. Calibration should be made when the TDS levels are relatively stable, as indicated by CAT 6000 display and manual measurement using a TDS meter. The calibration is ideally made near the desired TDS level for the body of water that the CAT 6000 will be monitoring. Do not calibrate the sensor below 500 ppm TDS. Initial calibration of the sensor may require daily calibrations until the desired tolerance is achieved as compared to manual measurement. The calibration should be checked periodically, after changes in temperature or flow, and after any drastic changes in water chemistry. See the CAT 6000 operations manual for instructions on how to calibrate the sensor. TDS Sensor Storage In order to protect the sensor tip from physical damage, the sensor should be stored in the sensor cap. It is not necessary to store this sensor with water in the cap. The acclimation and calibration procedures will need to be repeated at the beginning of each season or after prolonged storage periods. TDS Sensor Cleaning The sensor should be inspected periodically for damage or debris on the sensor wires. If the sensor has been behaving erratically or when it has been in prolonged storage it may need to be cleaned. If any debris is noted, it should be gently wiped from the wires with a paper towel. Any physical damage to the sensor wires may result in a malfunctioning sensor, which must then be replaced. 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. 40 USE ONLY HAYWARD GENUINE REPLACEMENT PARTS