LOW PRESSURE AND SYSTEM FAILURE PROBLEM

[faris]

Hi, I have problem with my 1090. The high pressure pump starts regular and also the low pressure pumps. After 30 second the low pressure pump turned off (high pressure working normal) by the HPLC along with system failure message.

[Markus Laeubli, Metrohm]

Check the 'low pressure' setting of the low pressure pump.

[HPLCCONSULT]

Perhaps this is a translation issue "'low pressure settings", but there are no settings for the low pressure syringe pumps. They are fixed stroke units. Only flow rate is adjustable.

What is the error code # ? If you have ChemStation, then look in the instrument log book as it will list the actual error(s). "System Errors" are serious errors such as might be caused by a leak, part failure, incorrect response from a sensor and so on. The 1090 will provide you with more detailed info if you look in the error logs. Check for leaks, that the rotary valve(s) are working and that fluid is being pumped from the low pressure pump(s) to the LPC and HP Pump.

Does this happen on all channels ? Are you using the 'diagmon' (sp) ? It will provide you with the LPC pressure values of the low pressure pump(s) as well as the high pressure pump. Which HP 1090 do you have (PV5 or DR5; Ternary, Binary) ? Is it an A, N or L model ? How do you control it (ChemStation, Integrator ...) ?

[faris]

Hi every one. It was the check valve that giving me the low pressure error and I fixed it. Thank you for the replay