What are the common faults of the electrolyte analyzer?

What are the common faults of the electrolyte analyzer?

Fault one: the slope of the electrode decreases, the slope of the electrode is low, which will result in poor test linearity, and sometimes affect the repeatability of the electrode. The main reasons are: 1. Excessive protein adsorption on the electrode membrane plate; 2. Humidity of the air is too high; The temperature is too low; 4, life expectancy is approaching.

In the fourth case, the user needs to replace the electrode. The first kind can be treated with deproteinized solution. The Na and pH electrodes have a special cleaning solution. The rest of the electrodes can be dissolved in 30m1 0.1M hydrochloric acid to form a protein cleaning solution. The first cleaning function of the service program was used to repeatedly clean the protein, remove the protein, and rinse it several times with a PVC cleaning solution. After calibration, the samples were tested.

The second and third conditions mainly affect the Na and pH electrodes. If the air humidity is too high, the dehumidifier should be used for dehumidification. When the temperature is too low, the temperature can be increased indoors. Without these two conditions, the Na electrode, pH electrode, and signal plate can be heated and dehumidified by a hair dryer before measurement.

Fault 2: Electrode drift and out of control 1. The most common cause of electrode drift is that the ground wire is not connected properly and the ground wire should be inspected; check whether the drifting electrode silver rod is not inserted into the signal socket or is in poor contact. 2, the voltage is not stable, it is best to connect UPS uninterruptible power supply or better quality of the regulated power supply (bad quality of the power supply will cause the electrode drift). 3, to avoid electromagnetic interference, power equipment should be as far away from the instrument as possible, set the power independently. 4. Check whether the standard solution and the cleaning solution have been used up; Check whether the reference solution in the flow cell is too small and should be filled in time. 5, Na, pH electrode drift when using glass electrode cleaning solution cleaning, and then rinse with distilled water can be repeated. 6. If the electrodes are all drifting, check whether the reference electrode has expired. 7. The positioning is not good and the solution is not completely immersed in the electrode. The positioning operation should be performed again. 8. There is a bubble above the reference electrode. Tap the flow cell and move the bubble above the Na electrode. 9, reagent expired or contaminated, check A, B standard solution and cleaning fluid bottle, whether there is flocculent precipitation.

Fault 3: There are mainly four kinds of reasons for poor sample aspiration, which are along the lines of "simple to complex": 1. Check the connections of the pipes (including the connection between the electrodes, the electrodes, and Whether or not there is a leak between the valves, between the electrodes and the pump tubing, this phenomenon is manifested as no aspiration. 2. Check if the pump tube is stuck or overly tired. At this time, replace the new pump tube. The phenomenon is that the pump tube emits an abnormal sound. 3. Protein precipitation occurs in each pipe, especially at each joint. This phenomenon is manifested in unstable positioning of the liquid velocity process. Even if the new pump pipe is changed, the solution is to remove the joints and clean them with water. 4, the valve itself has a problem, we must carefully check.

Fault 4: There are four main reasons for failure of the detector failure detector: 1 The detector's plug and the motherboard board are loose; 2 The detector itself is broken; 3 The fixing screw on the valve core is not tight with the rotating shaft of the motor. Solid in place; 4 spool itself too tight to rotate. The order of inspection is 3-1-4-2.