Edwards nEXT 240D Instruction Manual

Edwards nEXT 240D Instruction Manual

Turbomolecular pumps
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Description
nEXT240D
nEXT240T
nEXT300D
nEXT300T
nEXT400D
nEXT400T
Instruction Manual
nEXT Turbomolecular Pumps
nEXT240, nEXT300 and nEXT400
B800-00-880
Issue D Original
Item Number
B812XXXXX
B813XXXXX
B822XXXXX
B823XXXXX
B832XXXXX
B833XXXXX

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Questions and answers

Hao He
January 24, 2025

The speed of the NEXT 240 has been consistently below 5%. It has been confirmed that the working condition of the front stage pump is normal and the air pressure is within the normal range. Observing the pump indicator light, it indicates that the oil cartridge needs to be replaced. Is this the reason for the speed remaining below 5%, or is there another reason? By checking the operation log of the pump, it was found that the voltage was 22.4V and the current remained below 1A during operation. The corresponding power was also very low. Did the pump recognize the need to replace the oil cartridge and limit its own power? Looking forward to your answer. thank you very much.

1 comments:
Mr. Anderson
February 10, 2025

The low speed of the Edwards nEXT 240D below 5% could be caused by multiple factors. While the oil cartridge does have a recommended service time and should be replaced after a certain number of hours, there is no direct indication that a worn oil cartridge alone would cause the speed to drop below 5%. Other potential reasons could include power supply limitations, standby speed settings, or an active fail condition indicated by flashing error codes. Checking the error codes and ensuring sufficient power supply would help diagnose the issue.

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