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  1. A

    Dynamic Vapour Compensation for GWR

    Dear All, Thanks a lot for your response. As I have already mentioned Emerson was already onboard. They have done required testing and that's why suggesting a different probe for the gas phase compensation. In our case gas pressure is 167 bar. This is hydrocarbon gas, mainly CH4. But my...
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    Dynamic Vapour Compensation for GWR

    In one of our applications to measure hydrocarbon level in a high pressure gas injection scrubber we have used EMERSON 5301 GWR probe. The instrument is not working properly and giving unreliable/erratic readings. Emerson is suggesting now to use different probe with "Dynamic Vapour...
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    Smart Positioner vs Normal Positioner, for Control Valves?

    Smart positioners are simply based on latest digital electronics, onboard CPU etc. They are capable of communicating through digital network such as HART, Fieldbus, Profibus etc. They are able to provide many critical diagnostic data locally and also through the digital communication network...
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    Emerson/Fisher Fieldvue DLC 3100 Level controllers

    DLC 3100 uses displacer type level sensor. Nothing bad about this since this has already worked in your application. But now a days a better approach is to use Diaphragm seal DP level transmitter or GWR level transmitter. Some plants also uses magnetostrictive level transmitters. Easiest...
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    The use of radar for point level measurement

    I am from Oil & Gas industry. As far as I know there is no such prohibition in the industry. It all depends on the application. May be the application you are indicating doesn't allow GWR or non-contact level to use technically. If you can give more details about the application then we may see...
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    IS & NIS Junction Boxes?

    Hello, For the NIS signals in the hazardous area you should use Exe junction boxes. For IS signals Exe junction boxes could be used provided additional requirements as mentioned in IEC60079-11 is fulfilled. To avoid all the unnecessary burdens it is advisable to use IS certified junction boxes...
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    Effect of Mass Flow Rate when using Orifice Plate

    Hi, Orifice will introduce additional pressure drop in the fluid flow. As a thumb rule you can assume pressure loss due to orifice will be approx. 0.2 bar. Now if your overall system pressure drop is much higher than this, then you won't notice any significant drop in flowrate. But if your...
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    Ma to 0-10 Volt Conversion

    Hello, 4-20 mA over 500 ohm will give you 2-10V. I assume you are using a converter here which is converting this 2-10V into 0-10V. It seems to me you are getting only 3V because transmitter is not able to drive max. current through the 500 ohm resistance. If you can give us voltage...
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    Single transmitter for two ESD outputs

    Thanks for your clarification. You have mentioned that it is not an uncommon practice. In which scenario it could be technically justified? If the transmitter PFD & HFT satisfies the SIL requirements for both the loops, is it allowed in compliance to IEC 61511?
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