I am trying to do an initial tune with our 6520A after I vented the instrument. Error occured while it was optimizing for Quad AMU and the error message is "No valid optimum found in ramp (abundances were all too low)".
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I am trying to do an initial tune with our 6520A after I vented the instrument. Error occured while it was optimizing for Quad AMU and the error message is "No valid optimum found in ramp (abundances were all too low)".
I've had this before on a 6530 - from what I remember, the calibration mix was the problem. I think quad tuning requires undiluted ESI-L rather than the dilution you'd usually prepare for the TOF tune. Have you tried that?
I've had this before on a 6530 - from what I remember, the calibration mix was the problem. I think quad tuning requires undiluted ESI-L rather than the dilution you'd usually prepare for the TOF tune. Have you tried that?