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  1. Oxidation

    Seal Plans Number & other permutations

    I have become involved in a project where a client needs API pump & 682 seal plans. They have specified 1CW-FX as the preferred plan. I am relatively new to the pump seal plan world, so apologise if this appears to be a trivial question How does this relate to the numbering system Eg Plan 11+52...
  2. Oxidation

    S7 analogue data to MSExcel

    Dear all, I am no expert in the field of PLC programming-but i wondered if anyone could give me a few hints on how to export "analogue data" from a 315-2DP to excel format so i can then graph it in Excel. I have a datablock set up where the analogue values are held...but how do I then for...
  3. Oxidation

    Inhibited Monoethylene glycol

    Does anyone have any experience of measuring the pH of a water glycol solution (90% by wt glycol) at 40 Degree C. When using litmus paper I tend to get a reading 1,5 to 2 points lower than using a pH electrode. One more question, is MEG stable when in contact with standard motor gas or will it...
  4. Oxidation

    WinCC

    Does anyone know how to export historical data from Wincc to csv format without having to pay Siemens? Also how to get rid of the "i" (integer) mark in the trend screens for WinCC thanks
  5. Oxidation

    S7 315 DP & Profibus problems

    We have an installation using Profibus DP connecting the master (315-DP) to a PC running S7 with CP5611 card & a remote i/o station (Stahl). Comms speed is 187kbps. It was 1,5Mbps. Problem is I continuaaly get regular coomunications hang ups. I have laid new Profibus cables & installed a new...
  6. Oxidation

    Magntically coupled pumps

    I've just been on a start up that utilised magnetically coupled pumps. As I know next to nothing about this technology does anyone have any usefull information or links??
  7. Oxidation

    Magnetically coupled pumps

    I've just been on a start up that utilised magnetically coupled pumps. As I know next to nothing about this technology does anyone have any usefull information or links??
  8. Oxidation

    WinCC

    I'm using a system with S7 & WinCC for process monitoring. I have installed the WinCC license through Siemens Automation License Manager but Wincc constantly puts up an annoying pop up saying my license has expired. It is WinCc ver 6.2 RT 128. I have the original floppy disks & when I insert...
  9. Oxidation

    Profibus DP problems with S7

    I'm working on a system, remote I/O station, with Profibus link to an S7 & a Intellution package to show the process. The Profibus link is around 200m long & I'm getting regular "ghost" trips on the process plant due to momentarily lost comms or several transmitters suddenly show alarm levels...
  10. Oxidation

    Closing an analogue loop for trim control

    Anybody have a smart way of closing an analogue loop & using a feedback signal as a 'trim output'? This is an SLC5/04 with PV1000. Its controlling a burner with no oxygen signal feedback, I want to add the oxygen signal as a trim to the analogue output for the heat demand signal. Use the oxygen...
  11. Oxidation

    Valves for steam service

    I'm out on a plant in Egypt, the supplier has sent out some ball & gate valves with no tag/I.Ds on them & so I'm not sure which valve goes where. I have some with a seat of A105N body, CR13HF, disc CR13HF, stem CR13 & some A105N body, F6 stem, F6 disc, F6HF seat, R35WB050 Which of these would...
  12. Oxidation

    MI thermocouples

    Has anyone had dealings with so called mineral insulated & sheathed (Inox/ss/inconel)thermocouple starightening machines. These thermocouples are used on elevated flares in refineries/booms on rigs, and are pushed in to guide tubes. The straightening machine supplied by a company called ESCO...
  13. Oxidation

    sizing of transformer

    I have 9 110V ac to 5kv transformers, these are energised for 1 second periods every 60 seconds. I also have 3 110Vac panel mount octal type relays powered on continuously. How do I size the transformer required to step down the supply from 230 to 110, & size the fuse required. Thanks
  14. Oxidation

    Fan problem

    A centrigugal fan used as a blower for combustion has been causing problems. It was vibrating, but still running & producing less duct pressure than previously. It has an inlet butterfly valve for flow control. I hadn't noted the motor amps, but there are 3 other machines identical in set up &...
  15. Oxidation

    SLC 500

    I'm working on an SLC 500 based combustion control system. My fuel gas valve moves much quicker than the air control valve due to the size of the FCV on the FD fan. When increasing TIC output I end up with CO exceeding 30ppm for 30 seconds. There is no 'cross-linking' in the program for...

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