Common Troubleshooting of Thunder Magnetic PHS-3E pH Meter

How much do you know about Thunder Magnetic PHS-3E pH meter? In response to this topic, I will give you a little understanding and analysis. 1. After the power is turned on abnormally, if the display does not light up, check whether the power supply has voltage output. After power on, when the display shows 'ErrAfter repeated operation several times, it will generally automatically pass the instrument self-test. If the problem cannot be solved, please contact professional maintenance personnel in time. After power on, if the word 'Err' is displayed in the mV area of u200bu200bthe display screen, but the temperature is displayed normally, it may be that the input potential exceeds the measurement range, and the observer can insert the random short-circuit plug into the electrode socket. 2. Abnormal measurement In the measurement state, if the observer presses the 'pH/mV' key, but cannot switch to the pH measurement state normally, it may be that the pH measurement range exceeds ±20.00pH, and the input signal needs to be reduced at this time. Or insert the short-circuit plug equipped with the machine into the electrode socket for inspection. In the measurement state, if the reading is inaccurate, it is usually caused by the passivation of the electrode. At this time, the measuring end of the electrode should be soaked in hydrofluoric acid with a concentration of 4% for 3~5s, then rinsed with distilled water, and finally soaked in a hydrochloric acid solution with a concentration of 0.1mol/L to restore it as new. 3. When calibrating the instrument with other faults, if the positioning and slope cannot be calibrated to the value of the standard buffer solution, and the value keeps jumping, it may be caused by the following reasons: (1) There are air bubbles in the composite electrode; (2) The composite electrode is aging ; (3) The potentiometer inside the pH meter is damaged. Business personnel can deal with it by throwing the electrode to remove air bubbles or replacing the electrode. The above content is about the Thunder Magnetic PHS-3E PH flowmeter organized by Xiaobian for you. The fault adjustment of this flowmeter is the way to answer the above questions. If you also have good opinions and suggestions, please feel free to expand with Xiaobian. Oh discuss.
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