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Pure Sine Wave question

T

TemjinGold

Diamond Member
So it's around time for me to start hunting for a replacement UPS just to keep on hand and I've been wondering: All this stuff about Pure Sine Wave, does that only apply if your PSU isn't compatible with non-Pure Sine Wave units or are Pure Sine Wave units still better for you even if your PSU IS compatible? Can someone with expertise elaborate? Thanks!
 
Blain said:
Do you plan on running a digital clock with the UPS?
Click to expand...
i'm not sure why this question is pertinent, but i'm going to assume you know something i don't...plus i'd like to plug my digital alarm clock into my UPS since it has a spare outlet, so if you could elaborate on this i would appreciate it...
 
Blain said:
You should use a pure sine wave UPS if you're running a laser printer off it.
Click to expand...

Oops, sorry, the laser printer is plugged straight into the wall.

Also wondering, if I don't have any thing that *needs* pure sine wave, will I still benefit from having it?
 
Straight from Xantrex: Sine Wave vs. Modified Sine Wave: Which Is Better?

"...Other digital clocks use the incoming AC current to calculate time.
The processor ‘counts’ how many times the voltage reaches zero, or ‘zero crosses.’
TSW (true sine wave) waveforms cross zero cleanly, while MSW waveforms ‘rest’ on zero for a few milliseconds.
The processor could interpret this rest as multiple zero crosses resulting in the time being calculated incorrectly. Many electronic devices utilize digital time calculations as a function of their operation.
Other issues that can occur with MSW inverters are many models of electric blankets, coffee makers, laser printers and other devices that regulate heat using a microprocessor that may not operate correctly."
 
If you were running your whole house on inverted power you would benefit from pure sine wave power.
But realistically you're just running your PC and a couple of peripherals.
They're all able to deal with less than pure sine wave power.
I'd suggest an AVR type UPS vs a "dumb" UPS.
I'm running various components behind CyberPower CP1350AVRLCD and CP1500AVRLCD units.
When the power dips or drops out all together, my parts are happy as clams.
 
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