Baseline noise and drift issue. G4212B Max light.

Why noise? I don't see a problem with noise.

With regards to the failed drift results, officially the test is to be run with a flow rate of 0.5 ml/min.

Dear sschombu,

The noise issue appears during run, with different flows. below is the example of flow 1 ml/min with water, but  0.5 ml/min gives the same problem of noise in baseline.
This problem appeared recently, before we haven't seen such baseline.

Not sure which quat pump you're using, but your pressure is too low. When it comes to testing, I would always have the 2m stainless steel restriction capillary installed. To find out more (whether the cell, the lamp, the optics etc. are to blame), you'll have to exclude the cell first. However, G4212X/G7117X detectors cannot be operated without cell. Either you go for the test cell, which is operated without liquid flow, or you have another, known good, Max-Light flow cell.

You could also try following the "Cleaning of Max-Light Cartridge Cell" section in the user manual.

Not sure which quat pump you're using, but your pressure is too low. When it comes to testing, I would always have the 2m stainless steel restriction capillary installed. To find out more (whether the cell, the lamp, the optics etc. are to blame), you'll have to exclude the cell first. However, G4212X/G7117X detectors cannot be operated without cell. Either you go for the test cell, which is operated without liquid flow, or you have another, known good, Max-Light flow cell.

You could also try following the "Cleaning of Max-Light Cartridge Cell" section in the user manual.

Hello
thank you for your advices.
Unfortunately we don't have a test cell so we decided to order a new max-light cell.

Kind regards,
Rustam