Hach Chlorine Sensor User Manual

Table of contentsSpecifications on page 3 Maintenance on page 16General information on page 4 Troubleshooting on page 20Installation on page 6 Replacement parts on page 22Operation on page 10SpecificationsSpecifications are subject to change without notice.Specification DetailsMeasurement range 0 to 20 ppm1Lower limit of detection 30 ppb (0.030 ppm)Resolution 0.001 ppm (1 ppb)pH operating range 4 to 9 pH unitsAccuracy(chlorine concentrationswithin ±2 ppm or 20%(whichever is smaller) of thecalibrated point)Free chlorine (0 to 10 ppm):• ± 3% of the reference test2 (DPD) at constantpH less than 7.2 (±0.2 pH unit)• ± 10% of the reference test2 (DPD) at stablepH less than 8.5 (±0.5 pH unit from the pH atchlorine calibration)Total chlorine (0 to 10 ppm):• ± 10% of the reference test2 (DPD) at stablepH less than 8.5 (±0.5 pH unit from the pH atchlorine calibration)• ± 20% of the reference test2 (DPD) at pHgreater than 8.5Specification DetailsRepeatability 30 ppb or 3%, whichever is greaterResponse time Free chlorine: 140 seconds for 90% change (T90)at a stable temperature and pHTotal chlorine: 100 seconds for 90% change (T90)at a stable temperature and pHSampling time ContinuousInterferences Free chlorine: Monochloramine, chlorine dioxide,ozone and chalk depositsTotal chlorine: Chlorine dioxide, ozone and chalkdepositsPressure limit 0.5 bar, no pressure impulses and/or vibrationsFlow rate 30 to 50 L/hour (7.9 to 13.2 gal/hour)40 L/hour (10.5 gal/hour) – optimalPower requirements 12 VDC, 30 mA maximum (supplied by controller)Operating temperature 5 to 45 °C (41 to 113 °F)Storage temperature Sensor: 0 to 50 °C (32 to 122 °F) dry withoutelectrolyteElectrolyte: 15 to 25 °C (59 to 77 °F)Dimensions(length/diameter)195 mm (7.68 in.)/25 mm (0.98 in.)Cable length/type 1 mCable connection 5 pin, M12 connectorMeasurement method Reagentless, electrochemical, amperometric,three-electrode systemCalibration methods 1-point or 2-point (zero and slope) calibrationTemperature compensation Internal temperature sensor1 The chlorine sensors are not applicable for applications with consistently low (< 0.1 ppm) or zero chlorine concentrations.2 The test must be conducted at the analyzer sampling point.English 3