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Posted by on August 4, 2008, 11:45 pm
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> >I used the same 20 page PDF document to test my inkjet printer that I used to
> >test my laser printer. (see my previous post and blog) I used the same Watts
> >Up Pro. The results were interesting.
>
> >The laser printer took 39 seconds to print the document, including warming the
> >fuser. It used 7.7 watt-hours. Backing out the warm-up energy, the actual
> >print job used 5.3 watt-hours.
>
> >The inkjet used 3.0 watt-hours to print the same document. The max wattage
> >during the print cycle was only 44 watts. The difference is the time
> >involved. The inkjet printer (in draft mode) took many minutes to print the
> >document. To print at the same quality (normal mode) as the laser printer,
> >the inkjet printer would take probably twice as long. If the time is indeed
> >twice the draft speed then the total watt-hours would be 6.
>
> >Thus, the laser and inkjet printers are neck and neck on total energy used.
> >Even more interesting is that the standby power is also close - 5.3 watts with
> >the LCD backlight on, 4.2 watts with it off. The laser printer uses around
> >6.5 watts in sleep mode.
>
> >So. One can conclude that while the laser printer uses far more POWER
> >(affecting the size inverter needed) than the inkjet, the ENERGY use is about
> >the same.
>
> That is a lot lower energy consumption than my laser (actually LED) Okidata
> color printer. I have a much simpler Watts up? meter with no recording
> capability. But eyeballing it shows about 910 watts while the fuser is
> heating; and to print 20 pages of mixed b/w and color it used about 34
> watt-hrs. (I didn't time how long that took). In standby mode it draws
> about 16 watts.
>
> --ron
Yep, the amateur strikes again. The information is pretty useless with
out knowing how long it took to do the printing.
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