Rosemount PH probe failure
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This post was last edited by lrtlrtlrt on 2020-2-28 09:38. Hello everyone! Our company’s process system is equipped with a PH online monitoring circuit that has been in use for 2.5 years. It is showing the fault indicated in the diagram; what exactly are the problems? Also, is there a Chinese electronic version of the manual for this pH electrode and pH transmitter? Thank you for sharing this with me, many thanks!
This post was last edited by tiger2010 on 2020-2-28 at 10:19. For such fault alarm codes, if the wiring has been checked and is fine, it’s possible that the glass electrode was tightened too much and thus broke
It’s just that the probe is broken; you can buy a replacement for it. If you don’t believe me, take a look at the glass ball
It’s just that the probe is broken; you can buy a replacement for it. If you don’t believe me, take a look at the glass ball
Taking it apart to take a look, it seems the glass ball is damaged. The digital display device I have isn’t as good as yours; it doesn’t even indicate where the problem lies. It took 2 and a half years before it broke; the quality is quite good. I’ll have to replace it in about a month now – the glass balls have shattered and the flow rate of the medium isn’t fast enough.
PH is originally a consumable item; it’s good that it has held up this long. There are hints on the table header; just replace it.
This message appears because the analyzer has detected that the high impedance between the inside of the glass electrode and the medium has disappeared; in other words, there is now a connection between the inside of the glass electrode and the medium. Theoretically, there should be a glass bulb in between, so it can be removed to check – if the bulb is not broken, it should at least have some cracks. It seems that your electrode should be the 396P model; information can be found on Emerson’s official website. https://www.emerson.cn/zh-cn, select Automation Solutions – Products – Liquid Analysis; choose model 1066 under Transmitters and series 396 under pH
The glass electrode is damaged, which disrupts the ionic diffusion equilibrium and results in a potential value that is outside the acceptable range; replacing the electrode tip is necessary, as it is a consumable item
The pH meter probe needs to be replaced; it basically has to be changed on a regular basis.