Problem of deviation in liquid level measurement data for sodium hypochlorite storage tanks

1. Whose “intelligent pressure-type level transmitter” was stolen? 2. What kind of intelligent pressure-type level transmitter with such a design structure? Draw a rough sketch of the installation and take a photo to share it; this way everyone can take a first look before we can conduct a targeted analysis. Otherwise, people will make random guesses and analyses that will only confuse you {:3_51:}

What was said on the first floor makes sense. If the liquid level is rising steadily, the process also needs to be checked, not just the instruments.

Is it a crystal? Impact measurement. It doesn’t matter whose it is

Apart from PVC, what materials are used for this storage tank and pipelines, with a chlorine content of 10%/12%?

Brand: Nissan Yokogawa and Nissan AZBIL. Type: Intelligent pressure-type level transmitter with a single flange and diaphragm. Installation: Installed at a height of approximately 20 cm below the bottom of the storage tank. Storage tank: Open type, connected to the outside environment (with an exhaust port on the top for connection to the atmosphere); there is only one dosing pump outside the tank used to add chemicals to the system, and the material in the tank is supplied by external suppliers using tank trucks (once every 3 days). Material: Sodium hypochlorite, with a relative water density of 1.1

1. Oh. . . . It’s that damned Japanese watch. 2. The density of the solution remains almost constant; even if different batches produced by different manufacturers have slight variations in concentration, in the worst-case scenario, the fluctuation in solution density should not exceed ±2.5%. 3. As for the “measurement values,” they keep increasing and drifting further away from the actual values. 4. Ugh, what’s wrong with this damned Japanese watch? I guess it’s caused by instability in the system, with fluctuations in performance at different times. Such fluctuations can be categorized as zero-point drift and full-scale (sensitivity) drift. For zero-point drift, it can be corrected through calibration or adjustment; for full-scale drift, you can first set a known liquid level for the instrument, observe the corresponding pressure reading, determine the actual relationship between them, and then use this relationship to recalculate the range value before setting it again. Note: Before correcting full-scale drift, zero drift must be corrected first. 6. Time drift is an inherent characteristic of the instrument; in other words, the adjustments we make can only provide temporary relief and not a permanent solution. If the time drift of the instrument is too severe, then the original poster should just defeat those Japanese dogs {:3_51:}

7. Additionally, if the instrument keeps drifting in one direction – for example, if the measurement values keep increasing or keeping decreasing – it’s possible that there is a slight leak in some part of the instrument, perhaps a leak of oil. In such a case, the instrument won’t be able to function properly for long; it will eventually stop working altogether. . . Micro-leaks cannot generally be detected by eye; it is necessary to install the gauge on a pressure calibration bench and maintain a constant pressure for an extended period of time in order to identify them.