Residual chlorine analyzerIt is an instrument for continuous detection, control, and recording of free chlorine in water. Composed of a controller and a chlorine measurement system. The chlorine measurement system consists of a chlorine sensor, a flow regulator (flow regulator), and a filter (optional). The water sample to be tested first flows into the stabilizer, then into the chlorine sensor, and finally flows away through the drainage pipe. In addition to measuring and displaying, the controller also has the functions of alarm and 4-20mA output.
Setting and operation of residual chlorine meter
1. Upper limit alarm setting
Press the "" key to turn on the "H-SET" upper limit alarm setting light, and use a screwdriver to correspond to the "H-SET" upper limit alarm setting knob. Gently rotate left and right to make the display window show the value you need.
Note: The upper limit alarm setting value cannot be less than the lower limit alarm setting value.
2. Lower limit alarm setting
Press the "" key to turn on the "L? SET" lower limit alarm setting light, and use a screwdriver to correspond to the "L? SET" lower limit alarm setting knob. Gently rotate left and right to make the display window show the value you need.
Note: The lower limit alarm setting value cannot be greater than the upper limit alarm setting value.
3. Positioning calibration of instruments and sensors
Press the "" key to turn on the "mg/L" working status light. Add deionized water into the system and wait for the instrument display to stabilize. Use a screwdriver to gently rotate the "STAND" positioning regulator left and right to display the 0.00 value on the display window. Note: When calibrating the sensor, calibrate the temperature of the calibration solution at 25C.
4. Slope calibration of instruments and sensors
After the zero point calibration of the instrument is completed, the known solution * or sample solution is introduced into the system, and the "SLOPE" slope adjuster is gently rotated left and right with a screwdriver to display the residual chlorine value of the known solution * or sample solution on the display window.
Note: The residual chlorine value of the known solution * can be obtained by colorimetric method. Dissolve the standard powder in the test solution and place it in a colorimetric tube. After one minute, wait for the color to stabilize and compare it with the standard colorimetric paper to obtain the result.
The residual chlorine value of the sample solution can be obtained by laboratory analysis methods.
5. Start up
Power on the analyzer and open the valve to allow the water sample to flow into the chlorine measurement system, ensuring that the inlet pressure is within the range of 0.05-0.40 MPa. Check for leaks in the inlet and outlet pipes and chlorine measurement system, and correct them if necessary. Remove the cover at the top of the chlorine sensor and use a bone spoon to pour about 0.3g of quartz sand into the water. The quartz sand should sink to the bottom of the pool. The water flow rate through the chlorine sensor should be large enough to allow sand particles to quickly circulate around the base of the chlorine sensor, but not large enough to cause quartz sand particles to be drained out of the pool. If the flow rate is not suitable, the water sample flow rate can be adjusted by adjusting the valve.