Instrument Technical Specification Sheet
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I used to be involved in instrument maintenance for only one year; now I’m at a new factory. Today, the technical specifications for the instruments were submitted for review, and I need to know from which aspects to start.
Review it once a year... If it’s related to design, then involve the designer and have a look together; ask the designer more questions.
1. Verify the process conditions of the medium. 2. Check whether the instrument selection meets the requirements or is suitable for the operating conditions of that medium. Is the measurement range appropriate? Is the measurement principle or working principle correct? 3. Does the material meet the requirements? 4. Pressure rating, flange standards, etc. 5. Explosion protection rating, protection level, accuracy requirements? 6. Instrument signals, power supply. 7. Electrical interfaces, instrument accessories, etc. 8. Is it easy to install and maintain? Are there any better alternative forms of gauges, in terms of cost-performance? Is it a standard general-purpose instrument? 9. Does it meet the relevant requirements of the owner?
Theoretically, that’s the case, but in terms of time, it’s not possible to check every parameter for each table; therefore, it’s necessary to focus on the important instruments and conduct random inspections, which is more effective.
What instrument? Different instruments have different focus areas for inspection, and targeted inspections are relatively time-saving
There are pressure gauges, pressure transmitters, bimetallic thermometers, PT100 sensors, venturi meters, orifice plates, mass flow meters, and so on – in other words, all types of primary and secondary instruments
Actually, it’s the chief engineer who is reviewing it; he just asked me to take a look as well, but I can’t really understand it
Only do reviews in a year? Your boss is really too reluctant to spend money on hiring people. Verification for at least 5 years, audit for at least 10 years. Choosing the wrong valve can result in losses of tens of thousands of dollars; it only costs a few dollars to hire someone.
The chief engineer is reviewing it; he asked me to take a look as well, but I can’t quite understand it