Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!mips!apple!snorkelwacker.mit.edu!bloom-beacon!eru!hagbard!sunic!nuug!hod!mack.uit.no!staff.cs.uit.no!ken From: ken@staff.cs.uit.no (Ken-Arne Jensen) Newsgroups: comp.sys.hp Subject: Re: Monitors and the environment (sort of) Message-ID: <1990Nov20.115855.11759@mack.uit.no> Date: 20 Nov 90 11:58:55 GMT References: <101950167@hpcvlx.cv.hp.com> <-286539939@hpcupt1.cup.hp.com> Sender: news@mack.uit.no (USENET News System) Organization: University of Tromsoe Lines: 33 In article hardy@golem.ps.uci.edu (Meinhard E. Mayer (Hardy)) writes: >With monitors running at about 500W a piece I can feel the difference >in room temperature if I inadvertently leave mine on (blanked, of >course), overnight. What with energy prices, etc, one should probably >turn the monitor off for any period longer than one hour. >Hardy According to the Technical Data for the two 19" monitors 98751A and 98752A, the Power consumption is 80 Watts. The measured consumption on a 98752A is: Background: Illumination: Current: Voltage: Effect: X11 white background Full 565mA 230Vac ~130W X11 Normal background Normal 465mA 230Vac ~105W X11 ScreenSaver ON Normal 400mA 230Vac ~90W However when turning a cold monitor on, the current is up to 4A a short while. This is due to De-Gaussing of the CRT. The Line fuse in the monitor should therefore be: - 4A at 90 to 125Vac - T3.5A at 198 to 250Vac. And if you turn the power switch in the front OFF, the monitor still consumes some power. This is probably due to the design of the switch mode power supply. The power consumption in OFF condition is measured to be: 140mA at 230Vac that is ~30W. So the difference in power consumption between Screensaver mode and OFF mode is just 60W. Of course you could pull the plug to save additionally 30W. :-) -- //// Ken-Arne Jensen // Email: ken@staff.cs.uit.no / /// Computer Science Department // MHS: Ken.Jensen@esuit.uit.no // // University of Tromsoe // or C=no;PRMD=uninett;O=uit;OU=esuit; /// / N-9000 Tromsoe, NORWAY // Phone: +47 83 44042 | S=Jensen;G=Ken ////