Quaternary pump pressure reading wrong

Question

Quaternary pump showed a wrong, non-responsive pressure reading even if no flow, how to fix it? It was used about 1.5 years ago without this problem. Thanks.

abasdeo · Accepted Answer

Hello Ishtiyaq, 
 Don't know the model of the QUAT pump but based on your description, it would appear your pressure sensor is bad. It should read 0 at no flow and of course increase as you turn the flow on. The other possibility is the main board but since those fail so rarely, I would go after the pressure sensor first.

ISH · Answer

Hi 
 https://community.agilent.com/technical/lc/w/wiki/7687/troubleshooting-high-pressure-issues-in-agilent-lc-systems 
 
 Follow above link to check where is problem. 
 First, u should see frit of purge valve. 
 Did any PM done after one year or not?

ISH · Answer

If assume everything okay but still pressure not zero then doubt will go on Damping unit of pump because damping give pressure signal to LPM board of pump. 
 I will suggest to call your local agilent suppprt to check this because pump need to open to see exact root cause. 
 Thanks

Quaternary pump pressure reading wrong

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