Why are there no posts about analytical instruments in the forum?
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I noticed that there are no posts on analytical instruments in the industrial control forum; I’m not sure whether I’m looking in the wrong place or if no one has posted anything about them. Analytical instruments are widely used in current chemical processing plants – our company, for example, uses online gas chromatography, magnetic oxygen sensors, infrared detectors, pH meters, dissolved oxygen sensors, conductivity meters, and so on. Although I’m not involved in the development of analytical instruments, I am still interested in them. It’s strange that I haven’t seen any posts from others on this topic. Please give your support; I also hope that experts will help to keep this forum active.
Analytical instruments are indeed used in a wide range of applications, but most of the on-site calibration work is carried out by the manufacturers, so there is very little information available on this topic. I really want to learn more about it*
Online analytical instruments require significant investment, and their lifespan is generally short
Analysis instruments can be posted in the industrial control section; I hope the moderators will support this.
Maintenance of boiler SO2 online analyzers: Calibrate the system regularly. Detect any abnormalities in the data or perform regular span calibration of the system. It is recommended to perform a cross-calibration using a standard gas once a month. After each calibration, close the valve for the standard gas. 1. Adjust the pressure regulators for \"instrument air\" on the front panel of the zero-air generator to 0.6 MPa, those for \"dilution air\" to 0.5 MPa, and those for \"zero standard gas\" to 0.5 MPa. 2. After about 20 minutes, the SO2 analyzer shows that the concentration has reached a stable value. The data collector captures and displays in real time the status of the SO2 analyzer as well as related data, and automatically adjusts the system’s gain factor to complete the zero calibration of the analyzer; during this process, the backflushing of the dilution sampler is also carried out. 3. Through the data collector menu, select “System Operations”, “Manual Calibration”, and “SO2 Calibration”; set the calibration time. The “Calibration Gas 2” light on the front panel of the gas circuit controller will turn on. Repeat the above steps to perform span calibration for the SO2 analyzer. 4. Check whether the flue gas guide pipe and filter are blocked; if the flue gas guide pipe is blocked, try to clear it, and if the filter is blocked, it needs to be replaced. During installation, the long flue gas guide pipe faces the wind, while the short one faces away from the wind. Make sure the gas line connections are correct. Check whether the dilution sampler is functioning properly, and replace its filter elements regularly. 4.1 Inspect the filter: first, stop the diluter, introduce zero gas, disconnect the power supply to the dilution sampler, remove the sintered filter, and unscrew the inertial filter. 4.2 Check the pressure ratio before and after the critical orifice on the display screen of the data collector to confirm that the indicated pressure ratio is less than 53%. If it exceeds 53%, it may be due to insufficient zero gas pressure, leakage at the critical orifice seat, or leakage in the vacuum detection tube or its connections. 4.3 If the filter of the dilution sampler is severely clogged or corroded, it needs to be cleaned. The cleaning steps are as follows: A. The filter can be cleaned with water and a brush; remember not to use a steel brush, as this may damage the filter. B. Blow the inside of the filter with clean air to remove dust from the cartridge. C. Blow dry with zero gas after cleaning. 4.4 Check the O-ring; if it is damaged or aged, it needs to be replaced. 4.5 Check the temperature of the heating strip. When the temperature of the heating strip is below 100°C, flue gas is prone to condensing inside the sampler, causing corrosion to the equipment and potentially clogging the filters as well. The heating element of the dilution sampler is a self-temperature-controlled electric heating tape; check whether it is working properly, with the normal operating temperature ranging from 100 to 120°C. If the heating strip fails, contact the manufacturer for handling.
Yes, I have a question regarding a refractometer here
There should be topics related to pH in the water treatment section
Analysis Instrument Samples [Topic]: A collection of commonly used analysis instrument samples and manuals. [Link]: http://bbs.hcbbs.com/thread-88139-1-1.html [Overview]: Manufacturers include ABB, Emerson, ROSEMOUNT, SIEMENS, DECKMA from Germany, LAR from Germany, HACH, Greenspan from Australia, Mettler, E+H, as well as other manufacturers. There are also some related discussion threads; although not many, they are all located in the industrial control section.
Analytical instruments are not used very often in the first place. And it’s more complex