QDa collects blank data then crashes when collecting 7 SIR functions at 2 Hz, need to reboot QDa - WKB27856

SYMPTOMS

• QDa MS method with exactly 7 SIR functions and a Sampling Frequency of 2 Hz
• No data collected - not a flat baseline but empty chromatograms
• System appears to acquire as normal, running the gradient but does not move on to the next sample
• System will not communicate - loss of communications (comms)
• Mass Spectrometer must be power cycled to work again
• May need to reset all inlet modules
• Works with 8 or 6 functions

ENVIRONMENT

• QDa with Firmware V (Not seen on Rev U)
• MassLynx SCN 947 and SCN 961
• MassLynx SCN 976
• MassLynx SCN 1036
• Empower
• Windows 10

CAUSE

Bug on the instrument related to Firmware version V
Displayed in the Console > QDa Detector > Configure > View Module Information > Instrument PLD Version = V

FIX or WORKAROUND

1. No fix at the moment
2. PFD 19653 has been raised
3. Workaround: Add a "dummy" function to the method, collecting minimal data

ADDITIONAL INFORMATION

Also seen with MassLynx SCN 1036

With Full Scan ESI in MS mode in Positive and Negative you cannot run SIRs between 7 and 9. (6 and 10 SIRs work fine)