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  1. clarke

    Sizing a fire hose tank

    Okay thanks for your help cdafd. Is there a standard time for the tank to last?
  2. clarke

    Sizing a fire hose tank

    Supplying hose reels only? Yes. Need water to protect buildings ?? The hoses are used just for trained personel to tackle small fires. Need water for fire sprinkler systems??? No we have a seperate tank and pump for the sprinklers. Any ahj that might set the demand?? Fire pump involved...
  3. clarke

    Sizing a fire hose tank

    Hi, I need to size a tank that will supply a pump that will pump water to a number of hose reels around our site. What information do i need to enable me to calculate the tank size? Thanks Clarke
  4. clarke

    dust detection

    Thanks comokid the filter typically runs at 13millibars obviously this changes between clean and dirty but for the purpose of what i was doing i used a 0 to 15mbar guage and then set the switch to sense if the pressure dropped below 13mbar. There was no cange of pressure shown on this gauge when...
  5. clarke

    dust detection

    i need to detect when dust is present in an exhaust stack and was wondering if anyone knows of any probes or sensors that could be used. I have heard of using triboelectric sensors but these are exspensive and seem to be abit ott for what i want. I have tried using a differnetial pressure switch...
  6. clarke

    wincc alarm picture

    Hi can anyone tell me how to set up a picture to pop up in screen of a wincc project when triggered by an incoming alarm.
  7. clarke

    write wincc tags directly to excel

    Hi, How do open an excel spreadsheet/workbook from wincc and then enter data into specific cells, also how can i change to a differrent sheet in the same workbook. Iam using version 5 of wincc. Thanks in advance for any responses Clarke.
  8. clarke

    Outdoor Motor Supply

    We Have a conveyor installed outdoors with a 3 phase supply to motor and stop/start push buton station, my question is are there any special requirements for 3 phase outdoor supplies i.e rcd protection and earthing, like single phase domestic supplies??
  9. clarke

    prospective earth fault current

    Thanks for that volts/Zs Excellent
  10. clarke

    prospective earth fault current

    Can anyone tell me the calculation for prospective fault current for the intake of a house. Thanks in advance. Colin
  11. clarke

    wincc report to excel

    Can any one tell me how to tranfer information from wincc into an excel file, all I understand at the moment is that it will be in .csv format.
  12. clarke

    Pulse counting???

    Hi I have a number of product scales that I need to take the flow rate from. I am using an s7-400 plc, there are several different types of scale a number of them can easily be connected to profibus, but other older versions only have a 240v pulse output each time they tip which at the moment...
  13. clarke

    sensor type??

    it is driven by an electric motor. The motor load does drop when a screen bursts but this also so happens when other things happen within the grinder so we are looking to isolate a screen burst some other way. The material is maize.
  14. clarke

    siemens and hart

    Has any one had any experience with siemans and hart protocol, I need to get some info from a steam flow mass probar but dont know where to start
  15. clarke

    sensor type??

    we have a machine for grinding product, when the machine grinds the finer product passes through a screen with the larger product passsing out of the end of the machine. If the screen gets a hole the larger product contaminates the finer. My question is does anyone know of a sensor that could...
  16. clarke

    connect my laptop to s7 400

    I need to get to the program though ethernet
  17. clarke

    connect my laptop to s7 400

    I want to connect my laptop to our s7 400 plc through our ethernet network, I know it can be done because our contractor uses this method. The problem im having is setting up the siemens netpro (I think thats what its calle) software for my ethernet connection. Can anyone help
  18. clarke

    safety relay needed????

    We have a large machine with two discs rotating at high speed, to shut down the machine if it becomes unbalanced a vibration switch is to be fitted. I have to send a signal to an s7 plc via an et200 rio panel to signal that the vibration switch has been triggered. Is it o.k to let the plc...
  19. clarke

    modicon to siemens conversion

    We are looking to upgrade are existing modicon quantum plc to a seimens s7-400 plc is there anyway to transfer the program directly to step7 or will I have to re-write the whole program. We currently program the modicon plc using modsoft 2.6.
  20. clarke

    electrical maintenance

    can anyone tell me what types of maintenance should be carried out on an electrical maintenance schedule. I realise that a lot depends on the plant you're maintaining but im just looking for a general guideline. hope you can help

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