De Nora NXT3000 Series User Manual (English)

Questions and Answers:

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David WaltersAug 5, 2025
What to do if the flowmeter ball bounces in De Nora Measuring Instruments?
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  Andrew PowellAug 5, 2025
  If the flowmeter ball bounces or the maximum gas feed rate cannot be achieved during normal operation of your De Nora Measuring Instruments, it could be due to several reasons. The vacuum regulator inlet filter screen might be dirty, requiring replacement of the gas inlet filter. Alternatively, the rate valve or flowmeter could be dirty and need cleaning, refer to the Service section for instructions. Another potential cause is fluctuating ejector water supply pressure leading to insufficient ejector vacuum; in this case, check and correct the water supply pressure as needed.
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Zoe LeeAug 13, 2025
How to fix vacuum leaks in De Nora Measuring Instruments?
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  brenda49Aug 13, 2025
  If you're experiencing vacuum leaks in your De Nora Measuring Instruments, it might be due to worn rate valve o-rings, which would need replacement. Another cause could be a loose tubing connector, which needs tightening. Finally, check for cracks in the tubing; if present, the tubing must be replaced.
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jonescharlesAug 19, 2025
Why is the gas feed rate not achieved at start-up in De Nora Measuring Instruments?
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  Juan JonesAug 19, 2025
  If the required gas feed rate is not achieved at start-up of your De Nora Measuring Instruments, it could be due to: * Leakage at vacuum line connections, vacuum regulator, and/or inlet to ejector - inspect each connection and remake as necessary. * Crimped vacuum lines - replace vacuum tubing and arrange lines to eliminate the crimp.
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Barbara JoyceAug 27, 2025
What to do if there is a flooded metering tube in De Nora Measuring Instruments?
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  Lindsey CaldwellAug 27, 2025
  If you notice a flooded metering tube in your De Nora Measuring Instruments, it is likely due to dirt on the ejector check valve seat or a worn seat. Clean or replace the ejector check valve seat.