Waters ACQUITY QDa, Обзор и руководство по обслуживанию

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June 28, 2016, 715003956 Rev. C
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status LED shows green, and the instrument is ready for use. If the check identifies a problem, the
software prompts you to start an automatic correction process. The quadrupole resolution and
mass scale calibration can also be checked on demand without powering off the instrument.
To learn how to enable startup checks, see the instrument’s online Help.
1.4 Sample inlet
You can introduce sample into the QDa detector from a ACQUITY LC system, or from a syringe
pump.
If you are using an LC system, connect the ACQUITY QDa to the preceding instrument in your
system using the supplied probe assembly. You can use 250-mm or 500-mm probe assemblies,
whichever best suits your configuration. If required, use a union to extend the length to fit with your
configuration.
If you are using a syringe pump, connect the QDa detector’s probe assembly directly to the
syringe pump.
Recommendation: Where possible, use the 250-mm PEEK tubing. Doing so minimizes band
broadening.
1.5 Vacuum system
An internal turbomolecular pump and external backing pump create the instrument’s vacuum. The
Performance instrument uses a separate rotary vane backing pump, and the Standard instrument
uses a diaphragm pump attached to the back of the instrument.
Vacuum leaks, electrical failures, and vacuum pump failures cause vacuum loss, the damage from
which is prevented by protective interlocks. The system monitors turbomolecular pump speed and
continuously measures turbo power. The turbo speed also serves as a switch, stopping operation
when it senses vacuum loss.
Notice: Ensure suitable tubing is used to prevent the pressure exceeding the limits of the
preceding instruments.