Detailed Description of the Use Method of the Metal Hardness Tester

Hardness is an important monitoring indicator of water quality. By monitoring the water quality, you can know whether it can be used for industrial production and daily life. For example, water with high hardness can cause soap to precipitate and greatly reduce the effectiveness of detergents; water with excessive hardness in the textile industry makes textiles rough and difficult to dye; burning boilers can easily block pipes and cause boiler explosion accidents; high-hardness water tastes bad and has a bitter taste; after drinking, even gastrointestinal functions are affected; high-hardness water feeding livestock can cause abortion in pregnant animals. Therefore, the study of the measurement method of water hardness cannot be ignored. The applications of water hardness analyzers are also very wide, such as surface water monitoring/ultra-pure water, steam and condensate, ion exchange systems, boiler feed water, surface water analysis, drinking water analysis, industrial water monitoring, etc.

The hardness analyzer is a rate instrument that uses the principle of titration colorimetric method to detect the total hardness of water online for a long time. The water quality hardness tester is a process type, which continuously monitors the softened water hardness online in real time; it is equipped with an over-limit automatic alarm function, which has the advantages of accurate, real-time and low labor cost in replacing manual detection.

How to use the hardness analyzer
1. Instrument power test
A) Calcium ion selective electrode needs to be activated before use, and it can be placed in 10mmol / LCa solution for 30-40 minutes;
B) Turn off the lower emptying pipe of the sampling tank with a ball valve;
C) Pour distilled water into the sampling tank, so that the lower end surfaces of the two electrodes are immersed in the water;
D) Turn on the power and insert the plug of the calcium ion selective electrode into the self-locking jack;
E) The red digital tube is on, and it is displayed as -mv;
F) The above value is displayed, indicating that the instrument and sensor are normal. If it is not correct, please activate the calcium ion selection electrode again and re-test to see if it is normal;
G) Eject the plug of the calcium ion selective electrode from the self-locking jack.

2. Calibration
A) The distilled water in the sampling tank is discharged through the ball valve of the emptying tube;
B) Pour the standard calcium ion concentration solution (the user determines the required standard value configuration);
C) Turn the selector switch to the standard, at this time the red digital tube display value is the standard calcium ion concentration value, which is the over-standard alarm value;
D) Eject the plug of the calcium ion selective electrode from the self-locking jack;
E) Discharge the standard solution in the sampling tank through the ball valve of the evacuation tube, rinse the electrode and the sampling tank with distilled water, and empty the cleaning solution.

3. Measurement
A) Enter the produced water from the ball valve into the sampling tank to maintain a certain amount of water;
B) Turn on the power and insert the plug of the calcium ion selective electrode into the self-locking jack;
C) Set the switch to measure; at this time, the red digital tube display value is the calcium ion concentration value of the produced water, such as exceeding the standard, sound and light alarm;
D) Eject the plug of the calcium ion selective electrode from the self-locking jack;
E) The measurement liquid in the sampling tank is discharged through the ball valve of the evacuation tube, the electrode and the sampling tank are washed with distilled water, and the cleaning liquid is vented;
F) Put distilled water again so that the water surface is higher than the lower end surfaces of the two electrodes.

The application fields of the water hardness test meter include monitoring the operation status of water preparation facilities of power plants, monitoring the operation status of water spray and well water softening facilities, of boiler water in power plants, quality control of turbine condensate in thermal power plants, and water quality control of food / beverage industries.