HP5973..autotune problem

[Rick]

Hi!
I have clean my source from my HP5973N but repeller give a high value (34. and entrance lens is low (9)...normally, repeller give 24 and entrance lens give 16...i have reclean 2x my source but i have again the same value.
Is it possible that my electron multiplier horn is the source of my problem?

[chhubert]

Rick,
Did you reset the autotune value to default prior to tuning? If autotune is started with previous autotune settings, the tuning algorithm simply re-adjusts the settings back and forth a little to achieve your pre-set criteria. Try and see the difference if you start tuning after resetting the tune values to default first.

[jimmyhu]

I would like to share some interesting findings about Repeller figures on tune report I observed on my Agilent 5973N. The Repeller figure was 32 when a tune was performed using a method method (Flow rate: 0.5 mL/min) and the Repeller figure was 25 when a tune was performed using a normal working method (Flow rate: 1.0 mL/min).

Jimmy

[jimmyhu]

Sorry about my last post that contained a typo. The method at flow rate of 0.5 mL/min means standby method.

Jimmy