No UPS on IN76

[SMM]

I was just informed by InFocus Tech Support that you cannot use a UPS with the IN76 unless it is true "step wave" not a "Stepped approximation to a sinewave". Seems this is only found on very high end (read ++$5000 units). I was surprised and disappointed to find this out, having just spent $500 on an APC UPS with Stepped approximation to a sinewave.

 

[WorldLeader]

ALLLL right... Hopefully others won't make this mistake.

 

[majorloser]

Projector UPS

Considering the UPS is really only for cool down of the projector in case of a power failure instead of "hot stops" or to take a hit from a power surge, I'd still keep the UPS on the projector. Lesser of two evils.

A stepped sine wave is better than a perfect sine "brown out" or surge

 

[Rob Babcock]

I was just informed by InFocus Tech Support that you cannot use a UPS with the IN76 unless it is true "step wave" not a "Stepped approximation to a sinewave". Seems this is only found on very high end (read ++$5000 units). I was surprised and disappointed to find this out, having just spent $500 on an APC UPS with Stepped approximation to a sinewave.

What do they claim will happen if you do so?

 

[Audioholics]

Seems this is only found on very high end (read ++$5000 units).

This sounds fishy to me, though I have seen some units react badly to UPS systems. In any case, the top of the line APC S-15 unit is only ~$1500 MSRP and it's doubtful you will do better than it regardless of price. I run my projector off of an S-15, but my test units all run off of an H-15 ($399) with no apparent problems (so far).

 

[WmAx]

I guess the power supply is not so great on that unit, if it 'requires' a perfect sine wave. However, you can get true sine wave output(<5% THD) on APC's SmartUPS series of UPS units. You can get these starting at just a few hundred dollars. The lower cost BackUPS series uses 'stepped' sine wave output with much higher distortion. I have used both on a sensitive graphics monitor, and the BackUPS makes the monitor hum when on back-up power. The SmartUPS operates it on back-up power just like a normal connection to the wall socket.

-Chris

 

[majorloser]

APC SmartUPS

I guess the power supply is not so great on that unit, if it 'requires' a perfect sine wave. However, you can get true sine wave output(<5% THD) on APC's SmartUPS series of UPS units. You can get these starting at just a few hundred dollars. The lower cost BackUPS series uses 'stepped' sine wave output with much higher distortion. I have used both on a sensitive graphics monitor, and the BackUPS makes the monitor hum when on back-up power. The SmartUPS operates it on back-up power just like a normal connection to the wall socket.

-Chris

I use APC SmartUPS. Great units for affordable prices. You can even pick them up as factory refurb's from the APC Factory Outlet Store:
http://buy.apc.com/commerce/storefronts/factoryoutlet/default.aspx?StorefrontCode=apcfo&CountryCode=us&tsk=

Just stay away from their lower end BackUPS and Conext lines. They don't have as tight of specs as the SmartUPS line.