UPS for 6545 LC/Q-TOF

Hi everyone,
How can we protect our LC/QTOF from unexpected power outages?
I asked Agilent technical support about using UPS, and they said it is not recommended.
I found in a previous question an answer about not using UPS in the GC-MS system, and Agilent explained the answer by varying half-cycle by half-cycle load behavior. Agilent argued that many UPS systems don't have sufficient damping and capacity to correct for the level and frequency of load variation created by the Agilent system.
That sounds rational for GC-MS, but what about LC?? Is there a highly repetitive level of load variation in LCMS as well?? I am wondering why it is not recommended to use UPS for LCMS.

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