From owner-freebsd-questions@FreeBSD.ORG Tue Oct 15 12:27:01 2013 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id F22C5DC4 for ; Tue, 15 Oct 2013 12:27:00 +0000 (UTC) (envelope-from ralf.mardorf@alice-dsl.net) Received: from mail33c50.megamailservers.eu (mail223c50.megamailservers.eu [91.136.10.233]) by mx1.freebsd.org (Postfix) with ESMTP id 61C062D92 for ; Tue, 15 Oct 2013 12:26:59 +0000 (UTC) X-Authenticated-User: ralf.mardorf.alice-dsl.net Received: from [85.182.20.69] (e182020069.adsl.alicedsl.de [85.182.20.69]) (authenticated bits=0) by mail33c50.megamailservers.eu (8.13.6/8.13.1) with ESMTP id r9FCCb5d004987 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Tue, 15 Oct 2013 12:12:39 +0000 Message-ID: <1381839157.757.55.camel@archlinux> Subject: Re: UPS buying suggestion From: Ralf Mardorf To: freebsd-questions@freebsd.org Date: Tue, 15 Oct 2013 14:12:37 +0200 In-Reply-To: <1381838368.757.50.camel@archlinux> References: <20131015134826.528289be@X220.ovitrap.com> <1381838368.757.50.camel@archlinux> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.10.1 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-CSC: 0 X-CHA: v=2.0 cv=fcYaPTsF c=1 sm=1 a=ztyVO8lz3lMybfiksaaZaw==:17 a=ALKwz0t7uJUA:10 a=IkcTkHD0fZMA:10 a=rsIYsMhsAAAA:8 a=8-3U5OmvWyEA:10 a=Y2G3NUB4A9FmsYkNTNcA:9 a=QEXdDO2ut3YA:10 a=ztyVO8lz3lMybfiksaaZaw==:117 X-CTCH-RefID: str=0001.0A020209.525D3137.01A5, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 X-CTCH-VOD: Unknown X-CTCH-Spam: Unknown X-CTCH-Score: 0.000 X-CTCH-Rules: X-CTCH-Flags: 0 X-CTCH-ScoreCust: 0.000 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 15 Oct 2013 12:27:01 -0000 On Tue, 2013-10-15 at 13:59 +0200, Ralf Mardorf wrote: > On Tue, 2013-10-15 at 13:48 +0800, Erich Dollansky wrote: > > As you need the current anyway, I would use an ampere meter to > > determine the exact current drawn. I got already some surprises there. > > You can do a Ampere measurement, but that doesn't help you, you need to > measure the consumption over a longer period. > > Regarding to the hair dryer, it's an electromotor ;). PS: Please don't recommend to use multi meters, even if they would provide the wanted results. Using multi meters for the mains only should be done, when galvanic isolation by an isolating transformer is given.