Waters ACQUITY QDa, Обзор и руководство по обслуживанию

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June 28, 2016, 715003956 Rev. C
Page 33
Required materials:
• New entrance-aperture seal and entrance-aperture disc.
• Chemical-resistant, powder-free gloves.
To replace the entrance-aperture seal:
1. Dispose of the old entrance-aperture seal and disc according to your local environmental
regulations.
2. Insert the new entrance-aperture seal and disc into the sample cone.
Requirement: The Standard and Performance QDa Detectors require different entrance
aperture discs. When ordering a replacement entrance-aperture disc and seal, ensure that
the entrance-aperture disc is the correct type.
3. Refit the source components (see page 37 ).
3.7.3 Removing the ion block
Clean the ion block when cleaning the sample cone assembly fails to increase signal sensitivity.
Required materials:
• Chemical-resistant, powder-free gloves.
• 2.5-mm Allen wrench
.
To remove the ion block:
1. Insert a flat-blade screwdriver beneath the top of the calibration pin, and then lever the pin
away from the ion block.
Tip: To locate the calibration pin, see the figure on page 32 .
2. Remove the sample cone assembly from the right-hand side of the ion block (see page 30 ).
3. Remove the 2 screws securing the ion block to the instrument using the 2.5-mm Allen
wrench.
Warning: To avoid personal contamination with biohazards or toxic materials, always wear
chemical-resistant, powder-free gloves while performing this procedure.
Warning: To avoid personal contamination with biohazards or toxic materials, always wear
chemical-resistant, powder-free gloves while performing this procedure.
Warning: To avoid puncture injuries from the sharp calibration pin, use care when
removing it from and replacing it in the ion block.