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  1. CMfgE1

    Very high turndown flow meter

    You didnt mention the material type. No matter though. A coriolis meter will be fine. Magmeters are limited by the conductivity of the material, A Differential transmitter (DP) would also work in this application. Remember, your flow rate is only as accurate as the tuning on the valve...
  2. CMfgE1

    Share some light on the DCS market, please...

    Not the graphics not. That was developed by invensys. But MTL made the hardware. I had the pleasure of installing all the cards, backplanes, power supplies and such. They all came together from MTL with there logo. Is it possible they didnt design some of the components. Yes it is and probably...
  3. CMfgE1

    Share some light on the DCS market, please...

    Side note: Delta V originally started out being developed and manufactured by MTL. In fact Emerson contracted MTL to make components for them. Then Emerson and MTL had a falling out. MTL dropped the line and Emerson continued development. MTL makes intrinsically safe barriers. Just my .02...
  4. CMfgE1

    CNC positional tolerances

    The problem with specifying tolerances is that the vendor must now hold to those all the time. Its common knowledge that when you tighten the tolerance you will pay more. This is caused by increase machine time and such. So if your vendor is holding a .005" center line hole location, I would...
  5. CMfgE1

    Thermocouple module causing flashing display

    Yeah - Damn programming - Wel I was somewhat close- Nice catch djs. Glad you solved your problem Logger Later Quote: "Its not what you know, its who you know" Everythings a learning experience-Everything
  6. CMfgE1

    Thermocouple module causing flashing display

    If you mean the TC's are physically in parallel, djs is right. You cant physically put them in parallel and expect a proper temp. Your module has 8 inputs. How many TC's do you have? What kind of TC are you using? Also is the PLC programmed properly? Good luck!!! Quote: "Its not what you...
  7. CMfgE1

    The low temperature interlock seems strange

    Gotcha, Thanks, I had a hard time visualizing your problem. And your concerned the loop is not failsafe. Without knowing the model of the switch, heres my take. There could be "bucking of power", that is the PLC is providing power in the loop and the switch is also providing power. It is...
  8. CMfgE1

    How best to ask for CMM data ?

    Agree with Kapitan. If the supplier does not give you useful information I would consider another contractor. There are hundreds of companies that do this. And frankly they should know what info to give you. Give them a shot to redeem and if they still are not helpful, ship themout and get...
  9. CMfgE1

    Milling Hardened Material

    I would suggest ceramic for this hard of a material. Hopefully you already removed the bulk and are just finishing. If this is the case, using a diamond wheel for grinding or ceramic for cutting should do the trick. You can also have carbide end mills coated with diamond using the CVD (chemical...
  10. CMfgE1

    Treating acid rinse water?

    I would look into Soda Ash (Na2CO3). It is not cost effective to transport this in solution form. Most sites Ship in dry soda ash then mix the solutionon site. This is feasable if you have most of the support already in place. And budget of course. But this has better benefits and should not...
  11. CMfgE1

    Share some light on the DCS market, please...

    I have worked with both DCS and PLC systems and have found strenghts in both. Siemens has seemed to tank on there DCS, although some proper management could change that. A fairly new system called Delta V hit the market about 5yrs ago(?) and has done well. Its had several owners but is...
  12. CMfgE1

    The low temperature interlock seems strange

    Your information is very confusing. I will assume that your having RTD difficulties. RTD's (3 or 4 wire) work off the principal of resistance. The 3rd and/or 4th wires of an RTD are used for compensation of the length of the High and Low signal wires. This makes the OHM value more accurate by...
  13. CMfgE1

    ROUT

    Doesnt not sound familiar. Is there a reason he cannot use the PID to tune the controller? I have yet to see a case where you cant. But theres not enough info to determine that. What kind of loop is he trying to tune and what DCS are you using? I wouldnt let him go to far without a detailed...
  14. CMfgE1

    Pressure control valve

    Badger is a good quality valve. You will need an I/P (current to pressure convertor) and a point on your IO board. The valve I/P will get its signal from the programmed pressure. The computer will send a 4-20ma signal to the I/P which will put out a 3-15psi signal to the valve. You will need...
  15. CMfgE1

    Define

    Loop powered- An instrument or series of instrument that accepts power for the signal loop from a seperate power source. Those power sources generally are the control system, Usually an input card will provide 24v power and also carry the 4-20ma signal back to the card or a power supply used...
  16. CMfgE1

    Steel cable startup

    Im just posting to say WOW to CCW!!!! Thats one of the best answers Ive read In a post!!!! Very informative and right to the point. Now if I onl knew what you were talking about!! LOL Good Luck! Quote: "Its not what you know, its who you know" - anybody trying to find a decent job...
  17. CMfgE1

    Wireless Field Transmitter for Offshore Facilites

    Wireless instrumentation is still in its infancy, but manufacturers are making strides every year. The last time I had a demo of the equipment it was clear the technology was not quite ready yet. This was 2 yrs ago and interference was a major problem, distance as well. Now if your setting up a...
  18. CMfgE1

    Air Intake

    Dont worry about it LQ, You cant learn if you dont ask questions. Take the suggestions these gentleman offered, try them out and provide some feed back on numbers. This way you will learn how to apply the formulas. This is a must in the engineering profession. All the while you will also gain...
  19. CMfgE1

    electrical / plc control panel design / drawing program

    AutoCad Electrical should do the trick. http://usa.autodesk.com/adsk/servlet/index?siteID=123112&id=4255921 There are lots of programs to do this with. Some more specific than others. Pro-E, Solid Works, AutoCad, CadKey. There are so many programs is comes down to a matter of finance. Good...
  20. CMfgE1

    2 CT'S AT IDENTICAL LOADS BUT ONE HAS HIGHER CO2

    Iwould calibrate the CO2 instrument first. Then go from there. Verify the data thats being given to you will help save you some steps. It could be your CO2 monitor is not functioning properly and that you have a bad sensor Good Luck!! Quote: "Its not what you know, its who you know" -...

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